Editorial Type:
Article
Article Type:
Research Article

Assessing the Influence of Regional SST Modes on the Winter Temperature in China: The Effect of Tropical Pacific and Atlantic

Zhihong Jiang Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Ministry of Education, Nanjing, China

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Hao Yang Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Ministry of Education, Nanjing, China

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Zhengyu Liu Center for Climatic Research, University of Wisconsin—Madison, Wisconsin

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Yanzhu Wu Meteorological Bureau of Suzhou City, Suzhou, China

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Na Wen Key Laboratory of Meteorological Disaster, Nanjing University of Information Science and Technology, Ministry of Education, Nanjing, China

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Print Publication:
15 Jan 2014
DOI:
https://doi.org/10.1175/JCLI-D-12-00847.1
Page(s):
868–879
Restricted access

Abstract

This study investigates the influence of different sea surface temperature (SST) modes on the winter temperature in China using the generalized equilibrium feedback assessment (GEFA). It is found that the second EOF mode of winter temperature in China during 1958–2010 shows a typical northeast–southwest (NE–SW) pattern, which is a major spatial mode of Chinese winter temperature at interannual scales. The winter temperature of the NE–SW pattern is forced mainly by SST modes in the tropical Pacific and Atlantic. For 2009/10, the tropical Pacific El Niño mode and tropical Atlantic tripole mode have the largest contribution to the response. The physical mechanism of the cold northeast–warm southwest (CNE–WSW) pattern is also explained in terms of GEFA of the responses of the atmospheric circulation. The northerly flow at the low level transports cold air to northern and northeastern China, resulting in a lower temperature there. Meanwhile, the anomaly meridional wind advects warm air from the southern oceans to southwestern China, leading to warming there.

Corresponding author address: Zhihong Jiang, Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, 219 Ningliu Rd., Nanjing, China. E-mail: zhjiang@nuist.edu.cn

Abstract

This study investigates the influence of different sea surface temperature (SST) modes on the winter temperature in China using the generalized equilibrium feedback assessment (GEFA). It is found that the second EOF mode of winter temperature in China during 1958–2010 shows a typical northeast–southwest (NE–SW) pattern, which is a major spatial mode of Chinese winter temperature at interannual scales. The winter temperature of the NE–SW pattern is forced mainly by SST modes in the tropical Pacific and Atlantic. For 2009/10, the tropical Pacific El Niño mode and tropical Atlantic tripole mode have the largest contribution to the response. The physical mechanism of the cold northeast–warm southwest (CNE–WSW) pattern is also explained in terms of GEFA of the responses of the atmospheric circulation. The northerly flow at the low level transports cold air to northern and northeastern China, resulting in a lower temperature there. Meanwhile, the anomaly meridional wind advects warm air from the southern oceans to southwestern China, leading to warming there.

Corresponding author address: Zhihong Jiang, Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, 219 Ningliu Rd., Nanjing, China. E-mail: zhjiang@nuist.edu.cn
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