Climate Letter #1191

Posted on June 12, 2018 by Carl Campbell
How climate change will impact global food security.  This piece was written for Carbon Brief by the lead author of a recent scientific study.  The relationship between temperature and the three most important grain crops is clearly depicted.  The study was mainly focused on the projected decline in corn production should the temperature increase go from plus 2C to 4C.

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A new study finds a connection between the ice-free area of the Arctic Ocean and the intensity of wind and wave action.  It was intended as a warning to those who plan to navigate these waters as they open up to shipping.  There will also be greater coastal erosion and other difficulties for adjacent residents, plus a clear implication that the breakup of all sea ice could be completed sooner than expected (now thought to be around 2050) due to the same increased forces of wind and wave energy.
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A new study finds evidence that rising levels of CO2 in the atmosphere produce dangerous weather extremes well before there is a rise to the average global temperatures usually associated with such extremes.  That lends importance to the idea of setting CO2 targets as an alternative to temperature targets.  It also warns against those geoengineering plans that could cool the Earth by blocking solar radiation while letting CO2 increases continue to grow.
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Scientists find a link between increased CO2 in the atmosphere and a decline of oxygen content in ocean water.  “When the atmosphere is suffused with carbon dioxide, global temperatures climb, triggering a cascade of hydrological, biological and chemical events that conspire to sap the oceans of oxygen.”  The phenomenon has been detected in ancient geological analyses, resulting in mass extinctions of marine life, and can be observed today on a smaller but worrisome scale.  https://phys.org/news/2018-06-volcanic-declining-ocean-oxygen-triggered.html

Some interesting new energy storage ideas that are attracting big money:
Carl

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