Climate Letter #1214

Posted on July 16, 2018 by Carl Campbell
How heat records are falling around the world this year (Weather Underground).  Christopher Burt is very likely the world’s leading historian of record-setting weather conditions.  This list has plenty to offer.

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From Scientific American, an explanation for the weird outburst of extreme July heat and humidity along the coast of California.  The story includes an interesting graphic from the NOAA showing the average date of the highest summer temperature in all parts of the lower 48 states, which actually ranges from early June through late September.
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The United Nations has approved a non-binding agreement aiming to make mass migrations safer and more orderly.  (The vote was unanimous with one notable exception.)  Currently, “Some 250 million people around the world are migrants, according to U.N. data, or 3.4 percent of the global population,” ascribed to many different reasons.  One of the most feared consequences of climate change is the combination of a sharp and steady rise in that number and the rise of factions that resist their entrance into the places that are able to take them in.
–For Americans, this story provides evidence that the problem is close to home:
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While the US is making headlines switching its historical alliances, the EU may already have found a strong new partner in China.  The number one basis for cooperation lies in the fact that both parties have a strong interest in reducing their dependence on fossil fuel energy and of gaining the benefits of a more mild future climate.  What this latest rapprochement can lead to is far from clear at the moment.  “The climate statement, as the only annex to a memorandum on a wide range of bilateral issues, places global warming at the centre of the complex, often fraught EU-China relationship…..could fill a vacuum left by Trump.”
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The role of natural gas as a “bridge” to a sustainable energy future is being shortened (Vox).  David Roberts has done thorough research on this subject and concludes that the gas producers are in a weak position, which is good for the environment.
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A new study forecasts a future decline in the capacity of an important carbon sink.  The sink was facilitated by the recovery of massive sections of North American forests that had been decimated prior to the twentieth century, a recovery that is nearing completion.  To quote from the study, “Because such a strong sink of North American forest biomass (offset > 10% of current CO2 emissions) is shown to be limited, future CO2 emission targets might need to be lowered.”  That is another one of those previously unrecognized devilish impacts on the carbon budget needed to meet the Paris targets.
Carl

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