The impact of the autumn Atlantic sea surface temperature three-pole structure on winter atmospheric circulation

Shi Xiaomeng; Sun Jilin; Sun Yawen; Bi Wei; Zhou Xuan; Yi Li

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Shi Xiaomeng, Sun Jilin, Sun Yawen, Bi Wei, Zhou Xuan, Yi Li. The impact of the autumn Atlantic sea surface temperature three-pole structure on winter atmospheric circulation[J]. Haiyang Xuebao, 2015, 37(7): 33-40.

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The impact of the autumn Atlantic sea surface temperature three-pole structure on winter atmospheric circulation

1.
Qingdao Meteorological Observatory, Qingdao Meteorological Bureau, Qingdao 266003, China;College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China
2.
College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China
3.
Qingdao Meteorological Observatory, Qingdao Meteorological Bureau, Qingdao 266003, China

Received Date: 2014-09-15
Rev Recd Date: 2015-01-27

Abstract

Abstract

Based on the National Center for Environmental Prediction (NCEP) reanalysis data, Hadley Sea Surface Temperature (SST) and so on, this thesis analysed the mechanism of the autumn Atlantic SSTA effecting on the winter high altitude circulation. The research results are as follows:(1)There is an interaction between North Atlantic SSTA and the atmospheric circulation anomaly; (2)The autumn Atlantic SSTA has good continuity. Due to the continuity of the autumn SSTA in North Atlantic, the "positive-negative-positive (+-+)" distribution of North Atlantic SSTA leads to larger December 500 hPa geopotential height over the Barents Sea;(3)Under the sea surface wind anomaly (SSWA) actions, the feedback mechanism and wind-evaporation-SSTA can benefit the ‘+-+’ SSTA lasting and the feedback to atmospheric circulation anomaly; (4) The negative SSTA moves easterly from October to December, and the stronger evaporation, because of the same wind direction of the SSWA and background wind, produces stronger up-vertical movement. With the positive precipitation area moving easterly from Western Europe, the latent heat transport to the Barents Sea along with the southeast airflow in front of the low trough, promotes the development of the Ridge. Research shows the SSTA and atmospheric circulation anomaly can be affected by autumn Atlantic SSTA through the periodic air-sea interaction mechanism and the winter climate change in Northeast China produces a corresponding change.
- autumn,
- Barents Sea,
- North Atlantic,
- SSTA,
- winter climate

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References

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