主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2022, Vol. 38 ›› Issue (5): 72-80.doi: 10.3969/j.issn.1673-503X.2022.05.009

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Effect of Pacific SST tripole on climatic yield of spring maize in northeast China

Kai-qi CHEN1(),Jian-ping LI2,3,*(),Tie-jun XIE4,Ya-zhou ZHANG2   

  1. 1. College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China
    2. Frontiers Science Center for Deep Ocean Multispheres and Earth System (FDOMES)/Key Laboratory of Physical Oceanography/Institute for Advanced Ocean Studies, Ocean University of China, Qingdao 266100, China
    3. Laboratory for Ocean Dynamics and Climate, Pilot Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
    4. Beijing Municipal Climate Center, Beijing 100089, China
  • Received:2022-03-07 Online:2022-10-28 Published:2022-11-04
  • Contact: Jian-ping LI E-mail:kyle1023@163.com;ljp@ouc.edu.cn

Abstract:

Based on maize yield data, NCEP re-analysis data, self-calibrating Palmer drought severity index (scPDSI), standardized precipitation-evapotranspiration index (SPEI), soil water content and sea surface temperature (SST) data, the effect of pacific SST tripole on climatic yield of spring maize in northeast China was analyzed.It was found that the climatic yield of spring maize in northeast China was significantly correlated with the Pacific SST tripole from January to May of the harvest year.The Pacific SST tripole could influence the regional circulation field during the seeding stage and the whole growing season of spring maize in northeast China through the teleconnection pattern over the Pacific, and then affect regional precipitation, soil moisture content, scPDSI, and SPEI, which are closely related to the climatic yield of spring maize in northeast China.When the Pacific SST tripole strengthens, a Rossby-wave-like teleconnection pattern will be formed over the Pacific, resulting in a negative vorticity anomaly in the upper air of northeast China, which is conducive to the formation of local updraft and the increase of precipitation.The Pacific SST tripole is also conducive to the formation of the southeast wind anomaly from the northwest Pacific to northeast China at the low level, which further enhances the precipitation in northeast China through water vapor transport.

Key words: Pacific SST tripole, Spring maize, Climatic yield, Atmospheric bridge

CLC Number: