Energy Change for Climate Control
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  • Cumbria Floods : Climate Defenceless

    Posted on December 7th, 2015 Jo No comments

    I fully expect the British Prime Minister, David Cameron, will be more than modicum concerned about public opinion as the full toll of damage to property, businesses, farmland and the loss of life in Cumbria of the December 2015 floods becomes clear. The flooding in the Somerset Levels in the winter of 2013/2014 led to strong public criticism of the government’s management of and investment in flood defences.

    The flood defences that were improved in Cumbria after the rainstorm disaster of 2009 were in some cases completely ineffective against the 2015 deluge. It appears that the high water mark at some places in Cumbria was higher in the 2015 floods than ever recorded previously, but that cannot be used as David Cameron’s get-out-of-jail-free clause. These higher flood levels should have been anticipated as a possibility.

    However, the real problem is not the height of flooding, but the short recurrence time. Flood defences are designed in a way that admits to a sort of compromise calculus. Measurements from previous floods are used to calculate the likelihood of water levels breaching a particular height within a number of years – for example, a 1-in-20 year flood, or a 1-in-200 year flood. The reinforced flood defences in Cumbria were designed to hold back what was calculated to be something like a 1-in-100 year flood. It could be expected that if within that 100 years, other serious but not overwhelming flooding took place, there would be time for adaptation and restructuring of the defences. However, it has taken less than 10 years for a 1-in-100 year event to recur, and so no adaptation has been possible.

    This should suggest to us two possibilities : either the Environment Agency is going about flood defences the wrong way; or the odds for the 1-in-100 year flood should be reset at 1-in-10-or-so years – in other words, the severity profile of flooding is becoming worse – stronger flooding is more frequent – which implies acceptance of climate change.

    The anti-science wing of the Conservative Party were quick to construct a campaign against the Environment Agency in the South West of England in early 2014 – distracting people from asking the climate change question. But this time, I think people might be persuaded that they need to consider climate change as being a factor.

    Placing the blame for mismanagement of the Somerset Levels at the door of the Environment Agency saved David Cameron’s skin in 2014, but I don’t think he can use that device a second time. People in Cockermouth are apparently in disbelief about the 2015 flooding. They have barely had time to re-establish their homes and lives before Christmas has been cancelled again for another year.

    Will the Prime Minister admit to the nation that climate change is potentially a factor in this 2015 waterborne disaster ?

    I remember watching in in credulity as the BBC showed the restoration of Cockermouth back in 2010 – it was either Songs of Praise or Countryfile – I forget which. The BBC were trying to portray a town getting back to normal. I remember asking myself – but what if climate change makes this happen again ? What then ? Will the BBC still be mollifying its viewers, lulling them back into a false sense of security about the risks of severe climate change ? What if there is no “normal” to get back to any more ? Is this partly why the Meteorological Office has decided to name winter storms ?

    Can future climate-altered floods be escaped – or are the people of Britain to remain defenceless ?

  • The Price on Carbon

    Posted on June 2nd, 2015 Jo No comments

    Although The Guardian newspaper employs intelligent people, sometimes they don’t realise they’ve been duped into acting as a mouthpiece for corporate propaganda. The “strapline” for the organisation is “Owned by no one. Free to say anything.”, and so it seemed like a major coup to be granted an interview with Ben Van Beurden of Royal Dutch Shell, recorded for a podcast that was uploaded on 29th May 2015.

    However, the journalists, outoing editor Alan Rusbridger, Damian Carrington and Terry McAllister probably didn’t fully appreciate that this was part of an orchestrated piece of public relations. The same day as the podcast was published, Shell, along with five other oil and gas companies wrote a letter to officials of the United Nations Framework Convention on Climate Change (UNFCCC).

    Favourable copy appeared in various places, for example, at Climate Central, The Daily Telegraph and in the Financial Times where a letter also appeared.

    In the letter to Christiana Figueres and Laurent Fabius of the UNFCCC, Shell and fellow companies BP, BG Group, Eni, Total and Statoil, wrote that they appreciate the risks of the “critical challenge” of climate change and that they “stand ready to play their part”. After listing their contributions towards a lower carbon energy economy, they wrote :-

    “For us to do more, we need governments across the world to provide us with clear, stable, long-term, ambitious policy frameworks. This would reduce uncertainty and help stimulate investments in the right low carbon technologies and the right resources at the right pace.”

    “We believe that a price on carbon should be a key element of these frameworks. If governments act to price carbon, this discourages high carbon options and encourages the most efficient ways of reducing emissions widely, including reduced demand for the most carbon intensive fossil fuels, greater energy efficiency, the use of natural gas in place of coal, increased investment in carbon capture and storage, renewable energy, smart buildings and grids, off-grid access to energy, cleaner cars and new mobility business models and behaviors.”

    The obvious problem with this call is that the oil and gas companies are pushing responsibility for change out to other actors in the economy, namely, the governments; yet the governments have been stymied at every turn by the lobbying of the oil and gas companies – a non-virtuous cycle of pressure. Where is the commitment by the oil and gas companies to act regardless of regulatory framework ?

    I think that many of the technological and efficiency gains mentioned above can be achieved without pricing carbon, and I also think that efforts to assert a price on carbon dioxide emissions will fail to achieve significant change. Here are my top five reasons :-

    1. Large portions of the economy will probably be ringfenced from participating in a carbon market or have exemptions from paying a carbon tax. There will always be special pleading, and it is likely that large industrial concerns, and centralised transportation such as aviation, will be able to beat back at a liability for paying for carbon dioxide emissions. Large industrial manufacture will be able to claim that their business is essential in sustaining the economy, so they should not be subject to a price on carbon. International industry and aviation, because of its international nature, will be able to claim that a carbon tax or a market in carbon could infringe their cross-border rights to trade without punitive regulatory charges.

    2. Those who dig up carbon will not pay the carbon price. Fossil fuel producers will pass any carbon costs placed on them to the end consumers of fossil fuels. A price on carbon will inevitably make the cost of energy more expensive for every consumer, since somewhere in the region of 80% of global energy is fossil fuel-derived. Customers do not have a non-carbon option to turn to, so will be forced to pay the carbon charges.

    3. A price on carbon dioxide emissions will not stop energy producers digging up carbon. An artificial re-levelising of the costs of high carbon energy will certainly deter some projects from going ahead, as they will become unprofitable – such as heavy oil, tar sands and remote oil, such as in the Arctic. However, even with jiggled energy prices from a price on carbon, fossil fuel producers will continue to dig up carbon and sell it to be burned into the sky.

    4. A price on carbon dioxide emissions is being touted as a way to incentivise carbon capture and storage (CCS) by the authors of the letter – and we’ve known since they first started talking about CCS in the 1990s that they believe CCS can wring great change. Yet CCS will only be viable at centralised facilities, such as mines and power plants. It will not be possible to apply CCS in transport, or in millions of homes with gas-fired boilers.

