The Arctic sea ice extent change connected to Pacific decadal variability
<p>After an unprecedented retreat, the total Arctic sea ice cover for the post-2007 period is characterized by low extent and a remarkable increase in annual cycle amplitude. We have identified the leading role of spring Bering Sea ice in explaining the changes in the amplitude of the annual c...
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doaj-6e26e5aebf2a418fa7b379435312bd5c2020-11-25T02:11:03ZengCopernicus PublicationsThe Cryosphere1994-04161994-04242020-02-011469370810.5194/tc-14-693-2020The Arctic sea ice extent change connected to Pacific decadal variabilityX.-Y. Yang0X.-Y. Yang1G. Wang2G. Wang3N. Keenlyside4N. Keenlyside5State Key Laboratory of Marine Environmental Science and College of Ocean and Earth Sciences, Xiamen University, Xiamen, ChinaSouthern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, ChinaDepartment of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences, Fudan University, Shanghai, ChinaCMA-FDU Joint Laboratory of Marine Meteorology, Shanghai, ChinaGeophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, NorwayNansen Environmental and Remote Sensing Center, Bergen, Norway<p>After an unprecedented retreat, the total Arctic sea ice cover for the post-2007 period is characterized by low extent and a remarkable increase in annual cycle amplitude. We have identified the leading role of spring Bering Sea ice in explaining the changes in the amplitude of the annual cycle of total Arctic sea ice. In particular, these changes are related to the recent occurrence of multiyear variability in spring Bering Sea ice extent. This is due to the phase-locking of the North Pacific Gyre Oscillation (NPGO) and the Pacific Decadal Oscillation (PDO) after about 2007, with a correlation coefficient reaching <span class="inline-formula">−0.6</span>. Furthermore, there emerge notable changes in the sea level pressure and sea surface temperature patterns associated with the NPGO in the recent decade. After 2007, the NPGO is related to a quadrupole of sea level pressure (SLP) anomalies that is associated with the wind stress curl and Ekman pumping rate anomalies in the Bering deep basin; these account for the change in Bering Sea subsurface variability that contribute to the decadal oscillation of the spring Bering Sea ice extent.</p>https://www.the-cryosphere.net/14/693/2020/tc-14-693-2020.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
X.-Y. Yang X.-Y. Yang G. Wang G. Wang N. Keenlyside N. Keenlyside |
spellingShingle |
X.-Y. Yang X.-Y. Yang G. Wang G. Wang N. Keenlyside N. Keenlyside The Arctic sea ice extent change connected to Pacific decadal variability The Cryosphere |
author_facet |
X.-Y. Yang X.-Y. Yang G. Wang G. Wang N. Keenlyside N. Keenlyside |
author_sort |
X.-Y. Yang |
title |
The Arctic sea ice extent change connected to Pacific decadal variability |
title_short |
The Arctic sea ice extent change connected to Pacific decadal variability |
title_full |
The Arctic sea ice extent change connected to Pacific decadal variability |
title_fullStr |
The Arctic sea ice extent change connected to Pacific decadal variability |
title_full_unstemmed |
The Arctic sea ice extent change connected to Pacific decadal variability |
title_sort |
arctic sea ice extent change connected to pacific decadal variability |
publisher |
Copernicus Publications |
series |
The Cryosphere |
issn |
1994-0416 1994-0424 |
publishDate |
2020-02-01 |
description |
<p>After an unprecedented retreat, the total Arctic sea ice cover for
the post-2007 period is characterized by low extent and a remarkable
increase in annual cycle amplitude. We have identified the leading role of
spring Bering Sea ice in explaining the changes in the amplitude of the
annual cycle of total Arctic sea ice. In particular, these changes are
related to the recent occurrence of multiyear variability in spring Bering
Sea ice extent. This is due to the phase-locking of the North Pacific Gyre
Oscillation (NPGO) and the Pacific Decadal Oscillation (PDO) after about
2007, with a correlation coefficient reaching <span class="inline-formula">−0.6</span>. Furthermore, there
emerge notable changes in the sea level pressure and sea surface temperature
patterns associated with the NPGO in the recent decade. After 2007, the NPGO
is related to a quadrupole of sea level pressure (SLP) anomalies that is associated with the wind
stress curl and Ekman pumping rate anomalies in the Bering deep basin; these
account for the change in Bering Sea subsurface variability that contribute
to the decadal oscillation of the spring Bering Sea ice extent.</p> |
url |
https://www.the-cryosphere.net/14/693/2020/tc-14-693-2020.pdf |
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