Some reasons to be hopeful about climate change. From Peter Dykstra, a veteran observer. All seven of his points are meaningful. He might have said a little more about the dramatic nature of the changes that seem to be taking hold in China.
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One attitude that badly needs changing has hardly budged. That is the 2C “safe limit” for global average temperature rise. One of the lead authors of the last IPCC report—who should know the facts as well as anyone—thinks 2C is too high, and gives some good reasons. For example, “But not only does it inadequately capture the complexity of the climate system, it poorly reflects locally experienced temperature increases and the extreme and large variation across regions – no single person or any species faces a global average.” Lots more in the post. Also, a UN report due in June will be reviewing the propriety of this number.
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Another new study about the behavior of Antarctica’s ice shelves. This one mainly adds to our knowledge about how rapidly the thickness of the ice has been diminishing for many of the shelves, based on an 18-year study. The post covers the whole subject very well, with graphics, cause and effect, and some high level opinions. The recent Totten Glacier revelations are not incorporated into the study but should fit right in, bringing a new sort of focus on what to expect in East Antarctica.
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A look at what vertical ocean currents (or eddies) can do. This story is mostly concerned with the carbon cycle, adding to our knowledge of how so much carbon gets delivered into the ocean depths. I also want to point out that these same eddies must also be transporting heat from the ocean surface to those same depths, a subject that has been in need of better explanation and is very much relevant to climatic outcomes.
Carl