    5. A price on carbon dioxide emissions will not cause the real change that is needed – the world should as far as possible stop digging up carbon and burning it into the sky. What fossil carbon that still enters energy systems should be recycled where possible, using Renewable Gas technologies, and any other carbon that enters the energy systems should be sourced from renewable resources such as biomass.

  • Shell Shirks Carbon Responsibility

    Posted on November 19th, 2014 Jo No comments

    I was in a meeting today held at the Centre for European Reform in which Shell’s Chief Financial Officer, Simon Henry, made two arguments to absolve the oil and gas industry of responsibility for climate change. He painted coal as the real enemy, and reiterated the longest hand-washing argument in politics – that Shell believes that a Cap and Trade system is the best way to suppress carbon dioxide emissions. In other words, it’s not up to Shell to do anything about carbon. He argued that for transportation and trade the world is going to continue to need highly energy-dense liquid fuels for some time, essentially arguing for the continuation of his company’s current product slate. He did mention proudly in comments after the meeting that Shell are the world’s largest bioethanol producers, in Brazil, but didn’t open up the book on the transition of his whole company to providing the world with low carbon fuels. He said that Shell wants to be a part of the global climate change treaty process, but he gave no indication of what Shell could bring to the table to the negotiations, apart from pushing for carbon trading. Mark Campanale of the Carbon Tracker Initiative was sufficiently convinced by the “we’re not coal” argument to attempt to seek common cause with Simon Henry after the main meeting. It would be useful to have allies in the oil and gas companies on climate change, but it always seems to be that the rest of the world has to adopt Shell’s and BP’s view on everything from policy to energy resources before they’ll play ball.

    During the meeting, Mark Campanale pointed out in questions that Deutsche Bank and Goldman Sachs are going to bring Indian coal to trade on the London Stock Exchange and that billions of dollars of coal stocks are to be traded in London, and that this undermines all climate change action. He said he wanted to understand Shell’s position, as the same shareholders that hold coal (shares), hold Shell. I think he was trying to get Simon Henry to call for a separation in investment focus – to show that investment in oil and gas is not the same as investing in Big Bad Coal. But Simon Henry did not bite. According to the Carbon Tracker Initiative’s report of 2013, Unburnable Carbon, coal listed on the London Stock Exchange is equivalent to 49 gigatonnes of Carbon Dioxide (gtCO2), but oil and gas combined trade shares for stocks equivalent to 64 gtCO2, so there’s currently more emissions represented by oil and gas on the LSX than there is for coal. In the future, the emissions held in the coal traded in London have the potential to amount to 165 gtCO2, and oil and gas combined at 125 gtCO2. Despite the fact that the United Kingdom is only responsible for about 1.6% of direct country carbon dioxide emissions (excluding emissions embedded in traded goods and services), the London Stock Exchange is set to be perhaps the world’s third largest exchange for emissions-causing fuels.

    Here’s a rough transcript of what Simon Henry said. There are no guarantees that this is verbatim, as my handwriting is worse than a GP’s.

    [Simon Henry] I’m going to break the habit of a lifetime and use notes. Building a long-term sustainable energy system – certain forces shaping that. 7 billion people will become 9 billion people – [many] moving from off-grid to on-grid. That will be driven by economic growth. Urbanisation [could offer the possibility of] reducing demand for energy. Most economic growth will be in developing economies. New ways fo consuming energy. Our scenarios – in none do we see energy not growing materially – even with efficiencies. The current ~200 billion barrels of oil equivalent per day today of energy demand will rise to ~400 boe/d by 2050 – 50% higher than today. This will be demand-driven – nothing to do with supply…

    [At least one positive-sounding grunt from the meeting – so there are some Peak Oil deniers in the room, then.]

    [Simon Henry] …What is paramount for governments – if a threat, then it gets to the top of the agenda. I don’t think anybody seriously disputes climate change…

    [A few raised eyebrows and quizzical looks around the table, including mine]

    [Simon Henry] …in the absence of ways we change the use of energy […] Any approach to climate change has got to embrace science, policy and technology. All three levers must be pulled. Need a long-term stable policy that enables technology development. We think this is best in a market mechanism. […] Energy must be affordable at the point of use. What we call Triple A – available, acceptable and affordable. No silver bullet. Develop in a responsible way. Too much of it is soundbite – that simplifies what’s not a simple problem. It’s not gas versus coal. [Although, that appeared to be one of his chief arguments – that it is gas versus coal – and this is why we should play nice with Shell.]

    1. Economy : About $1.5 to $2 trillion of new money must be invested in the energy industry each year, and this must be sustained until 2035 and beyond. A [few percent] of the world economy. It’s going to take time to make [massive changes]. […] “Better Growth : Better Climate” a report on “The New Climate Economy” by the Global Commission on the Economy and Climate, the Calderon Report. [The world invested] $700 billion last year on oil and gas [or rather, $1 trillion] and $220 – $230 billion on wind power and solar power. The Calderon Report showed that 70% of energy is urban. $6 trillion is being spent on urban infrastructure [each year]. $90 trillion is available. [Urban settings are] more compact, more connected, there’s public transport, [can build in efficiencies] as well as reducing final energy need. Land Use is the other important area – huge impact on carbon emissions. Urbanisation enables efficiency in distributed generation [Combined Heat and Power (CHP)], [local grids]. Eye-popping costs, but the money will be spent anyway. If it’s done right it will [significantly] reduce [carbon emissions and energy demand]…

    2. Technology Development : Governments are very bad at picking winners. Better to get the right incentives in and let the market players decide [optimisation]. They can intervene, for example by [supporting] Research and Development. But don’t specify the means to an end…The best solution is a strong predictable carbon price, at $40 a tonne or more or it won’t make any difference. We prefer Cap and Trade. Taxes don’t actually decrease carbon [emissions] but fundamentally add cost to the consumer. As oil prices rose [in 2008 – 2009] North Americans went to smaller cars…Drivers [set] their behaviour from [fuel] prices…

    [An important point to note here : one of the reasons why Americans used less motor oil during the “Derivatives Bubble” recession between 2006 and 2010 was because the economy was shot, so people lost their employment, and/or their homes and there was mass migration, so of course there was less commuter driving, less salesman driving, less business driving. This wasn’t just a response to higher oil prices, because the peak in driving miles happened before the main spike in oil prices. In addition, not much of the American fleet of cars overturned in this period, so Americans didn’t go to smaller cars as an adaptation response to high oil prices. They probably turned to smaller cars when buying new cars because they were cheaper. I think Simon Henry is rather mistaken on this. ]

    [Simon Henry] …As regards the Carbon Bubble : 65% of the Unburnable fossil fuels to meet the 2 degrees [Celsius] target is coal. People would stuggle to name the top five coal companies [although they find it easy to name the top five oil and gas companies]. Bearing in mind that you have to [continue to] transport stuff [you are going to need oil for some time to come.] Dealing with coal is the best way of moving forward. Coal is used for electricity – but there are better ways to make electricity – petcoke [petroleum coke – a residue from processing heavy and unconventional crude oil] for example…

    [The climate change impact of burning (or gasifying) petroleum coke for power generation is possibly worse than burning (or gasifying) hard coal (anthracite), especially if the pet coke is sourced from tar sands, as emissions are made in the production of the pet coke before it even gets combusted.]

