Climate Letter #1196

James Hansen speaks out, in an interview with The Guardian.  This is a fine article about the most highly publicized climate scientist of our time.  He has done outstanding work in pure science, often as a pioneer, but also stands out for his willingness to express deep personal feelings and to engage in various activist causes, which in both cases most other scientists strenuously avoid.  Also, there are not many who share his enthusiasm for nuclear power.  The comments by Naomi Oreskes near the end that portray him as a tragic hero are well taken.

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–Also, at the very end there are some comments by another very senior scientist, Michael Oppenheimer, that are worthy of note.  In brief, he says once the amount of suffering from climate change becomes unconscionable the effort to deal with the problem will no longer be held back like it is today, but when will that be?
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Here is another story about the research that shows how climate change, while unfavorable to yields, is also sucking the nutritional value out of many staple foods.  How and when the effects will become apparent is perhaps beyond all reckoning at this moment but certainly the potential problems deserve more attention.
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All 28 European nations are ranked according to their current efforts to meet the Paris climate goals.  This analysis shows that only a few are living up to their promises or responsibilities.
–Governments can always come up with a good excuse.  The favorite:  “Very few people elect their governments for promising particularly ambitious climate policy… we need strong economies.”
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Joe Romm has found some interesting statistics on how property values are now being affected by their perceived flooding risks.  The data was collected not just along coasts but from the study of home prices in 3400 US cities.  It is not a good sign for coastal properties, which are more likely to face a complete erasure of all value at some point.
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A paper published in 2016 could affect the next IPCC forecast of future climate change.   The paper provides solid evidence that a doubling of CO2 content in the atmosphere would raise the average global temperature by about 4C, which is a full degree greater than most common assumptions that are based on other methods.  The difference is accounted for entirely by evaluating changes observed in strategic low cloud cover when surfaces below become warmer, making it a robust type of positive feedback to the warming mainly caused by greenhouse gases.  The work has been cited by 21 other papers, five of them just this year, which can be checked for authorship and favorability.  (I am going to follow up on this and other cloud cover studies in these letters because of its obvious significance.)
–Here is a link to the paper, which has open access.  All of the references that were used as a basis are listed as well as a link to the full list of citations that followed.
Carl

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