Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration
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...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
eScholarship, University of California
2017
|
Subjects: | |
Online Access: | https://escholarship.org/uc/item/99z1q4g5 |
id |
ftcdlib:oai:escholarship.org/ark:/13030/qt99z1q4g5 |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:oai:escholarship.org/ark:/13030/qt99z1q4g5 2023-05-15T14:49:23+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 https://escholarship.org/uc/item/99z1q4g5 unknown eScholarship, University of California qt99z1q4g5 https://escholarship.org/uc/item/99z1q4g5 public Journal of Geophysical Research, vol 122, iss 10 Meteorology & Atmospheric Sciences article 2017 ftcdlib 2021-04-16T07:10:25Z 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 Greenland North Atlantic North Atlantic oscillation Sea ice University of California: eScholarship Arctic Greenland |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Meteorology & Atmospheric Sciences |
spellingShingle |
Meteorology & Atmospheric Sciences Yang, W Magnusdottir, G Springtime extrememoisture transport into the Arctic and its impact on sea ice concentration |
topic_facet |
Meteorology & Atmospheric Sciences |
description |
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 |
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 |
https://escholarship.org/uc/item/99z1q4g5 |
op_coverage |
5316 - 5329 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic Greenland North Atlantic North Atlantic oscillation Sea ice |
op_source |
Journal of Geophysical Research, vol 122, iss 10 |
op_relation |
qt99z1q4g5 https://escholarship.org/uc/item/99z1q4g5 |
op_rights |
public |
_version_ |
1766320437394931712 |