    [Simon Henry] …It will take us 30 years to get away entirely from coal. Even if we used all the oil and gas, the 2 degrees [Celsius] target is still possible…

    3. Policy : We tested this with the Dutch Government recently – need to create an honest dialogue for a long-term perspective. Demand for energy needs to change. It’s not about supply…

    [Again, some “hear hears” from the room from the Peak Oil and Peak Natural Gas deniers]

    [Simon Henry] …it’s about demand. Our personal wish for [private] transport. [Not good to be] pushing the cost onto the big bad energy companies and their shareholders. It’s taxes or prices. [Politicians] must start to think of their children and not the next election…

    …On targets and subsidies : India, Indonesia, Brazil […] to move on fossil fuel subsidies – can’t break the Laws of Economics forever. If our American friends drove the same cars we do, they’d reduce their oil consumption equivalent to all of the shale [Shale Gas ? Or Shale Oil ?]… Targets are an emotive issue when trying to get agreement from 190 countries. Only a few players that really matter : USA, China, EU, India – close to 70% of current emissions and maybe more in future. The EPA [Environmental Protection Agency in the United States of America] [announcement] on power emissions. China responded in 24 hours. The EU target on 27% renewables is not [country-specific, uniform across-the-board]. Last week APEC US deal with China on emissions. They switched everything off [and banned traffic] and people saw blue sky. Coal with CCS [Carbon Capture and Storage] we see as a good idea. We would hope for a multi-party commitment [from the United Nations climate talks], but [shows doubt]… To close : a couple of words on Shell – have to do that. We have only 2% [of the energy market], but we [hope we] can punch above our weight [in policy discussions]. We’re now beginning to establish gas as a transport fuel. Brazil – low carbon [bio]fuels. Three large CCS projects in Canada, EU… We need to look at our own energy use – pretty trivial, but [also] look at helping our customers look at theirs. Working with the DRC [China]. Only by including companies such as ourselves in [climate and energy policy] debate can we get the [global deal] we aspire to…


    [Question from the table, Ed Wells (?), HSBC] : Green Bonds : how can they provide some of the finance [for climate change mitigation and adaptation] ? The first Renminbi denominated Green Bond from [?]. China has committed to non-fossil fuels. The G20 has just agreed the structure on infrastructure – important – not just for jobs and growth – parallel needs on climate change. [Us at HSBC…] Are people as excited about Green Bonds as we are ?

    [Stephen Tindale] Yes.

    [Question from the table, Anthony Cary, Commonwealth Scholarship Commission] …The key seems to be pricing carbon into the economy. You said you preferred Cap and Trade. I used to but despite reform the EU Emissions Trading Scheme (EU ETS) – [failures and] gaming the system. Tax seems to be a much more solid basis.

    [Simon Henry] [The problem with the ETS] too many credits and too many exemptions. Get rid of the exemptions. Bank reserve of credits to push the price up. Degress the number of credits [traded]. Tax : if people can afford it, they pay the tax, doesn’t stop emissions. In the US, no consumption tax, they are very sensitive to the oil price going up and down – 2 to 3 million barrels a day [swing] on 16 million barrels a day. All the political impact on the US from shale could be done in the same way on efficiency [fuel standards and smaller cars]. Green Bonds are not something on top of – investment should be financed by Green Bonds, but investment is already being done today – better to get policy right and then all investment directed.


    [Question from the table, Kirsten Gogan, Energy for Humanity] The role of nuclear power. By 2050, China will have 500 gigawatts (GW) of nuclear power. Electricity is key. Particularly coal. Germany is building new coal as removing nuclear…

    [My internal response] It’s at this point that my ability to swallow myths was lost. I felt like shouting, politely, across the table : ACTUALLY KIRSTEN, YOU, AND A LOT OF OTHER PEOPLE IN THE ROOM ARE JUST PLAIN WRONG ON GERMANY AND COAL.

    “Germany coal power generation at 10-year low in August”, 9th September 2014

    And the only new coal-fired plants being built are those that were planned up to five years ago. No new coal-fired capacity is now being agreed.

    [Kirsten Gogan]…German minister saying in public that you can’t phase out nuclear and coal at the same time. Nuclear is not included in that conversation. Need to work on policy to scale up nuclear to replace coal. Would it be useful to have a clear sectoral target on decarbonising – 100% on electricity ?

    [Stephen Tindale] Electricity is the least difficult of the energy sectors to decarbonise. Therefore the focus should be on electricity. If a target would help (I’m not a fan) nuclear certainly needs to be a part of the discussions. Angela Merkel post-Fukushima has been crazy, in my opinion. If want to boost renewable energy, nuclear power will take subsidies away from that. But targets for renewable energy is the wrong objective.. If the target is keeping the climate stable then it’s worth subsidising nuclear. Subsidising is the wrong word – “risk reduction”.

    [Simon Henry] If carbon was properly priced, nuclear would become economic by definition…


    [Simon Henry] …Basically, all German coal is exempted (from the EU ETS). If you have a proper market-based system then the right things will happen. The EU – hypocrisy at country level. Only [a couple of percent] of global emissions. The EU would matter if it was less hypocritical. China are more rational – long-term thinking. We worked with the DRC. Six differing carbon Cap and Trade schemes in operation to find the one that works best. They are effectively supporting renewable energy – add 15 GW each of wind and solar last year. They don’t listen to NIMBYs [they also build in the desert]. NIMBYism [reserved for] coal – because coal was built close to cities. [Relationship to Russia] – gas replacing coal. Not an accident. Five year plan. They believe in all solutions. Preferably Made in China so we can export to the rest of the world. [Their plans are for a range of aims] not just climate.


    [Simon Henry] [in answer to a question about the City of London] We don’t rely on them to support our activities [my job security depends on a good relationship with them]]. We have to be successful first and develop [technological opportunities] [versus being weakened by taxes]. They can support change in technology. Financing coal may well be new money. Why should the City fund new coal investments ?

    [Question from the table, asking about the “coal is 70% of the problem” message from Simon Henry] When you talk to the City investors, do you take the same message to the City ?

    [Simon Henry] How much of 2.7 trillion tonnes of “Unburnable Carbon” is coal, oil and gas ? Two thirds of carbon reserves is coal. [For economic growth and] transport you need high density liquid fuels. Could make from coal [but the emissions impact would be high]. We need civil society to have a more serious [understanding] of the challenges.

    After the discussion, I asked Simon Henry to clarify his words about the City of London.

    [Simon Henry] We don’t use the City as a source of capital. 90% is equity finance. We don’t go to the market to raise equity. For every dollar of profit, we invest 75 cents, and pay out 25 cents as dividend to our shareholders. Reduces [problems] if we can show we can reinvest. [ $12 billion a year is dividend. ]

    I asked if E&P [Exploration and Production] is working – if there are good returns on investment securing new reserves of fossil fuels – I know that the company aims for a 10 or 11 year Reserves to Production ratio (R/P) to ensure shareholder confidence.

