Climate Letter #1046

A new report about the importance of soil carbon restoration.  “Better soil management could boost carbon stored in the top layer of the soil by up to 1.85 gigatonnes each year.”  That amount is the same as 7 billion tons of CO2 gas emissions, or nearly 20% of all such emissions from human activity.  Food production would get a boost at the same time.  The cost of making the transition to better practices is not mentioned, but I can see no reason to believe it would be burdensome, and may just as well be profitable to farmers once it gets started.

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How changes in tropical forest management could produce results similar to the above, or even better.  This fine report from World Resources Institute has all the key numbers.  Right now gross annual emissions from tropical deforestation and degradation are equal to 16-19% of all emissions from human activity.  The practices that cause it, many of which are illegal, can potentially all be eliminated, enhancing the existing amount of regrowth along with many other benefits to climate and the environment.
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There are other ways to pull CO2 out of the air.  This story from BBC mostly tells about one that has recently gotten a great deal of attention.  It goes on to talk about what to do with the CO2 once it is produced and also makes reference to some of the alternatives, both mechanical and natural.  Finally, it is noted that the fossil fuel industry is beginning to promote research into “magical techno-fixes” that may help to prolong the lifespan of their traditional business.
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Confirmation of an increased CO2 level during a warming period that ran from 27 to 22 million years ago.  The warming of about 3C had been previously calculated by other means.  The climb in CO2, from about 390 ppm to about 870, was discovered from readings of unusually well-preserved biological evidence.  The relationship between these increases is very close to what modern science postulates.  The warming began at a time when Earth’s temperature was 2-3 degrees higher than right now, with CO2 a bit lower than the current 404, similar to the situation 3 million years ago as depicted in the chart link near the top of yesterday’s letter.  Besides whatever lies ahead, we still have not caught up with the normal result of the latest CO2 burst.
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Here is a neat one-minute animation showing how sea level across the globe changes from place to place during the course of each year due to shifting gravitational effects.  Keep an eye on the waters around Greenland.
Carl

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