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Showing posts from August, 2022

Climate science: Greenland ice sheet to contribute over 270mm to sea-level rise

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Nature Climate Change The overall loss of ice from the Greenland ice sheet — alongside increasing precipitation, ice flow discharge and meltwater runoff — will lead to at least 274 mm in sea-level rise, regardless of future climate warming projections, according to a study published in Nature Climate Change. The glaciologist team setting up an automatic weather station on the snowy surface above the snow line during the melt season. Credit: The Geological Survey of Denmark and Greenland, GEUS Greenland’s ice budget deficit emerged after the 1980s when it began losing more ice, due to surface melt runoff and ice flow discharge, than it gained in the accumulation of precipitation. However, despite its importance to future sea-level rise, the ability to accurately predict Greenland’s response to climate change is hindered by the imprecise measurements of land, atmosphere and ocean boundaries in current models. Professor Jason Box taking ice samples standing on exposed ice below the snow

North American boreal trees show a decline in the survival of saplings in response to warming or reduced rainfall.

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Nature  Four separate papers exploring how forests and tree species respond to global changes — such as rising temperatures — are published in Nature this week. The studies highlight some of the challenges forests in North America and the Amazon may face in response to climate change. Temperate deciduous tree with a dendrometer band, of the type used in the study, in the ForestGEO plot at the Smithsonian Conservation Biology Institute in Front Royal, VA. Credit: Kristina J. Anderson-Teixeira A study of nine North American boreal tree species, including maples, firs, spruces and pines, shows a decline for all species in the survival of saplings in response to warming or reduced rainfall. In a five-year open-air field experiment, Peter Reich and colleagues found that fir, spruce and pine species abundant in southern boreal forests had the largest reductions in growth and survival due to changes in climate.  Temperate deciduous tree with a dendrometer band, of the type used in the study,