    Simon Henry mentioned the price of oil. I asked if the oil price was the only determinant on the return on investment in new E&P ?

    [Simon Henry] If the oil price is $90 a barrel, that’s good. At $100 a barrel or $120 a barrel [there’s a much larger profit]. Our aim is to ensure we can survive at $70 a barrel. [On exploration] we still have a lot of things in play – not known if they are working yet… Going into the Arctic [At which point I said I hope we are not going into the Arctic]… [We are getting returns] Upstream is fine [supply of gas and oil]. Deepwater is fine. Big LNG [Liquefied Natural Gas] is fine. Shale is a challenge. Heavy Oil returns could be better – profitable, but… [On new E&P] Iraq, X-stan, [work in progress]. Downstream [refinery] has challenges on return. Future focus – gas and deepwater. [On profitability of investment – ] “Gas is fine. Deepwater is fine.”

    [My summary] So, in summary, I think all of this means that Shell believes that Cap and Trade is the way to control carbon, and that the Cap and Trade cost would be borne by their customers (in the form of higher bills for energy because of the costs of buying carbon credits), so their business will not be affected. Although a Cap and Trade market could possibly cap their own market and growth as the sales envelope for carbon would be fixed, since Shell are moving into lower carbon fuels – principally Natural Gas, their own business still has room for growth. They therefore support Cap and Trade because they believe it will not affect them. WHAT THEY DON’T APPEAR TO WANT PEOPLE TO ASK IS IF A CAP AND TRADE SYSTEM WILL ACTUALLY BE EFFECTIVE IN CURBING CARBON DIOXIDE EMISSIONS. They want to be at the negotiating table. They believe that they’re not the problem – coal is. They believe that the world will continue to need high energy-dense oil for transport for some time to come. It doesn’t matter if the oil market gets constrained by natural limits to expansion because they have gas to expand with. They don’t see a problem with E&P so they believe they can keep up their R/P and stay profitable and share prices can continue to rise. As long as the oil price stays above $70 a barrel, they’re OK.

    However, there was a hint in what Simon Henry talked about that all is not completely well in Petro-land.

    a. Downstream profit warning

    Almost in passing, Simon Henry admitted that downstream is potentially a challenge for maintaining returns on investment and profits. Downstream is petrorefinery and sales of the products. He didn’t say which end of the downstream was the issue, but oil consumption has recovered from the recent Big Dip recession, so that can’t be his problem – it must be in petrorefinery. There are a number of new regulations about fuel standards that are going to be more expensive to meet in terms of petroleum refinery – and the chemistry profiles of crude oils are changing over time – so that could also impact refinery costs.

    b. Carbon disposal problem

    The changing profile of crude oils being used for petrorefinery is bound to cause an excess of carbon to appear in material flows – and Simon Henry’s brief mention of petcoke is more significant than it may first appear. In future there may be way too much carbon to dispose of (petcoke is mostly carbon rejected by thermal processes to make fuels), and if Shell’s plan is to burn petcoke to make power as a solution to dispose of this carbon, then the carbon dioxide emissions profile of refineries is going to rise significantly… where’s the carbon responsiblity in that ?

  • Nigel Lawson : Unreferenced & Ill-Informed ?

    Posted on May 8th, 2014 Jo No comments

    An appeal was issued by David Andrews of the Claverton Energy Research Group, to respond to the Bath Lecture given by Nigel Lawson :-

    “Dear All, this group is not meant to be a mere venting of frustration and opinion at what is perceived to be poor policy. So what would be really useful is to have the Lawson spiel with the countering fact interspersed. I can then publish this on the Claverton web site which does get a lot of hits and appears to be quite influential. Can I therefore first thank Ed Sears for making a good effort, but ask him to copy his bits into the Lawson article at the appropriate point. Then circulate it and get others to add in bits. Otherwise these good thoughts will simply be lost in the wind. Dave”

    My reply of today :-

    “Dear Dave, I don’t have time at the moment to answer all of Nigel Lawson’s layman ruminations, but I have written a few comments here (see below) which begin to give vent to frustration typical of that which his tactics cause in the minds of people who have some acquaintance with the actual science. The sheer volume of his output suggests an attempt to filibuster proper debate rather than foster it. To make life more complicated to those who wish to answer his what I think are absurd notions, he gives no accurate references to his supposed facts or cites any accredited, peer-reviewed documentation that could back up his various emotive generalisations and what appear to be aspersions. Regards, jo.”

    Nigel Lawson: The Bath Lecture

    Climate Alarmism Is A Belief System And Needs To Be Evaluated As Such

    Nigel Lawson: Cool It

    Standpoint, May 2014

    This essay is based on the text of a speech given to the Institute for Sustainable Energy and the Environment at the University of Bath.

    There is something odd about the global warming debate — or the climate change debate, as we are now expected to call it, since global warming has for the time being come to a halt.

    [ : Contrary to what Nigel Lawson is claiming, there is no pause – global warming continues unabated. Of this there can be no doubt. All of the data that has been assessed – and there is a lot of it – confirms the theoretical framework – so it is odd that Nigel Lawson states otherwise, seemingly without any evidence to substantiate his assertion. Nigel Lawson appears to be taking advantage of fluctuations, or short-term wrinkles, in the records of air temperatures close to the Earth, to claim that up is down, dark is light and that truth is in error. Why are temperatures in the atmosphere close to the Earth’s surface, or “surface temperatures”, subject to variability ? Because heat can flow through matter, is the short answer. The longer answer is the interplay between the atmosphere and the oceans, where heat is being transfered between parts of the Earth system under conditions of flows such as the movement of air and water – what we call winds and ocean currents. There are detectable patterns in the flows of air and water – and some are oscillatory, so the temperature (taken at any one time) may appear to wriggle up and down (when viewed over a period of time). Despite these wobbles, the overall trend of temperature over several decades has been reliably detected. Despite Nigel Lawson’s attention to air temperatures, they are probably the least significant in detecting global warming, even though the data shows that baseline air temperatures, averaged over time, are rising. The vast proportion of heat being added to the Earth system is ending up in the oceans :-
    and the rise in ocean temperatures is consistent :-
    which indicates that circulatory patterns of heat exchange in the oceans have less effect on making temperatures fluctuate than the movement of masses of air in the atmosphere. This is exactly what you would expect from the study of basic physics. If you give only a cursory glance at the recent air temperatures at the surface of the Earth, you could think that temperatures have levelled off in the last decade or so, but taking a longer term view easily shows that global warming continues to be significant :-
    What is truly astonishing about this data is that the signal shows through the noise – that the trend in global warming is easily evident by eye, despite the wavy shakes from natural variability. For Nigel Lawson’s information, the reason why we refer to climate change is to attempt to encompass other evidence in this term besides purely temperature measurements. As the climate changes, rainfall patterns are altering, for example, which is not something that can be expressed in the term global warming. ]

    I have never shied away from controversy, nor — for example, as Chancellor — worried about being unpopular if I believed that what I was saying and doing was in the public interest.

