Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia
Climate models simulate an intensifying Arctic hydrologic cycle in response to climatic warming, however the role of surface-atmosphere interactions from degrading frozen ground is unclear in these projections. Using Modern-Era Retrospective Analysis for Research and Applications (MERRA) data in hig...
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ftsilluniv:oai:opensiuc.lib.siu.edu:gers_pubs-1036 2023-05-15T15:07:09+02:00 Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia Ford, Trent Frauenfeld, Oliver W 2016-01-18T08:00:00Z application/pdf https://opensiuc.lib.siu.edu/gers_pubs/34 https://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1036&context=gers_pubs unknown OpenSIUC https://opensiuc.lib.siu.edu/gers_pubs/34 https://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1036&context=gers_pubs Publications text 2016 ftsilluniv 2021-09-30T20:08:10Z Climate models simulate an intensifying Arctic hydrologic cycle in response to climatic warming, however the role of surface-atmosphere interactions from degrading frozen ground is unclear in these projections. Using Modern-Era Retrospective Analysis for Research and Applications (MERRA) data in high-latitude Eurasia, we examine long-term variability in surface-atmosphere coupling as represented by the statistical relationship between surface evaporative fraction (EF) and afternoon precipitation. Changes in EF, precipitation, and their statistical association are then related to underlying permafrost type and snow cover. Results indicate significant positive trends in July EF in the Central Siberian Plateau, corresponding to significant increases in afternoon precipitation. The positive trends are only significant over continuous permafrost, with non-significant or negative EF and precipitation trends over isolated, sporadic, and discontinuous permafrost areas. Concurrently, increasing EF and subsequent precipitation are found to coincide with significant trends in May and June snowmelt, which potentially provides the moisture source for the observed enhanced latent heating and moisture recycling in the region. As climate change causes continuous permafrost to transition to discontinuous, discontinuous to sporadic, sporadic to isolated, and isolated permafrost disappears, this will also alter patterns of atmospheric convection, moisture recycling, and hence the hydrologic cycle in high-latitude land areas. Text Arctic Climate change permafrost Southern Illinois University Carbondale: OpenSUIC Arctic Merra ENVELOPE(12.615,12.615,65.816,65.816) |
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Southern Illinois University Carbondale: OpenSUIC |
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ftsilluniv |
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description |
Climate models simulate an intensifying Arctic hydrologic cycle in response to climatic warming, however the role of surface-atmosphere interactions from degrading frozen ground is unclear in these projections. Using Modern-Era Retrospective Analysis for Research and Applications (MERRA) data in high-latitude Eurasia, we examine long-term variability in surface-atmosphere coupling as represented by the statistical relationship between surface evaporative fraction (EF) and afternoon precipitation. Changes in EF, precipitation, and their statistical association are then related to underlying permafrost type and snow cover. Results indicate significant positive trends in July EF in the Central Siberian Plateau, corresponding to significant increases in afternoon precipitation. The positive trends are only significant over continuous permafrost, with non-significant or negative EF and precipitation trends over isolated, sporadic, and discontinuous permafrost areas. Concurrently, increasing EF and subsequent precipitation are found to coincide with significant trends in May and June snowmelt, which potentially provides the moisture source for the observed enhanced latent heating and moisture recycling in the region. As climate change causes continuous permafrost to transition to discontinuous, discontinuous to sporadic, sporadic to isolated, and isolated permafrost disappears, this will also alter patterns of atmospheric convection, moisture recycling, and hence the hydrologic cycle in high-latitude land areas. |
format |
Text |
author |
Ford, Trent Frauenfeld, Oliver W |
spellingShingle |
Ford, Trent Frauenfeld, Oliver W Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia |
author_facet |
Ford, Trent Frauenfeld, Oliver W |
author_sort |
Ford, Trent |
title |
Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia |
title_short |
Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia |
title_full |
Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia |
title_fullStr |
Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia |
title_full_unstemmed |
Surface-Atmosphere Moisture Interactions in the Frozen Ground Regions of Eurasia |
title_sort |
surface-atmosphere moisture interactions in the frozen ground regions of eurasia |
publisher |
OpenSIUC |
publishDate |
2016 |
url |
https://opensiuc.lib.siu.edu/gers_pubs/34 https://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1036&context=gers_pubs |
long_lat |
ENVELOPE(12.615,12.615,65.816,65.816) |
geographic |
Arctic Merra |
geographic_facet |
Arctic Merra |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
Publications |
op_relation |
https://opensiuc.lib.siu.edu/gers_pubs/34 https://opensiuc.lib.siu.edu/cgi/viewcontent.cgi?article=1036&context=gers_pubs |
_version_ |
1766338715611824128 |