Chinese scientists give warning about the future decline of water supply gained from glacial melting on the Tibetan plateau. “The plateau, with tens of thousands of glaciers, boasts the headwaters of Asia’s 10 largest rivers, including the Yangtze, Yellow, Indus, Yarlung Zangbo and Syr Darya rivers, which provide water for three billion people across Asia…..By 2060 to 2070, rising temperatures due to climate change will lead to ever-stronger glacier retreat on the plateau, and rivers fed by the seasonal melting will provide less freshwater.” Temperatures in the region, known as the world’s Third Pole, are rising at a rate of more than twice the global average.
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The Greenland and Antarctic ice sheets are both said to have tipping points at or slightly above the 1.5-2.0C temperature threshold, which would result in irreversible mass loss. This new study {Abstract only} does not foresee an acceleration of melting for either one if the global temperature average can be contained within those limits. Greenland is more affected by melting from the top and Antarctica more from underside weakening at the edges.
–Comment: The study has a large and impressive list of authors, giving it strong credibility. Other studies have made it clear that the current rate of sea level rise, 3 to 4 millimeters per year, would take over two centuries to reach one meter. Crossing the tipping point would lead to a surge of anywhere from 5 to 25 meters, beginning in the second half of this century. That choice, to the extent it can be made, and which is now pretty tight, should be given wide publicity so everyone would know about it.
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Five highlights from the recent WWF 2018 report on the Living Planet are examined by Deutsche Welle. None of these things are obvious to the vast majority of humans. Someone has to go out and make all the studies, do the measurements, compile the data, and then file the reports. That has all been done, but people still have to listen, and believe, and respond, on their own initiative. For that, WWF says the next 24 months will be crucial for getting something done that will be effective.
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Heat shock caused by climate change poses a threat to male fertility. A study limited to one species of beetle was interpreted as a meaningful demonstration of the sensitivity of male sperm to unusual amounts of heat. The researchers compared the effects of artificial heatwaves to standard control conditions. The result: “The team found that heatwaves halved the amount of offspring males could produce, and a second heatwave almost sterilised males…..Females, by contrast, were unaffected by heatwave conditions.” Past research has offered indications of heat damage to sperm in many other kinds of animals as a way of explaining the evolution of common physical properties.
https://www.sciencedaily.com/releases/2018/11/181113080927.htm
https://www.sciencedaily.com/releases/2018/11/181113080927.htm
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Here is another insect story, this time unrelated to climate change, that is worthy of everyone’s attention. Note that the screening “undoubtedly represents an underestimate….”
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The most interesting result of the recent election—a Democrat running in a Republican stronghold made climate change the center of his entire campaign, and won. I would bet that he picked up a large majority of Independent voters, who in fact outweigh either of the two parties almost everywhere, and also attracted many young people to vote who otherwise would have stayed home, as most of them did everywhere else.
Carl