    But I have never in my life experienced the extremes of personal hostility, vituperation and vilification which I — along with other dissenters, of course — have received for my views on global warming and global warming policies.

    For example, according to the Climate Change Secretary, Ed Davey, the global warming dissenters are, without exception, “wilfully ignorant” and in the view of the Prince of Wales we are “headless chickens”. Not that “dissenter” is a term they use. We are regularly referred to as “climate change deniers”, a phrase deliberately designed to echo “Holocaust denier” — as if questioning present policies and forecasts of the future is equivalent to casting malign doubt about a historical fact.

    [ : Climate change science is built on observations : all historical facts. Then, as in any valid science, a theoretical framework is applied to the data to check the theory – to make predictions of future change, and to validate them. It is an historical fact that the theoretical framework for global warming has not been falsified. The Earth system is warming – this cannot be denied. It seems to me that Nigel Lawwon usurps the truth with myth and unsubstantiated rumour, casting himself in the role of doubting dissenter, yet denying the evidence of the data. He therefore self-categorises as a denier, by the stance of denial that he takes. His denial is also an historical fact, but calling him a denier is not a value judgement. It is for each person to ascribe for themselves a moral value to the kind of denial he expresses. ]

    The heir to the throne and the minister are senior public figures, who watch their language. The abuse I received after appearing on the BBC’s Today programme last February was far less restrained. Both the BBC and I received an orchestrated barrage of complaints to the effect that it was an outrage that I was allowed to discuss the issue on the programme at all. And even the Science and Technology Committee of the House of Commons shamefully joined the chorus of those who seek to suppress debate.

    [ : Considering the general apathy of most television viewers, it is therefore quite refreshingly positive that so many people decided to complain about Nigel Lawson being given a platform to express his views about climate change, a subject about which it seems he is unqualified to speak with authority of learning. He may consider the complaints an “orchestrated barrage”. Another interpretation could be that the general mood of the audience ran counter to his contributions, and disagreed with the BBC’s decisiont to permit him to air his contrarian position, to the point of vexation. A parallel example could be the kind of outrage that could be expressed if Nigel Lawson were to deny that the Earth is approximately spherical, that gravity means that things actually move out to space rather than towards the ground, or that water is generally warmer than ice. He should expect opposition to his opinions if he is denying science. ]

    In fact, despite having written a thoroughly documented book about global warming more than five years ago, which happily became something of a bestseller, and having founded a think tank on the subject — the Global Warming Policy Foundation — the following year, and despite frequently being invited on Today to discuss economic issues, this was the first time I had ever been asked to discuss climate change. I strongly suspect it will also be the last time.

    The BBC received a well-organised deluge of complaints — some of them, inevitably, from those with a vested interest in renewable energy — accusing me, among other things, of being a geriatric retired politician and not a climate scientist, and so wholly unqualified to discuss the issue.

    [ : It is a mark of integrity to put you money where your mouth is, not an indicator on insincerity. It is natural to expect people who accept climate change science to be taking action on carbon dioxide emissions, which includes investment in renewable energy. ]

    Perhaps, in passing, I should address the frequent accusation from those who violently object to any challenge to any aspect of the prevailing climate change doctrine, that the Global Warming Policy Foundation’s non-disclosure of the names of our donors is proof that we are a thoroughly sinister organisation and a front for the fossil fuel industry.

    As I have pointed out on a number of occasions, the Foundation’s Board of Trustees decided, from the outset, that it would neither solicit nor accept any money from the energy industry or from anyone with a significant interest in the energy industry. And to those who are not-regrettably-prepared to accept my word, I would point out that among our trustees are a bishop of the Church of England, a former private secretary to the Queen, and a former head of the Civil Service. Anyone who imagines that we are all engaged in a conspiracy to lie is clearly in an advanced stage of paranoia.

    The reason why we do not reveal the names of our donors, who are private citizens of a philanthropic disposition, is in fact pretty obvious. Were we to do so, they, too, would be likely to be subject to the vilification and abuse I mentioned earlier. And that is something which, understandably, they can do without.

    That said, I must admit I am strongly tempted to agree that, since I am not a climate scientist, I should from now on remain silent on the subject — on the clear understanding, of course, that everyone else plays by the same rules. No more statements by Ed Davey, or indeed any other politician, including Ed Milliband, Lord Deben and Al Gore. Nothing more from the Prince of Wales, or from Lord Stern. What bliss!

    But of course this is not going to happen. Nor should it; for at bottom this is not a scientific issue. That is to say, the issue is not climate change but climate change alarmism, and the hugely damaging policies that are advocated, and in some cases put in place, in its name. And alarmism is a feature not of the physical world, which is what climate scientists study, but of human behaviour; the province, in other words, of economists, historians, sociologists, psychologists and — dare I say it — politicians.

    [ : Au contraire, I would say to Nigel Lawson. At root, climate change is very much a scientific issue. Science defines it, describes it and provides evidence for it. Climate change is an epistemological concern, and an ontological challenge. How we know what we know about climate change is by study of a very large number of results from data collection and other kinds of research. The evidence base is massive. The knowledge expressed in climate change science is empirical – based on observations – which is how we are sure that what we know is assured. There is still scope for uncertainty – will the surface temperatures rise by X plus or minus some Y, owing to the dynamic between the atmosphere, the oceans, the ice cover and the land masses ? The results of the IPCC assessments are that we pretty much know what X is, and we have an improved clarity on a range of values for Y. The more science is done, the clearer these numbers emerge. Knowledge increases as more science is done, which is why the IPCC assessments are making firmer conclusions as time passes. Climate change science does not make value judgements on its results. It concludes that sea levels are rising and will continue to rise; that rainfall patterns are changing and will continue to change; that temperatures are rising and will continue to rise under current economic conditions and the levels of fossil fuel use and land use. Science describes the outcomes of these and other climate changes. It is for us as human beings, with humanity in our hearts, to place a meaning on predicted outcomes such as crop and harvest failures, displacement of peoples, unliveable habitats, loss of plant and animal species, extreme weather. You cannot take the human out of the scientist. Of course scientists will experience alarm at the thought of these outcomes, just as the rest of society will do. The people should not be denied the right to feeling alarm. ]

    And en passant, the problem for dissenting politicians, and indeed for dissenting climate scientists for that matter, who certainly exist, is that dissent can be career-threatening. The advantage of being geriatric is that my career is behind me: there is nothing left to threaten.

