Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter
In this paper, the lead-lag relationship between the Arctic sea ice variability over the Barents-Kara Sea (BKS) and Ural blocking (UB) in winter (DJF) ranging from 1979/80 to 2011/12 is examined. It is found that in a regressed DJF-mean field an increased UB frequency (days) corresponds to an enhanc...
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/137064 2023-05-15T14:24:32+02:00 Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter Gong, Tingting Luo, Dehai 2017-04-01 http://ir.qdio.ac.cn/handle/337002/137064 https://doi.org/10.1175/JCLI-D-16-0548.1 英语 eng JOURNAL OF CLIMATE Gong, Tingting,Luo, Dehai. Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter[J]. JOURNAL OF CLIMATE,2017,30(7):2639-2654. http://ir.qdio.ac.cn/handle/337002/137064 doi:10.1175/JCLI-D-16-0548.1 Article 期刊论文 2017 ftchinacasciocas https://doi.org/10.1175/JCLI-D-16-0548.1 2022-06-27T05:38:04Z In this paper, the lead-lag relationship between the Arctic sea ice variability over the Barents-Kara Sea (BKS) and Ural blocking (UB) in winter (DJF) ranging from 1979/80 to 2011/12 is examined. It is found that in a regressed DJF-mean field an increased UB frequency (days) corresponds to an enhanced sea ice decline over the BKS, while the high sea surface temperature over the BKS is accompanied by a significant Arctic sea ice reduction. Lagged daily regression and correlation reveal that the growth and maintenance of the UB that is related to the positive North Atlantic Oscillation (NAO(+)) through the negative east Atlantic/west Russia (EA/WR-) wave train is accompanied by an intensified negative BKS sea ice anomaly, and the BKS sea ice reduction lags the UB pattern by about four days. Because the intensified UB pattern occurs together with enhanced downward infrared radiation (IR) associated with the intensified moisture flux convergence and total column water over the BKS, the UB pattern contributes significantly to the BKS sea ice decrease on a time scale of weeks through intensified positive surface air temperature (SAT) anomalies resulting from enhanced downward IR. It is also found that the BKS sea ice decline can persistently maintain even when the UB has disappeared, thus indicating that the UB pattern is an important amplifier of the BKS sea ice reduction. Moreover, it is demonstrated that the EA/WR wave train formed by the combined NAO(+) and UB patterns is closely related to the amplified warming over the BKS through the strengthening (weakening) of mid-to-high-latitude westerly wind in the North Atlantic (Eurasia). Article in Journal/Newspaper Arctic Arctic Kara Sea North Atlantic North Atlantic oscillation Sea ice Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Arctic Kara Sea Journal of Climate 30 7 2639 2654 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
description |
In this paper, the lead-lag relationship between the Arctic sea ice variability over the Barents-Kara Sea (BKS) and Ural blocking (UB) in winter (DJF) ranging from 1979/80 to 2011/12 is examined. It is found that in a regressed DJF-mean field an increased UB frequency (days) corresponds to an enhanced sea ice decline over the BKS, while the high sea surface temperature over the BKS is accompanied by a significant Arctic sea ice reduction. Lagged daily regression and correlation reveal that the growth and maintenance of the UB that is related to the positive North Atlantic Oscillation (NAO(+)) through the negative east Atlantic/west Russia (EA/WR-) wave train is accompanied by an intensified negative BKS sea ice anomaly, and the BKS sea ice reduction lags the UB pattern by about four days. Because the intensified UB pattern occurs together with enhanced downward infrared radiation (IR) associated with the intensified moisture flux convergence and total column water over the BKS, the UB pattern contributes significantly to the BKS sea ice decrease on a time scale of weeks through intensified positive surface air temperature (SAT) anomalies resulting from enhanced downward IR. It is also found that the BKS sea ice decline can persistently maintain even when the UB has disappeared, thus indicating that the UB pattern is an important amplifier of the BKS sea ice reduction. Moreover, it is demonstrated that the EA/WR wave train formed by the combined NAO(+) and UB patterns is closely related to the amplified warming over the BKS through the strengthening (weakening) of mid-to-high-latitude westerly wind in the North Atlantic (Eurasia). |
format |
Article in Journal/Newspaper |
author |
Gong, Tingting Luo, Dehai |
spellingShingle |
Gong, Tingting Luo, Dehai Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter |
author_facet |
Gong, Tingting Luo, Dehai |
author_sort |
Gong, Tingting |
title |
Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter |
title_short |
Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter |
title_full |
Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter |
title_fullStr |
Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter |
title_full_unstemmed |
Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter |
title_sort |
ural blocking as an amplifier of the arctic sea ice decline in winter |
publishDate |
2017 |
url |
http://ir.qdio.ac.cn/handle/337002/137064 https://doi.org/10.1175/JCLI-D-16-0548.1 |
geographic |
Arctic Kara Sea |
geographic_facet |
Arctic Kara Sea |
genre |
Arctic Arctic Kara Sea North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
Arctic Arctic Kara Sea North Atlantic North Atlantic oscillation Sea ice |
op_relation |
JOURNAL OF CLIMATE Gong, Tingting,Luo, Dehai. Ural Blocking as an Amplifier of the Arctic Sea Ice Decline in Winter[J]. JOURNAL OF CLIMATE,2017,30(7):2639-2654. http://ir.qdio.ac.cn/handle/337002/137064 doi:10.1175/JCLI-D-16-0548.1 |
op_doi |
https://doi.org/10.1175/JCLI-D-16-0548.1 |
container_title |
Journal of Climate |
container_volume |
30 |
container_issue |
7 |
container_start_page |
2639 |
op_container_end_page |
2654 |
_version_ |
1766296948263878656 |