A new study about “permafrost peatlands” reveals a discovery that has favorable overtones. These peatlands are hotspots for carbon emissions when they thaw, and CO2 losses are indeed readily observed. Methane losses, however, were much lower than expected in this experimental study, by way of formation of a deep carbon sink within the soil once it has thawed and dried out. Other research has found that Arctic wetlands, once they have thawed, are mostly expected to drain and dry out. The net effect reduces the overall concern about what may happen as permafrost thaws, which has already begun but is subject to so much uncertainty that IPCC projections have had little to offer that meets its usual standard of confidence.
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–A link to the full study, clearly a work of strong effort and high credibility:
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Two new studies have been jointly issued by atmospheric scientists at the University of Albany. The one that is first reviewed in this post has the most interest, and is the easiest to understand. It basically concludes that the rapid warming of temperatures in the Arctic is closely linked to the melting of sea ice, which will continue for one or two more centuries. “When the sea ice melts away completely, this elevated warming will also disappear and the warming rate in the Arctic will be similar to the rest of the world.”
https://phys.org/news/2019-03-atmospheric-scientists-climate-clues.html
https://phys.org/news/2019-03-atmospheric-scientists-climate-clues.html
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How atmospheric rivers develop and lead to disastrous flooding events (National Geographic). “They transport huge volumes of water around the world, carrying it along as vapor and cloud droplets. In an average atmospheric river, about 25 times as much water flows through the air high overhead as through the Mississippi River—and on any given day, about three or four are either developing or flowing through the sky in each hemisphere.” The increased flooding we are getting this year is largely due to the greater evaporation caused by the current warming of tropical ocean waters. That warming trend will continue, bringing more of these rivers.
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There are important new developments opening the door more widely for flow batteries. Research at the University of Sydney has developed proprietary technology that improves the functioning of zinc bromine flow batteries, leading to the formation of a company that already has international backing for the introduction of commercial applications. “So we’ve been able to overcome the disadvantages of zinc bromine by creating a fully sealed gel battery that has no moving parts, is very simple to make, and has a long lifetime.” These and other advantages, including low cost of material, indicate potential for the products to be highly competitive for energy storage ranging from individual homes all the way up to major grid backup, as required for proper supply of much renewable energy.
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The story of what is happening to the world’s fisheries because of ocean warming, and their future outlook (Inside Climate News). This post has a summary of several recent studies, and is highlighted with a chart showing how the downtrend in fish production began about thirty years ago, just as the warming entered its acute stage of steady increases. The livelihoods of over one billion people depend on these fisheries.
Carl