    [ : Climate change science is not something you can “dissent” from if you are at all versed in it. For those who question any part of climate change science from inside the community of those who have appropriate knowledge and learning, their position is not one of dissent, but of being unable to assent completely to the conclusions of their peers. They lack a capacity to fully assent to the results of other people’s research because their own research indicates otherwise. As responsible members of the science community, they would then put their research conclusions and the research conclusions of others to the test. There is an integrity in this kind of questioning. It is a valid position, as long as the questions are posed in the language of scientific enquiry, and answered with scientific methods. For example, the Berkeley BEST team had questions about the evidence of global warming and set out to verify or falsify the results of others. Their own research led them to become convinced that their peers had been correct in the their conclusions. This is how science comes to consensus. Nigel Lawson should fund research in the field if he wishes to be taken seriously in denying the current consensus in climate change science. Instead of which, he invests in the publication of what appears to be uncorroborated hearsay and emotive politicking. ]

    But to return: the climate changes all the time, in different and unpredictable (certainly unpredicted) ways, and indeed often in different ways in different parts of the world. It always has done and no doubt it always will. The issue is whether that is a cause for alarm — and not just moderate alarm. According to the alarmists it is the greatest threat facing humankind today: far worse than any of the manifold evils we see around the globe which stem from what Pope called “man’s inhumanity to man”.

    [ : Nigel Lawson doesn’t need to tell anyone that weather is changeable and that climate changes. They can see it for themselves if they care to study the data. Climate change science has discovered that the current changes in the climate are unprecedented within at least the last 800,000 years. No previous period of rapid climate change in that era has been entirely similar to the changes we are experiencing today. This is definite cause for alarm, high level alarm, and not moderate. If there is a fire, it is natural to sound the alarm. If there is a pandemic, people spread the news. If there is a risk, as human beings, we take collective measures to avoid the threat. This is normal human precautionary behaviour. It is unreasonable for Nigel Lawson to insist that alarm is not an appropriate response to what is patently in the process of happening. ]

    Climate change alarmism is a belief system, and needs to be evaluated as such.

    [ : Belief in gravity, or thinking that protein is good to eat are also belief systems. Everything we accept as normal and true is part of our own belief system. For example, I believe that Nigel Lawson is misguided and has come to the wrong conclusions. The evidence lies before me. Is my opinion to be disregarded because I have a belief that Nigel Lawson is incorrect ? ]

    There is, indeed, an accepted scientific theory which I do not dispute and which, the alarmists claim, justifies their belief and their alarm.

    This is the so-called greenhouse effect: the fact that the earth’s atmosphere contains so-called greenhouse gases (of which water vapour is overwhelmingly the most important, but carbon dioxide is another) which, in effect, trap some of the heat we receive from the sun and prevent it from bouncing back into space.

    Without the greenhouse effect, the planet would be so cold as to be uninhabitable. But, by burning fossil fuels — coal, oil and gas — we are increasing the amount of carbon dioxide in the atmosphere and thus, other things being equal, increasing the earth’s temperature.

    But four questions immediately arise, all of which need to be addressed, coolly and rationally.

    First, other things being equal, how much can increased atmospheric CO2 be expected to warm the earth? (This is known to scientists as climate sensitivity, or sometimes the climate sensitivity of carbon.) This is highly uncertain, not least because clouds have an important role to play, and the science of clouds is little understood. Until recently, the majority opinion among climate scientists had been that clouds greatly amplify the basic greenhouse effect. But there is a significant minority, including some of the most eminent climate scientists, who strongly dispute this.

    [ : Simple gas chemistry and physics that is at least a century old is evidence that carbon dioxide allows sunlight to pass right through to warm the Earth, which then emits infrared light because it has warmed up. When the infrared radiation is emitted, the Earth cools down. Infrared is partially blocked by carbon dioxide, which absorbs it, then re-radiates it, partially back to the Earth, which warms up again. Eventually, the warming radiation will escape the carbon dioxide blanket, but because of this trapping effect, the net result is for more heat to remain in the atmosphere close to the Earth’s surface than you would expect. This is the main reason why the temperature of the Earth’s surface is warmer than space. As carbon dioxide accumulates in the atmosphere, the warming effect will be enhanced. This is global warming and it is undisputed by the overwhelming majority of scientists. Climate sensitivity, or Equilibrium Climate Sensitivity (ECS) is a calculated measure of the total temperature change that would be experienced (after some time) at the surface of the Earth for a doubling of atmospheric carbon dioxide concentrations compare to the pre-industrial age. The Transient Climate Response (TCR) is a measure of the temperature change that would be experienced in the shorter-term for a doubling of atmospheric carbon dioxide concentrations. The TCR can be easily calculated from basic physics. The shorter-term warming will cause climate change. Some of the changes will act to cool the Earth down from the TCR (negative feedbacks). Some of the changes will act to heat the Earth up from the TCR (positive feedbacks). These are some disagreements about the ECS, such as the net effects from the fertilisation effect of carbon dioxide on plant growth, the net effects of changes in weather and cloud systems, and the net effects of changes in ocean and atmospheric circulation. However, evidence from the deep past (paleoclimatology) is helping to determine the range of temperatures that ECS could be. ]

    Second, are other things equal, anyway? We know that, over millennia, the temperature of the earth has varied a great deal, long before the arrival of fossil fuels. To take only the past thousand years, a thousand years ago we were benefiting from the so-called medieval warm period, when temperatures are thought to have been at least as warm, if not warmer, than they are today. And during the Baroque era we were grimly suffering the cold of the so-called Little Ice Age, when the Thames frequently froze in winter and substantial ice fairs were held on it, which have been immortalised in contemporary prints.

    [ : The Medieval Warming Period (or Medieval Warm Period) was just a blip compared to the current global warming of the last 150 years. And the Little Ice Age was also a minor anomaly, being pretty much confined to the region of Europe, and some expect could have become the Rather Much Longer Icy Period had it not been for the use of fossil fuels, which warmed Europe up again. Burning coal and other fossil fuels releases carbon that would have originally been in the atmosphere in the form of carbon dioxide millions of years ago, that trees and other plants used to grow. Geological evidence shows that surface temperatures at those times were warmer than today. ]

    Third, even if the earth were to warm, so far from this necessarily being a cause for alarm, does it matter? It would, after all, be surprising if the planet were on a happy but precarious temperature knife-edge, from which any change in either direction would be a major disaster. In fact, we know that, if there were to be any future warming (and for the reasons already given, “if” is correct) there would be both benefits and what the economists call disbenefits. I shall discuss later where the balance might lie.

    [ : The evidence from the global warming that we have experienced so far since around 1880 is almost universally limiting in terms of the ability of species of animals and plants to survive. There are tiny gems of positive outcomes, compared to a sand pit of negatives. Yes, of course it matters. The mathematics of chaos with strong perturbations to any system do not permit it to coast on a precarious knife-edge for very long. Sooner or later there will be a major alteration, and the potential for some milder probable outcomes will collapse. ]

    And fourth, to the extent that there is a problem, what should we, calmly and rationally, do about it?

    [ : The most calm and rational thing to do is to compile all the evidence and report on it. Oh yes, we’ve already done that. It’s called the Intergovernmental Panel on Climate Change or IPCC. The concluisons of the compilation of over 100 years of science is that global warming is real, and it’s happening now, and that there is a wide range of evidence for climate change, and indicators that it is a major problem, and that we have caused it, through using fossil fuels and changing how we use land. ]

    It is probably best to take the first two questions together.

