Climate Letter #1621

Australia’s fires were far worse than anything that had been predicted (BBC News).  “Climate models – simulations that use all available information about what drives our planet’s climate – are the primary method we have to understand what will happen as Earth warms…..But even if you look at the few models that have fire in them…none of them simulate anything close to the scale of what happened in Australia…..The faster [the planet] warms, the more likely we are to be taken by surprise.”  Similar observations have come to light following many other kinds of extreme weather events, noted here as “a wake-up call to the reality of climate change.”  
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A third of plants and animals risk mass extinction within fifty years (Climate News Network).  The underlying study was covered here before, in CL #1615 on Feb. 15, but needs to be repeated because of its profound importance and depth of investigative clarity.  Also, I want to offer kudos to Tim Radford for his excellent preparation of a thorough review of what the researchers had accomplished.  Their study is a warning of unimaginable scale that may well be right on target, and fully deserves everyone’s utmost attention.
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New research has shown that cleaning up air pollution actually does result in warmer air temperatures (The Guardian).  “Since the 1970s countries across Europe and North America have significantly curbed their air pollution, resulting in more of the sun’s energy reaching Earth’s surface over these locations.”  That alone is certain to have raised temperatures regionally between 1970 and 2005, offset globally by rising pollution in southeastern Asia.  The study also made the interesting revelation “that the reduction in air pollution has altered the strength and location of high altitude winds, shifting the jet stream further to the north during winter. This change has suppressed cold extremes over northern Eurasia. Future pollution reduction over China is expected to exert a similar influence.” 
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American attitudes toward climate change are rapidly changing (The Atlantic).  “It’s not a fluke, an error, or an outlier. In poll after poll, the results are clear: Climate change is one of the most important issues in the 2020 presidential election.”  The entire landscape is totally different from what it was as little as one year ago, but politicians on both sides still talk as if it is only pocketbook issues that are really important to voters once they get into the booth—and they may be right.  The Democrats have the best chance of making it a decisive issue, if they can find a more creative way to frame a convincing course of action.  Inspiring and generating the highest level of international cooperation is an absolute necessity for any kind of success, and would be a good thing to start emphasizing.  Remember the Paris Agreement?
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An amazing pictorial essay about a Chinese coastal region being taken over by rising sea level (The Guardian).  At the climax you get a view of the port city of Tianjin, which is home to over 15 million people, many of whom live in dwellings constructed on reclaimed tideland.
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In today’s Weather Maps I happened to notice something of unusual interest—a giant iceberg that must be at least a hundred miles long, sitting in the middle of the Southern Ocean between Antarctica and Africa.  You can easily spot it on this image at about 7:30 o’clock.  In the second image you can see what a strong impact it is having on surrounding water temperatures.  You can also go right to the live source at https://climatereanalyzer.org/wx/DailySummary/#sstanom  and note the Anomaly effect, as well as taking a few detours for purposes of exploration in general.
 

Carl

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