Climate Letter #661

La Nina will soon be in the news.  This post will give you some idea of what to expect, and the contrast with El Nino.  After a run of record high monthly temperatures for twelve straight months we should get a lot of relief on that end.  Patterns of drought will be shifting, and hurricanes are likely to return to the Atlantic.  Almost every part of the globe will see changes of some kind.

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For an interesting view, go to the Climate Reanalyzer at
and click on Sea Surface T Anomaly.  Scroll down to the global view and notice the narrow ribbon of relatively cold water in the Pacific right on the equator, which is a sure sign of the ongoing change.  While you are there take a good look at how the ocean water has cooled in the region around the Antarctic Peninsula.  That is now a permanent feature, caused by cold glacial meltwater that won’t sink because of its lack of salinity.  Currents are carrying it from west to east, and because there is so much of it the anomaly effect is widespread.  In fact almost the entire Southern Ocean is affected.  It is mainly due to warm subsurface ocean water that is melting shelf and glacier ice from the underside along the edges of the continent.  If this were not going on the average global air temperature would actually be a little higher than it is, offset by deep ocean water staying a little warmer (!)
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New research report on Antarctica’s Totten Glacier.  This study confirms previous studies showing how processes of instability are now at work, along with clues to how the same type of thing occurred on numerous occasions in the distant past.  There is a neat map included which shows that the size of the catchment area of the glacier is about equal  to that of Texas plus Oklahoma.
Here is some more information about the Totten troubles, with extra video backup:
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A story about the role of agriculture in climate change, and the difficulties involved in dealing with it.  Adding in the effects of methane and nitrous oxide emissions, agriculture accounts for about one-third of all of humanity’s greenhouse gas impact.
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How to deal with rising sea level.  The people in Holland have been doing it for a long time, with massive barriers of remarkable effectiveness.  Their knowledge will be put to good use in many other places.  One is left wondering where the limits to size might finally come into play.
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That big Alberta fire is still raging, almost uncontained apart from the hope of possible rains today.  It has destroyed about 1400 square miles so far.
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A perfect example of a government that has been bought by oil and gas interests.  They are not always this extreme, but the same kind of influence or temptation is felt by practically every sizeable government.
Carl

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