Possible effect of SSTa in the Barents Sea in fall on the variations of Bohai Sea ice in the following winter

Zhou Qun; Wei Lixin; Huang Huanqing

doi:10.3969/j.issn.0253-4193.2016.03.004

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Zhou Qun, Wei Lixin, Huang Huanqing. Possible effect of SSTa in the Barents Sea in fall on the variations of Bohai Sea ice in the following winter[J]. Haiyang Xuebao, 2016, 38(3): 40-48. doi: 10.3969/j.issn.0253-4193.2016.03.004

Citation:

Zhou Qun, Wei Lixin, Huang Huanqing. Possible effect of SSTa in the Barents Sea in fall on the variations of Bohai Sea ice in the following winter[J]. Haiyang Xuebao, 2016, 38(3): 40-48. doi: 10.3969/j.issn.0253-4193.2016.03.004

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Possible effect of SSTa in the Barents Sea in fall on the variations of Bohai Sea ice in the following winter

doi: 10.3969/j.issn.0253-4193.2016.03.004

National Center for Marine Environment Forecast, Beijing 100081, China

Received Date: 2015-01-21
Rev Recd Date: 2015-09-01

Abstract

Abstract

By using NCEP/NCAR reanalysis data,the SST,the air temperature of 160 Chinese stations and the ice grade for Bohai Sea which indicates the ice conditions in Bohai Sea,the impacts of Barents Sea SST anomalies on the variations of the ice condition in Bohai Sea during the later period are investigated in this paper. The results indicate that the variation of the fall SST in the key region is negatively correlated to the sea-ice concentration from the preceding winter to the next summer,leading to the variations of the turbulent heat flux during the winter. During the warmer (colder) Barents Sea years,the Asian zonal circulations are evidently weakened (strengthened) accompanied by a deeper (reduced) East Asian trough and the East Asian Winter Monsoon is significantly stronger (weaker) accompany with much lower (higher) observed temperature anomalies in north China. These characteristics consistent with the increase (decrease) of the intensity and scope of the Bohai Sea Ice anomalies and the related circulation differences in the winter. Further investigation seems to suggest that in the 200 hPa wind field there is an apparent wave train from west to east related to the Barents Sea SST index and the wave train is an important way conveying the impact of the Barents Sea SST anomalies in the upstream to the East Asian area. Moreover,the circulation anomalies in the lower troposphere can be attributed to the variations of the local Hadley circulation. Therefore,the Barents Sea SST anomalies of the fall can be used as a predictor of the ice conditions in the Bohai Sea during the following winter.
- SST anomalies,
- Bohai Sea ice,
- atmospheric circulation anomalies,
- short-term climate prediction

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References

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