A look at the various possibilities about the future melting of Greenland’s ice sheet (Climate News Network). Based on the latest important study, Tim Radford provides good coverage of this highly interesting subject, both short-term and long. “By the end of this century, the island – the largest body of ice in the northern hemisphere, and home to 8% of the world’s fresh water in frozen form – will have lost 4.5% of its ice cover, and sea levels will have risen by up to 33cm.” The worst case for total loss of ice, causing 7.3 meters of sea level rise, is probably about 1000 years. Both of these prospects can be greatly improved by making substantial cuts in carbon emissions.
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–Open access to the study itself:
–A separate study finds an additional source of uncertainty in these projections, based on variations in the type of cloud cover over the continent, where good data is currently lacking. The authors believe the everyday magnitude of cloud thickness will affect the melting rate as greatly as the ultimate amount of greenhouse gas emissions.
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The main sources of precipitation along the US west coast are producing more rain, less snow (Phys.org). A new study has secured this information and made determinations of the cause. Having a reduced snowpack causes problems for water supply, and more problems result when heavy rain falls on existing snowpack.
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An intense heat wave is spreading across northern Europe (Deutsche Welle). It is expected to last for many days, with damage enhanced by a lack of rain in much of Germany. “French national weather agency Meteo-France predicted that the hot weather could produce temperatures of up to 40 degrees Celsius (104 Fahrenheit), while German agencies suggested the heat may break records…..It’s unprecedented because it’s hitting so early, in June.”
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A four-part investigative series that confirms the global decline of insect populations has been published by Mongabay, entitled “The Great Insect Dying.” This post carries a summary plus links to the entire content. “Interviews with 24 researchers on six continents, and working in 12 nations, are at the heart of the report — likely the most in-depth published on the looming insect abundance crisis by any news media outlet to date.” Climate change contributes to the problem but—for once—is not one of the major factors, like pesticides and habitat loss.
https://news.mongabay.com/2019/06/mongabay-investigative-series-helps-confirm-global-insect-decline/
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The road to net-zero emissions. Johan Rockstrom is a hard-headed scientist who wrote this opinion piece for Project Syndicate. He thinks it can be done, but there is no more time to waste. “This means deploying market-ready, scalable solutions now, and that will require bold governmental action.” Some countries are on board while others are lagging.
Carl