Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration
© 2017. American Geophysical Union. All Rights Reserved. Recent studies suggest that springtime moisture transport into the Arctic can initiate sea ice melt that extends to a large area in the following summer and fall, which can help explain Arctic sea ice interannual variability. Yet the impact fr...
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ftcdlib:qt99z1q4g5 2023-05-15T14:25:09+02:00 Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration Yang, W Magnusdottir, G 5316 - 5329 2017-01-01 application/pdf http://www.escholarship.org/uc/item/99z1q4g5 english eng eScholarship, University of California qt99z1q4g5 http://www.escholarship.org/uc/item/99z1q4g5 public Yang, W; & Magnusdottir, G. (2017). Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration. Journal of Geophysical Research, 122(10), 5316 - 5329. doi:10.1002/2016JD026324. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/99z1q4g5 article 2017 ftcdlib https://doi.org/10.1002/2016JD026324 2018-04-13T22:51:19Z © 2017. American Geophysical Union. All Rights Reserved. Recent studies suggest that springtime moisture transport into the Arctic can initiate sea ice melt that extends to a large area in the following summer and fall, which can help explain Arctic sea ice interannual variability. Yet the impact from an individual moisture transport event, especially the extreme ones, is unclear on synoptic to intraseasonal time scales and this is the focus of the current study. Springtime extreme moisture transport into the Arctic from a daily data set is found to be dominant over Atlantic longitudes. Lag composite analysis shows that these extreme events are accompanied by a substantial sea ice concentration reduction over the Greenland-Barents-Kara Seas that lasts around a week. Surface air temperature also becomes anomalously high over these seas and cold to the west of Greenland as well as over the interior Eurasian continent. The blocking weather regime over the North Atlantic is mainly responsible for the extreme moisture transport, occupying more than 60% of the total extreme days, while the negative North Atlantic Oscillation regime is hardly observed at all during the extreme transport days. These extreme moisture transport events appear to be preceded by eastward propagating large-scale tropical convective forcing by as long as 2 weeks but with great uncertainty due to lack of statistical significance. Article in Journal/Newspaper Arctic Arctic Greenland North Atlantic North Atlantic oscillation Sea ice University of California: eScholarship Arctic Greenland Journal of Geophysical Research: Atmospheres 122 10 5316 5329 |
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University of California: eScholarship |
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English |
description |
© 2017. American Geophysical Union. All Rights Reserved. Recent studies suggest that springtime moisture transport into the Arctic can initiate sea ice melt that extends to a large area in the following summer and fall, which can help explain Arctic sea ice interannual variability. Yet the impact from an individual moisture transport event, especially the extreme ones, is unclear on synoptic to intraseasonal time scales and this is the focus of the current study. Springtime extreme moisture transport into the Arctic from a daily data set is found to be dominant over Atlantic longitudes. Lag composite analysis shows that these extreme events are accompanied by a substantial sea ice concentration reduction over the Greenland-Barents-Kara Seas that lasts around a week. Surface air temperature also becomes anomalously high over these seas and cold to the west of Greenland as well as over the interior Eurasian continent. The blocking weather regime over the North Atlantic is mainly responsible for the extreme moisture transport, occupying more than 60% of the total extreme days, while the negative North Atlantic Oscillation regime is hardly observed at all during the extreme transport days. These extreme moisture transport events appear to be preceded by eastward propagating large-scale tropical convective forcing by as long as 2 weeks but with great uncertainty due to lack of statistical significance. |
format |
Article in Journal/Newspaper |
author |
Yang, W Magnusdottir, G |
spellingShingle |
Yang, W Magnusdottir, G Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration |
author_facet |
Yang, W Magnusdottir, G |
author_sort |
Yang, W |
title |
Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration |
title_short |
Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration |
title_full |
Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration |
title_fullStr |
Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration |
title_full_unstemmed |
Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration |
title_sort |
springtime extrememoisture transport into the arctic and its impact on sea ice concentration |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
http://www.escholarship.org/uc/item/99z1q4g5 |
op_coverage |
5316 - 5329 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic Greenland North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic Arctic Greenland North Atlantic North Atlantic oscillation Sea ice |
op_source |
Yang, W; & Magnusdottir, G. (2017). Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration. Journal of Geophysical Research, 122(10), 5316 - 5329. doi:10.1002/2016JD026324. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/99z1q4g5 |
op_relation |
qt99z1q4g5 http://www.escholarship.org/uc/item/99z1q4g5 |
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public |
op_doi |
https://doi.org/10.1002/2016JD026324 |
container_title |
Journal of Geophysical Research: Atmospheres |
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122 |
container_issue |
10 |
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5316 |
op_container_end_page |
5329 |
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1766297580325568512 |