The UN has issued a major new report about climate change in the Arctic (The Guardian). The most startling conclusion is that unnatural levels of temperature rise are now locked in until at least mid-century, accompanied by a wide range of information relevant to specific conditions. The report is based on an extensive list of reference materials provided by the work of many hundreds of qualified scientists, much like the sources used for IPCC reports, but in this case designed for appeal to a wider range of readership. This report indicates that the timeline for taking strong action toward mitigation has shortened in comparison with what has recently been promoted in other UN reports.
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–A presentation of the report in plain language and well-illustrated graphically is available at this link:
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A new USGS report visualizes massive damages on the coast of California from sea level rise in this century (Phys.org). “In the most extensive study to date on sea level rise in California, researchers say damages by the end of the century could be far more devastating than the worst earthquakes and wildfires in state history…..More than half a million Californians and $150 billion in property are at risk of flooding along the coast by 2100…..on par with Hurricane Katrina and some of the world’s costliest disasters.” An assumption of enhancement from unusual storm damage is included in the assessment.
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New research indicates that the Sahel region may become wetter rather than drier as the climate warms. This post was written by the author of a new study that digs into the various kinds of subtle interactions that affect climate development. The Sahel is one region that is always on the edge, and can easily tip from one extreme to another on short notice. Getting the right climate model, which is not easy, can be invaluable to future planning that will affect millions of people.
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Some useful insights into the way forests remove CO2 from the atmosphere as they grow. A group of researchers made a considerable effort to find good answers to many open questions. They learned that forests in their early growing stage take up the most CO2, then slow down as they age, and that the growth rate in mid to high latitudes exceeds that in the tropics. Overall, the potential for uptake is limited and should not be overestimated.
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An article about the catastrophic decline in insect populations, its causes, and strategies required for reversal (Deutsche Welle). The principal need is for radical changes in agricultural practices. Avoiding temperature increases above 2C from climate change is also critically important, and there is much more. “Without bugs, life as we know it would come to a halt.”
Carl