    According to the temperature records kept by the UK Met Office (and other series are much the same), over the past 150 years (that is, from the very beginnings of the Industrial Revolution), mean global temperature has increased by a little under a degree centigrade — according to the Met Office, 0.8ºC. This has happened in fits and starts, which are not fully understood. To begin with, to the extent that anyone noticed it, it was seen as a welcome and natural recovery from the rigours of the Little Ice Age. But the great bulk of it — 0.5ºC out of the 0.8ºC — occurred during the last quarter of the 20th century. It was then that global warming alarmism was born.

    [ : Nigel Lawson calls it “alarmism”. I call it empirical science. And there are many scientific explanations for what he calls “fits and starts”, it’s just that they’re written in research papers, so he will probably never read them, going on his lack of attention to research publications in the past. ]

    But since then, and wholly contrary to the expectations of the overwhelming majority of climate scientists, who confidently predicted that global warming would not merely continue but would accelerate, given the unprecedented growth of global carbon emissions, as China’s coal-based economy has grown by leaps and bounds, there has been no further warming at all. To be precise, the latest report of the Intergovernmental Panel on Climate Change (IPCC), a deeply flawed body whose non-scientist chairman is a committed climate alarmist, reckons that global warming has latterly been occurring at the rate of — wait for it — 0.05ºC per decade, plus or minus 0.1ºC. Their figures, not mine. In other words, the observed rate of warming is less than the margin of error.

    [ : It is not valid for Nigel Lawson to claim that there has been “no further warming at all”. Heat accumulation continues to be documented. Where is Nigel Lawson’s evidence to support his claim that the IPCC is a “deeply flawed body” ? Or is that another one of his entirely unsubstantiated dismissals of science ? Does he just fudge the facts, gloss over the details, pour scorn on scientists, impugn the academies of science, play with semantics, stir up antipathy, wave his hands and the whole history of science suddenly vanishes in a puff of dismissive smoke ? I doubt it ! Nigel Lawson says “the observed rate of warming is less than the margin of error.” This is ridiculous, because temperature is not something that you can add or subtract, like bags of sugar, or baskets of apples, or Pounds Sterling to the Global Warming Policy Foundation’s public relations fund. Two degrees Celsius, or Centigrade, is not twice as warm as one degree Celsius. 30 degrees C doesn’t indicate twice as much heat as 15 degrees C, or require twice as much heating. The range of figures that Nigel Lawson is quoting, minus 0.05 degrees C plus or minus 0.1 degrees C, that is, somewhere between a cooling of 0.05 degrees C and a warming of 0.15 degrees C, is a calculation of temperature trends averaged over the whole Earth’s surface for the last 15 years :- (Box 9.2)
    It is not surprising that over such a short timescale it might appear that the Earth as experienced a mild cooling effect. In the last 15 years there have been a couple of years far hotter than average, and these spike the calculated trend. For example, 1998 was much hotter than the years before or after it, so if you were just to compare 1998 with 2008, it would look like the Earth is cooling down. But who would be foolish enough to look at just two calendar years of the data record on which to base their argument ? The last 15 years have to be taken in context. In “Climate Change 2013 : The Physical Science Basis”, the IPCC report from Working Group 1, in the Summary for Policymakers, page 5, Section B1, the IPCC write :-
    “In addition to robust multi-decadal warming, global mean surface temperature exhibits substantial decadal and interannual variability […] Due to natural variability, trends based on short records are very sensitive to the beginning and end dates and do not in general reflect long-term climate trends. As one example, the rate of warming over the past 15 years (1998–2012; 0.05 [–0.05 to 0.15] °C per decade), which begins with a strong El Niño, is smaller than the rate calculated since 1951 (1951–2012; 0.12 [0.08 to 0.14] °C per decade).” (El Niño is a prominent pattern of winds and ocean currents in the Pacific Ocean with two main states – one that tends to produce a warming effect on the Earth’s surface temperatures, and the other, La Niña, which has a general cooling effect.) ] In other words, in the last fifteen years, the range of rate of change of temperature is calculated to be somewhere between the surface of the planet cooling by 0.05 degrees Centigrade, up to warming by 0.15 degrees Centigrade :-
    However, this calculation of a trend line does not take account of three things. First, in the last decade or so, the variability of individual years could mask a trend, but relative to the last 50 years, everything is clearly hotter on average. Secondly, temperature is not a “discrete” quantity, it is a continuous field of effect, and it is going to have different values depending on location and time. The temperature for any January to December is only going to be an average of averages. If you were to measure the year from March to February instead, the average of averages could look different, because of the natural variability. Thirdly, there are lots of causes for local and regional temperature variability, all concurrent, so it is not until some time after a set of measurements has been taken, and other sets of measurements have been done, that it is possible to determine that a substantial change has taken place. ]

    And that margin of error, it must be said, is implausibly small. After all, calculating mean global temperature from the records of weather stations and maritime observations around the world, of varying quality, is a pretty heroic task in the first place. Not to mention the fact that there is a considerable difference between daytime and night-time temperatures. In any event, to produce a figure accurate to hundredths of a degree is palpably absurd.

    [ : Nigel Lawson could be said to mislead in his explanation of what “a figure accurate to hundredths of a degree” implies. Temperature is measured on an arbitrarily decided scale. To raise the whole of the Earth surface temperatures by 1 degree Celsius requires a lot of extra trapped energy. The surface temperature of the Earth is increasing by the absorption of energy that amounts roughly to 2 trillion Hiroshima atombic bombs since 1998, or 4 Hiroshimas a second. That is not a small number, although it has to be seen in the full context of the energy flows in and out of the Earth system :-
    Nigel Lawson credits the global temperature monitoring exercise as “heroic”, but then berates its quality. However, climate change scientists do already appreciate that there are differences between daytime and nighttime temperatures – it is called the diurnal range. Besides differences between years, it is known that there are also differences between seasons, and latitudes, and climatic zones. Scientists are not claiming an absolute single value for the temperature of the Earth, accurate to within hundredths of a degree – that’s why they always give a margin of error. What is astonishing from reviews of the data is something that Nigel Lawson has completely missed. Global warming appears to have fractal resolution – that is – at whatever geographical scale you resolve the data, the trend in most cases appears to be similar. If you take a look at some of the websites offering graphs, for example :-
    the global warming trend is seen to be generally similar when averaged locally, regionally or at the global scale. This is an indicator that the global warming signal is properly being detected, as these trend lines are more or less what you would expect from basic physics and chemistry – the more carbon dioxide in the air, the more heat gets trapped, and the rate of carbon dioxide accumulation in the atmosphere has seen similar trendlines :- ]

    The lessons of the unpredicted 15-year global temperature standstill (or hiatus as the IPCC calls it) are clear. In the first place, the so-called Integrated Assessment Models which the climate science community uses to predict the global temperature increase which is likely to occur over the next 100 years are almost certainly mistaken, in that climate sensitivity is almost certainly significantly less than they once thought, and thus the models exaggerate the likely temperature rise over the next hundred years.

