Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales
The sharp decline of Arctic sea ice in recent decades has captured the attention of the climate science community. A majority of climate analyses performed to date have used monthly or seasonal data. Here, however, we analyze daily sea ice data for 1979-2016 using the self-organizing map (SOM) metho...
Published in: | Journal of Climate |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://doi.org/10.1175/JCLI-D-18-0301.1 |
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ftncar:oai:drupal-site.org:articles_22321 2023-09-05T13:16:12+02:00 Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales Yu, Lejiang (author) Zhong, Shiyuan (author) Zhou, Mingyu (author) Lenschow, Donald H. (author) Sun, Bo (author) 2019-03-01 https://doi.org/10.1175/JCLI-D-18-0301.1 en eng Journal of Climate--J. Climate--0894-8755--1520-0442 articles:22321 ark:/85065/d76976kv doi:10.1175/JCLI-D-18-0301.1 Copyright 2019 American Meteorological Society. article Text 2019 ftncar https://doi.org/10.1175/JCLI-D-18-0301.1 2023-08-14T18:50:13Z The sharp decline of Arctic sea ice in recent decades has captured the attention of the climate science community. A majority of climate analyses performed to date have used monthly or seasonal data. Here, however, we analyze daily sea ice data for 1979-2016 using the self-organizing map (SOM) method to further examine and quantify the contributions of atmospheric circulation changes to the melt-season Arctic sea ice variability. Our results reveal two main variability modes: the Pacific sector mode and the Barents and Kara Seas mode, which together explain about two-thirds of the melt-season Arctic sea ice variability and more than 40% of its trend for the study period. The change in the frequencies of the two modes appears to be associated with the phase shift of the Pacific decadal oscillation (PDO) and the Atlantic multidecadal oscillation (AMO). The PDO and AMO trigger anomalous atmospheric circulations, in particular, the Greenland high and the North Atlantic Oscillation and anomalous warm and cold air advections into the Arctic Ocean. The changes in surface air temperature, lower-atmosphere moisture, and downwelling longwave radiation associated with the advection are consistent with the melt-season sea ice anomalies observed in various regions of the Arctic Ocean. These results help better understand the predictability of Arctic sea ice on multiple (synoptic, intraseasonal, and interannual) time scales. Article in Journal/Newspaper Arctic Arctic Ocean Greenland North Atlantic North Atlantic oscillation Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Arctic Ocean Greenland Pacific Journal of Climate 32 5 1461 1482 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The sharp decline of Arctic sea ice in recent decades has captured the attention of the climate science community. A majority of climate analyses performed to date have used monthly or seasonal data. Here, however, we analyze daily sea ice data for 1979-2016 using the self-organizing map (SOM) method to further examine and quantify the contributions of atmospheric circulation changes to the melt-season Arctic sea ice variability. Our results reveal two main variability modes: the Pacific sector mode and the Barents and Kara Seas mode, which together explain about two-thirds of the melt-season Arctic sea ice variability and more than 40% of its trend for the study period. The change in the frequencies of the two modes appears to be associated with the phase shift of the Pacific decadal oscillation (PDO) and the Atlantic multidecadal oscillation (AMO). The PDO and AMO trigger anomalous atmospheric circulations, in particular, the Greenland high and the North Atlantic Oscillation and anomalous warm and cold air advections into the Arctic Ocean. The changes in surface air temperature, lower-atmosphere moisture, and downwelling longwave radiation associated with the advection are consistent with the melt-season sea ice anomalies observed in various regions of the Arctic Ocean. These results help better understand the predictability of Arctic sea ice on multiple (synoptic, intraseasonal, and interannual) time scales. |
author2 |
Yu, Lejiang (author) Zhong, Shiyuan (author) Zhou, Mingyu (author) Lenschow, Donald H. (author) Sun, Bo (author) |
format |
Article in Journal/Newspaper |
title |
Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales |
spellingShingle |
Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales |
title_short |
Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales |
title_full |
Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales |
title_fullStr |
Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales |
title_full_unstemmed |
Revisiting the linkages between the variability of atmospheric circulations and Arctic melt-season sea ice cover at multiple time scales |
title_sort |
revisiting the linkages between the variability of atmospheric circulations and arctic melt-season sea ice cover at multiple time scales |
publishDate |
2019 |
url |
https://doi.org/10.1175/JCLI-D-18-0301.1 |
geographic |
Arctic Arctic Ocean Greenland Pacific |
geographic_facet |
Arctic Arctic Ocean Greenland Pacific |
genre |
Arctic Arctic Ocean Greenland North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic Arctic Ocean Greenland North Atlantic North Atlantic oscillation Sea ice |
op_relation |
Journal of Climate--J. Climate--0894-8755--1520-0442 articles:22321 ark:/85065/d76976kv doi:10.1175/JCLI-D-18-0301.1 |
op_rights |
Copyright 2019 American Meteorological Society. |
op_doi |
https://doi.org/10.1175/JCLI-D-18-0301.1 |
container_title |
Journal of Climate |
container_volume |
32 |
container_issue |
5 |
container_start_page |
1461 |
op_container_end_page |
1482 |
_version_ |
1776197876224884736 |