Climate Letter #483

Posted on September 9, 2015 by Carl Campbell
Atmospheric average CO2 level report for August.  The month-to-month comparison dropped back to a less than 2 ppm gain from last year, a welcome sign that there is still no acceleration of the major trend.  At this point going below 2 and staying there would require some sort of global economic recession, which is not at all out of the question, followed by a more determined level of emissions policy changes being put into effect, which is showing a few signs of life.

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A look at the severity of drought conditions across much of Europe and parts of Western Asia.  The causes are of a type that lead to forecasts of more of the same extending this year and in future years as well.
China is quietly moving toward a leadership role in the push for climate action.  The biggest and fastest-growing emitter shows more and more signs of a total reversal, not just to improve local air quality but to help engineer a rescue of the global climate.  A year or so ago that would have been unthinkable.
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A quick animated video, very well made, showing just how greenhouse gases do what they do at the molecular level.
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A new study revealing some details of the carbon cycle.  This provides one of the interesting ways that cold ocean water helps to deliver large amounts of carbon from the surface to lower depths where it can be sequestered.  Warming of those waters slows the effect.
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Hydrogen is still very much in the renewable energy game as technology advances.  One big advantage of hydrogen is that once it is produced there is no problem with storage flexibility.
Carl

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