Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blocking
Abstract The influence of Greenland blocking on continental cold anomalies in the Northern Hemisphere is examined. It is found that westward moving Greenland blocking (WGB) events in the recent decade are more strongly related to the sea ice decline over the Baffin Bay, Davis Strait, and Labrador Se...
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| Language: | English |
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Wiley
2017-04-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL072387 |
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| author | Xiaodan Chen Dehai Luo |
| author_facet | Xiaodan Chen Dehai Luo |
| author_sort | Xiaodan Chen |
| collection | DOAJ |
| description | Abstract The influence of Greenland blocking on continental cold anomalies in the Northern Hemisphere is examined. It is found that westward moving Greenland blocking (WGB) events in the recent decade are more strongly related to the sea ice decline over the Baffin Bay, Davis Strait, and Labrador Sea (BDL), while the quasi‐stationary Greenland blocking (QGB) events are more strongly related to the negative phase of the North Atlantic Oscillation. The frequency of WGB events is significantly increased owing to reduced mid‐high‐latitude westerly winds in the North Atlantic and its upstream region because of intensified Arctic warming related to the large BDL sea ice decline. It is further revealed that North American low temperatures are more sensitive to the WGB, while European low temperatures are more sensitive to the QGB. For the WGB, an intense cold anomaly is seen over the eastern North America. But for the QGB, strong cold anomalies appear over the North Europe and eastern Asia. Thus, it is concluded that more winter cold air outbreaks should occur over the eastern North America, if large BDL sea ice decline continues in the recent decade. |
| format | Article |
| id | doaj-art-55e6dc9d267e4d8094de1aa046a65083 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2017-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-55e6dc9d267e4d8094de1aa046a650832025-08-20T03:10:24ZengWileyGeophysical Research Letters0094-82761944-80072017-04-014473411341910.1002/2016GL072387Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blockingXiaodan Chen0Dehai Luo1CAS Key Laboratory of Regional Climate‐Environment for Temperate East Asia, Institute of Atmospheric Physics Chinese Academy of Science Beijing ChinaCAS Key Laboratory of Regional Climate‐Environment for Temperate East Asia, Institute of Atmospheric Physics Chinese Academy of Science Beijing ChinaAbstract The influence of Greenland blocking on continental cold anomalies in the Northern Hemisphere is examined. It is found that westward moving Greenland blocking (WGB) events in the recent decade are more strongly related to the sea ice decline over the Baffin Bay, Davis Strait, and Labrador Sea (BDL), while the quasi‐stationary Greenland blocking (QGB) events are more strongly related to the negative phase of the North Atlantic Oscillation. The frequency of WGB events is significantly increased owing to reduced mid‐high‐latitude westerly winds in the North Atlantic and its upstream region because of intensified Arctic warming related to the large BDL sea ice decline. It is further revealed that North American low temperatures are more sensitive to the WGB, while European low temperatures are more sensitive to the QGB. For the WGB, an intense cold anomaly is seen over the eastern North America. But for the QGB, strong cold anomalies appear over the North Europe and eastern Asia. Thus, it is concluded that more winter cold air outbreaks should occur over the eastern North America, if large BDL sea ice decline continues in the recent decade.https://doi.org/10.1002/2016GL072387Arctic sea ice declinecold wintersGreenland blocking |
| spellingShingle | Xiaodan Chen Dehai Luo Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blocking Geophysical Research Letters Arctic sea ice decline cold winters Greenland blocking |
| title | Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blocking |
| title_full | Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blocking |
| title_fullStr | Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blocking |
| title_full_unstemmed | Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blocking |
| title_short | Arctic sea ice decline and continental cold anomalies: Upstream and downstream effects of Greenland blocking |
| title_sort | arctic sea ice decline and continental cold anomalies upstream and downstream effects of greenland blocking |
| topic | Arctic sea ice decline cold winters Greenland blocking |
| url | https://doi.org/10.1002/2016GL072387 |
| work_keys_str_mv | AT xiaodanchen arcticseaicedeclineandcontinentalcoldanomaliesupstreamanddownstreameffectsofgreenlandblocking AT dehailuo arcticseaicedeclineandcontinentalcoldanomaliesupstreamanddownstreameffectsofgreenlandblocking |