Climate Letter #825

How human population has grown since its beginning.  This is a YouTube presentation produced by the American Historical Society, progressively mapping distribution as well as totals.  Absolutely fascinating.

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A carbon countdown clock that measures what remains of the carbon budget under various scenarios.  This neat gadget gives you all the important numbers in real time.  Under one assumption the 1.5C target is already in the red, but if all goes well we still have over 23 years to save the Earth from going above 2C.  The discussion that follows is pretty straightforward about the magnitude of the task at hand.
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How warming seas are forcing fish to migrate.  This lengthy discussion written for the Guardian includes many quotes from marine biologists.  In addition to the effects of climate change other issues affecting the welfare of fish stocks are also recognized.
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An update from Greenpeace on China’s energy transition.  Greenpeace is hard to please on matters like this, but has high regard for the speed with which the transition is happening.  Plans and targets keep being beaten by a wide margin.
More on this subject from Reuters:
(There is no better reason than this for being optimistic on a larger scale, depending in addition on how well China adapts to its new role as sole leader of the international program that was started in Paris.)
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Meanwhile, in other parts of the world, there is a different kind of story that requires attention.  This is Joe Romm’s interpretation of what may be happening between two other world powers, the accuracy of which can be questioned, and with much left to be told.  I think all climate scientists, not just Romm, are interested and wary.
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Scientific debate over the future of AMOC, or the Gulf Stream, is updated with fresh information (The Atlantic).  There are no final conclusions ready to be drawn, but the new arguments buttress the idea that the risk of a breakdown is real as the current climate trajectory unfolds.
Carl

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