Climate Letter #1034

US winters have gotten much shorter.  This story is mostly about late arrival of first freezes, while claiming that winter has shrunk by a full month in the past century.  This is a prominent  physical way of demonstrating that global warming is really happening despite what the doubters may wish us to believe.  One point not often mentioned is that shorter winters mean less time for snow on the ground and thus have less of an albedo effect.  That has a significant impact on the warming trend as more solar radiation is then absorbed on the surface.

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A startling admission from the World Meteorological Organization, an arm of the UN.  A routine announcement about the record CO2 level in 2016 also had another point to make:  “The report also said that the last time Earth experienced similar CO2 concentration rates was three to five million years ago, when the sea level was up to 20 metres (66 feet) higher than now.”  It will be hard for the IPCC, also an arm of the UN, not to make a similar statement in its next report, graced with a high level of confidence that we are facing a similar future in a few generations.  Temperatures were also about two degrees higher at that time, which was in the mid to early Pliocene, which makes one wonder about the accuracy of any carbon budget that makes allowance for a still higher CO2 level.
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Improvements are coming for the energy storage capacity of lithium-ion batteries.  This work is being done at renowned Berkeley Labs and is apparently generating a high level of enthusiasm among the researchers.  Successful implementation means electric cars will need smaller or fewer batteries and thus be cheaper to buy than they are today for any specified range of miles.
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A comprehensive review of the implications of recent reports about the decline of insect abundance.  Causes for the decline are said to go well beyond changes in climate and habitat, drawing more attention to the overuse of pesticides.  Decimation of other forms of wildlife, especially including birds, are among the widespread effects.
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A realistic look at the need to reduce agricultural emissions and possible solutions.  This article is full of interesting statistics and ideas.  The author ultimately calls for revolutionary changes that are almost as complete as the required switch from fossil fuels to renewable.  Things simply cannot stay the way they are if the goal of zero emissions is ever to be reached so we should keep hearing more about these things.

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