Earth’s mountain glaciers are disappearing more rapidly than previously estimated (AP). “The most comprehensive measurement of glaciers worldwide found that thousands of inland masses of snow compressed into ice are shrinking 18 percent faster than an international panel of scientists calculated in 2013…..five times faster now than they were in the 1960s…..Their melt is accelerating due to global warming.” (These glaciers hold enough water to raise sea levels about 16 inches if it all melted.)
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A new study sees a growing threat of simultaneous heatwaves round the globe. Heatwaves in 2018 affected 17 countries spread across three continents. “By studying the measurement data, the researchers realised that such large-scale heatwaves first appeared in the northern hemisphere in 2010, then in 2012, and again in 2018. Prior to 2010, however, the researchers did not find any instances of such large areas being affected simultaneously by heat…..Model calculations confirm this trend. As the earth grows warmer, widespread heat extremes become more and more likely.” This poses considerable risk related to sufficiency of food supplies that could be shared.
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It takes about ten million years for the biosphere to recover following a mass extinction (Fast Company). That is the conclusion of a new study that looked into the consequences of the rapid extinction process now occurring, which is not yet in the “mass” category but firmly heading in that direction. Climate, and the CO2 level, could recover fairly quickly but the evolutionary processes behind biodiversity development are much slower.
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A theory explaining lower temperatures during the Little Ice Age has been fortified (Eos). A very thorough new study explains the linkage between sharp population decline in the New World, increased vegetation, reduced CO2 level and lower temperatures in the 17th century. “The idea was first proposed in 2003 by University of Virginia paleoclimatologist William Ruddiman, but the new study offers a synthesis of previously published population data for the Americas, alongside statistics of land use change, altered fire regimes, and carbon uptake by regrowing plants and trees that led to the dip in carbon dioxide emissions…..With drastically fewer people in the Americas, there was a lot less agriculture and a lot less burning.”
–Full access to the paper at this link:
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Collecting CO2 and using it in the production of materials needed for making concrete could be of great help toward re-cooling of the climate (Grist). One particular idea is under active development by a company called Blue Planet, headed by an inventor who has high credibility based on earlier work. “The annual use of aggregate is over 50 billion tons and growing fast. Making it from synthetic limestone instead of quarried rock could sequester 25 billion tons a year — meaning that, in 40 years, this solution alone could remove a trillion tons of CO2 from the air, enough to restore pre-industrial levels…..Blue Planet’s limestone, created using emissions collected from the Moss Landing Power Plant on Monterey Bay and other sources, has already been added to concrete in areas of San Francisco International Airport.” Stanford University has done testing.
–Much more information at the Blue Planet website:
Carl