    [ : I repeat : there is no pause. The IPCC are not claiming that global warming has stopped, only that there is an apparent “hiatus” in global surface temperature averages. Some scientists have concluded from their work that Climate Sensitivity is less than once feared. However, Climate Sensitivity is calculated for an immediate, once-only doubling of carbon dioxide in the atmosphere, whereas the reality is that carbon dioxide is continuing to build up in the atmosphere, and if emissions continue unabated, there could be a tripling or quadrupling of carbon dioxide concentrations in the atmosphere, which would mean that you would need to multiply the Climate Sensitivity by 1.5 or 2 to arrive at the final top temperature – higher than previously calculated, regardless of whether the expected Climate Sensitivity were to be less than previously calculated. It is therefore illogical for Nigel Lawson to extrapolate from his understanding that Climate Sensitivity is lower than previously calculated to his conclusion that the final level of global warming will be lower than previously calculated. The more carbon dioxide we emit, the worse it will be. ]

    But the need for a rethink does not stop there. As the noted climate scientist Professor Judith Curry, chair of the School of Earth and Atmospheric Sciences at the Georgia Institute of Technology, recently observed in written testimony to the US Senate:
    “Anthropogenic global warming is a proposed theory whose basic mechnism is well understood, but whose magnitude is highly uncertain. The growing evidence that climate models are too sensitive to CO2 has implications for the attribution of late-20th-century warming and projections of 21st-century climate. If the recent warming hiatus is caused by natural variability, then this raises the question as to what extent the warming between 1975 and 2000 can also be explained by natural climate variability.”

    [ : The IPCC reports constitute the world’s best attempts to “rethink” Climate Change. Professor Judith Curry, in the quotation given by Nigel Lawson, undervalues a great deal of her colleagues’ work by dismissing their valid attribution of Climate Change to the burning of fossil fuels and the change in land use. ]

    It is true that most members of the climate science establishment are reluctant to accept this, and argue that the missing heat has for the time being gone into the (very cold) ocean depths, only to be released later. This is, however, highly conjectural. Assessing the mean global temperature of the ocean depths is — unsurprisingly — even less reliable, by a long way, than the surface temperature record. And in any event most scientists reckon that it will take thousands of years for this “missing heat” to be released to the surface.

    [ : That the oceans are warming is not conjecture – it is a statement based on data. The oceans have a far greater capacity for heat retention than the atmosphere, so yes, it will take a long time for heat in the oceans to re-emerge into the atmosphere. However, the processes that directed heat into the oceans rather than the atmosphere in recent years could easily reverse, and in a short space of time the atmosphere could heat up considerably. In making his arguments, Nigel Lawson omits to consider this eventuality, which lowers considerably the value of his conclusions. ]

    In short, the CO2 effect on the earth’s temperature is probably less than was previously thought, and other things — that is, natural variability and possibly solar influences — are relatively more significant than has hitherto been assumed.

    [ : Nothing about science has changed. The Earth system continues to accumulate heat and respond to that. Carbon dioxide still contributes to the Greenhouse Effect, and extra carbon dioxide in the air will cause further global warming. The Transient Climate Response to carbon dioxide is still apparently linear. The Equilibrium Climate Sensitivity is still calculated to be roughly what it always has been – but that’s only for a doubling of atmospheric carbon dioxide. If more methane is emitted as a result of Arctic warming, for example, or the rate of fossil fuel use increases, then the temperature increase of the Earth’s surface could be more than previously thought. Natural variability and solar changes are all considered in the IPCC reports, and all calculations and models take account of them. However, the obvious possibility presents itself – that the patterns of natural variability as experienced by the Earth during the last 800,000 years are themseles being changed. If Climate Change is happening so quickly as to affect natural variability, then the outcomes could be much more serious than anticipated. ]

    But let us assume that the global temperature hiatus does, at some point, come to an end, and a modest degree of global warming resumes. How much does this matter?

    The answer must be that it matters very little. There are plainly both advantages and disadvantages from a warmer temperature, and these will vary from region to region depending to some extent on the existing temperature in the region concerned. And it is helpful in this context that the climate scientists believe that the global warming they expect from increased atmospheric CO2 will be greatest in the cold polar regions and least in the warm tropical regions, and will be greater at night than in the day, and greater in winter than in summer. Be that as it may, studies have clearly shown that, overall, the warming that the climate models are now predicting for most of this century (I referred to these models earlier, and will come back to them later) is likely to do more good than harm.

    [ : The claim that warming will “overall […] do more good than harm” is erroneous, according to Climate Change Science. ]

    Global warming orthodoxy is not merely irrational. It is wicked.

    [ : My conclusions upon reading this lecture are that the evidence suggests that Nigel Lawson’s position is ill-informed. He should read the IPCC reports and re-consider. ]

  • Making The Sour Sweet

    Posted on January 1st, 2014 Jo No comments

    In the long view, some things are inevitable, and I don’t just mean death and taxes. Within the lifetime of children born today, there must be a complete transformation in energy. The future is renewable, and carefully deployed renewable energy systems can be reliable, sustainable and low cost, besides being low in carbon dioxide emissions to air. This climate safety response is also the answer to a degradation and decline in high quality mineral hydrocarbons – the so-called “fossil” fuels. Over the course of 2014 I shall be writing about Renewable Gas – sustainable, low emissions gas fuels made on the surface of the earth without recourse to mining for energy. Renewable Gas can store the energy from currently underused Renewable Electricity from major producers such as wind and solar farms, and help to balance out power we capture from the variable wind and sun. Key chemical players in these fuels : hydrogen, methane, carbon monoxide and carbon dioxide. Key chemistry : how to use hydrogen to recycle the carbon oxides to methane. How we get from here to there is incredibly important, and interestingly, methods and techniques for increasing the production volumes of Renewable Gas will be useful for the gradually fading fossil fuel industry. Much of the world’s remaining easily accessible Natural Gas is “sour” – laced with high concentrations of hydrogen sulfide and carbon dioxide. Hydrogen sulfide needs to be removed from the gas, but carbon dioxide can be recycled into methane, raising the quality of the gas. We can preserve the Arctic from fossil gas exploitation, and save ourselves from this economic burden and ecological risk, by employing relatively cheap ways to upgrade sour Natural Gas, from Iran, for example, while we are on the decades-long road of transitioning to Renewable Gas. The new burn is coming.

  • Cold Ground : Hot Sky

    Posted on October 5th, 2012 Jo No comments

    Something bizarre is happening in the sky, 4,000 metres above our heads. It’s getting unusually warm.

    While we’ve been busy thanking Gaia that the surface temperatures in Greenland have dropped to ice-sustaining levels, we’ve taken our eyes off the rest of the Earth system.

    Cold ground. But hot sky.

    I suppose the key question is whether this heat burden will be circulated back around to ground level before the depths of Winter – in which case, it might defer the re-formation of the Arctic Sea Ice.

    Is it possible that at the same time as the Arctic Ocean is free of sea ice in Summer, that it’s significantly curtailed in Winter, too ?

    Is this the onset of a “new climate state” ?