Arctic sea ice melt onset favored by an atmospheric pressure pattern reminiscent of the North American-Eurasian Arctic pattern
Arctic sea ice melt onset favored by an atmospheric pressure pattern reminiscent of the North American-Eurasian Arctic pattern
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北极海冰融化的开始受大气压力模式的影响,让人想起北美-欧亚北极模式
DOI:
10.1007/s00382-021-05776-y
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发表时间:
2021
期刊:
影响因子:
4.6
通讯作者:
Jahn, Alexandra
中科院分区:
文献类型:
--
作者:
Horvath, Sean;Stroeve, Julienne;Rajagopalan, Balaji;Jahn, Alexandra
The timing of melt onset in the Arctic plays a key role in the evolution of sea ice throughout Spring, Summer and Autumn. A major catalyst of early melt onset is increased downwelling longwave radiation, associated with increased levels of moisture in the atmosphere. Determining the atmospheric moisture pathways that are tied to increased downwelling longwave radiation and melt onset is therefore of keen interest. We employed Self Organizing Maps (SOM) on the daily sea level pressure for the period 1979–2018 over the Arctic during the melt season (April–July) and identified distinct circulation patterns. Melt onset dates were mapped on to these SOM patterns. The dominant moisture transport to much of the Arctic is enabled by a broad low pressure region stretching over Siberia and a high pressure over northern North America and Greenland. This configuration, which is reminiscent of the North American-Eurasian Arctic dipole pattern, funnels moisture from lower latitudes and through the Bering and Chukchi Seas. Other leading patterns are variations of this which transport moisture from North America and the Atlantic to the Central Arctic and Canadian Arctic Archipelago. Our analysis further indicates that most of the early and late melt onset timings in the Arctic are strongly related to the strong and weak emergence of these preferred circulation patterns, respectively.
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影响因子:
8.9
作者:
S. M. Ali;F. Pithan
通讯作者:
F. Pithan
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
J. Overland;Muyin Wang
通讯作者:
Muyin Wang
影响因子:
18.3
作者:
Ding, Qinghua;Schweiger, Axel;Baxter, Ian
通讯作者:
Baxter, Ian
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
C. O. Hansen;Peter Grønsedt;C. Graversen;C. Hendriksen
通讯作者:
C. Hendriksen
DOI:
--
发表时间:
2018
期刊:
Journal of Geophysical Research: Atmospheres
影响因子:
--
作者:
A. Crawford;S. Horvath;J. Stroeve;R. Balaji;M. Serreze
通讯作者:
M. Serreze