Impact of the Barents Sea SST in Autumn on the Winter Climate in Northeast China

• 作者: Jilin Sun Jingshu Dong Min Geng Xiaomeng Shi Yu Gu
• 来源期刊: 地球科学和环境保护期刊(英文)
• 学科: 地球科学
• 关键词: AUTUMN the Barents Sea SSTA ATMOSPHERIC CIRCULATION
• 年，卷（期）: 2017,（7）
• 页码范围: 89-95
• 页数: 7页
• 分类号: P4

摘要

We studied effects of sea surface temperature anomaly (SSTA) in the Barents Sea in autumn on the atmospheric circulation in northeast China in winter, using the NCEP reanalysis data and sea surface temperature (SST) data of the Hadley Center. The results show that the ocean thermal conditions in the Barents Sea in autumn can be used as an important reference factor for predicting the cold air activity in China. When the sea surface temperature anomaly of the Barents Sea elevated in the autumn, the sea-level pressure anomaly elevated in eastern China on December, northeast China and southeastern Russia on January and February. In the years when the SSTA of the Barents Sea elevated in the autumn, the abnormal high-pressure ridge developed over Europe, and the geopotential height in western China appeared negative anomaly at 500 hPa. At 1000 hPa, the Mongolia high-pressure increased and the northerly airflow strengthened the cold high-latitude air broke out to the south, which was easy to affect northeast and north of China. In negative SSTA years, the high-pressure ridge was west to the north Atlantic, and the geopotential height in central and northern Siberia appeared negative anomaly at 500 hPa;the Mongolia high-pressure was weakened at 1000 hPa.