An interesting theory about the cause of rapid ice sheet disintegration. The theory was developed as a way of explaining such occurrences in the past, known as Heinrich events. Today it is said to have direct application to the ice sheets of Greenland and parts of Antarctica. How the heavy weight of full-grown ice sheets slowly depresses the land below is one factor. A fairly modest warming of ocean water temperature can then furnish the amount of melting around the exposed lower parts of the ice edges that is needed to kick start a process of rapid breakdown.
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Ice shelves are also cracking and breaking at a rapid rate. Another big chunk in front of Pine Island has just broken away while we are waiting for a much bigger one at Larsen C. This post has a clear picture taken from the sky. The process that is involved is different from that in the above story because shelves are always floating and never become thick the way the sheets do. Still, their presence helps to hold back and protect the glaciers that form along the edges of the sheets.
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The ocean’s oxygen content has decreased more than two percent over the last 50 years. This has been determined through comprehensive studies of all available data. Warmer waters may not be the complete explanation but are known to have that effect in two different ways. The process creates a risk for many forms of marine life, large fishes in particular.
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Should Scott Pruitt be head of the EPA? The Atlantic magazine provides a detailed examination of his qualifications. There is a Republican bill to eliminate the EPA, which Trump, as a way of compromising with environmentalists, will surely oppose, while getting a few “reforms” in place as part of the bargain. I predict that the same approach will be taken with the Paris Agreement.
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Many large American corporations have policies that are environmentally friendly, yet glaringly weak when it comes to political action. The fossil fuel lobby, which is far more experienced and organized, has that field all to itself, and it shows. Marc Gunther provides a detailed explanation for Yale E360. He believes business leaders who understand the importance of climate policy will ultimately become more vocal, but there isn’t much time.
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The Parliament of the European Union is also involved in favoring actions that are inexcusable with respect to being serious about meeting climate goals. The latest deal, if completed, would be beneficial to the long-term health of the Canadian tar sands industry along with other immediate economic benefits that are, as is so often the case, considered more important than longer-term environmental concerns.
Carl