An update on East Antarctica’s glaciers, with a focus on the Totten. New studies about destabilization keep coming in, well summarized in this post. Here is one example, “….the sea-floor sediments revealed that the ice sheet waxed and waned many times between 5.3 million and 3.3 million years ago7 — an epoch called the Pliocene, when air temperatures were up to 2 °C higher than today.“ That could produce tens of meters of sea level rise.
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New estimates for sea level rise on the coast of California show a worsening of the expected danger. According to a state-commissioned report, “The Bay Area will see the ocean swell as much as 3.4 feet by 2100 if significant action isn’t taken.” With tough action the rise would still be 2.4 feet. Among other findings, California has 25% above-average sensitivity to melting that originates in Antarctica.
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The “Horn of Africa” is being desertified. There is evidence from the past that increased warming, as now happening, is likely to produce increased dryness and the prospect of being uninhabitable. The story goes on to make references to how quickly such changes can happen, as in the Sahara region 5000 years ago, and describes a new method of testing for past dryness by analyzing sediment cores.
Why the US federal government has an absolutely necessary role in reducing carbon emissions. In yesterday’s Climate Letter we saw reasons provided by James Hansen. Here the New Republic gives us another set of reasons, showing that increased action by cities and states, while very helpful, cannot manage the full task without help from above. The current failure of such requires a loud public response.
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In Australia, the transition to renewable electric power is accelerating. It is happening in spite of hard resistance from conservative politicians and fossil fuel interests similar to that now seen in the US. Of key importance, the economic benefits gained from making the shift have become overwhelming, enhanced by new technologies.
http://reneweconomy.com.au/tide-turns-as-solar-storage-costs-trump-ideologues-and-incumbents-79502/?
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The latest data showing where all the world’s greenhouse gases are coming from and how they have changed. This highly convenient and informative interactive chart is produced each year by the World Resources Institute. Almost three-quarters of the total comes from the top ten emitters.
Carl