Recent warnings of devastation on the Great Barrier Reef are now coming true. An “underwater heatwave” has arrived in the northern quarter. More generally, bleaching activity as a result of El Nino is on the same scale as that of 1997-8, and is far from over. Persistent or excessively repetitive bleaching leads to coral death.
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How the UK’s climate has changed. Temperature records go all the way back to 1659, the longest anywhere. The length of the growing season, which was 244 days in the late 19th century, now averages 280. It has gained 29 days just since 1990.
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Reviews of Hansen’s new paper and its catastrophic warnings. (See yesterday’s Climate Letter for a summary of its content.) Keep in mind that Hansen has a long history of describing worst-case scenarios, and also a strong record of making successful scientific findings and forecasts. He is impossible to ignore.
For good measure, here is another set of Hansen reviews:
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The benefits of a reduced meat diet. This is a subject, not generally welcomed, that we hear about repeatedly. There is a strong connection to climate change, in that food production is estimated to account for a quarter of all greenhouse gas emissions and meat alone for up to 70% of that amount. The new research described here appears quite competent.
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Progress in the new technology of producing liquid fuels from waste CO2 gas. The process was developed at MIT, fully tested on a small scale, then licensed to China, where a large-scale pilot plant is in place. It is viewed as a potential “death knell” for biofuels.
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Hydrogen cars are viable, usable, and refuse to go away. Here is their latest accomplishment. There are still some remaining gaps to be filled for future competitiveness, but they have been diminishing bit by bit.
Carl