地球物理学进展 ›› 2018, Vol. 33 ›› Issue (3): 909-915.doi: 10.6038/pg2018BB0207

• 固体地球物理及空间物理学(大气、行星、地球动力学、重磁电及地震学、地热学) • 上一篇    下一篇

热带太平洋外海气耦合作用对东亚夏季风年代际变化的可能影响

白寒冰,曾刚   

  1. 南京信息工程大学气象灾害预报预警与评估协同创新中心,气象灾害教育部重点实验室,气候与环境变化国际合作联合实验室,南京 210044
  • 出版日期:2018-06-20 发布日期:2018-08-23
  • 作者简介:第一作者简介 白寒冰,男,1993年生,硕士研究生,主要从事东亚季风及海气相互作用研究.(E-mail: bhbsass@nuist.edu.cn)
  • 基金资助:
    国家重点研发计划(2017YFA0603800);国家自然科学基金项目(41430528)

Possible impacts of ocean-atmosphere coupling outside the tropical Pacific on interdecadal variation of East Asian summer monsoon

BAI Han-bing,ZENG Gang   

  1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disasters of Ministry of Education,Nanjing University of Information Science and Technology(NUIST), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Nanjing 210044, China
  • Online:2018-06-20 Published:2018-08-23

摘要:

利用1950—2000年逐月观测的热带太平洋海表温度分别驱动NCAR CCM3全球大气环流模式以及该模式耦合SOM(Slab Ocean Model)混合层海洋模式进行长时间积分试验,将两组试验结果相减来研究热带太平洋外海气耦合作用对20世纪70年代中后期东亚夏季风年代际变化的可能影响.模拟结果表明:热带太平洋外的海气耦合作用使得孟加拉湾、南海附近存在反气旋环流异常,导致我国东部存在偏南风异常,从而引起东亚夏季风年代际增强.其中热带印度洋的年代际增暖对东亚夏季风年代际增强有一定影响.

关键词: 东亚夏季风, 年代际变化, 海气耦合

Abstract:

The possible impact of ocean-atmosphere coupling outside the tropical Pacific on the interdecadal variation of East Asian summer monsoon since the late 1970 s are investigated based on the observed monthly tropical Pacific sea surface temperature(SST) during 1950-2000. The observed SST is used to drive the NCAR CCM3 global atmospheric circulation model and NCAR CCM3 model coupled with Slab Ocean Model(SOM) for long-term integration, respectively. Based on the subtraction of above two simulated results, ocean-atmosphere coupling effect outside the tropical Pacific are investigated. Simulation results show that the anticyclone anomaly over Bay of Bengal and South China Sea caused by the ocean-atmosphere coupling effect outside tropical Pacific generates the southerly anomalies over east of China, which results in the interdecadal enhancement of the East Asian summer monsoon. The interdecadal warming of tropical Indian Ocean may contribute to the East Asian summer monsoon’s enhancement at interdecadal scale, especially.

Key words: East Asian summer monsoon, interdecadal variation, ocean-atmosphere coupling

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