Plateau Meteorology

Plateau Meteorology >

2019 , Vol. 38 >Issue 3: 518 - 527

DOI: https://doi.org/10.7522/j.issn.1000-0534.2019.00025

Discussion on the Characteristics of Plateau Monsoon and Its Relationship with East Asian Summer Monsoon

  • WANG Yidan ,
  • HU Zeyong ,
  • SUN Genhou ,
  • XIE Zhipeng ,
  • YAN Xiaoqiang ,
  • ZHENG Huixuan ,
  • FU Chunwei
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  • Key Laboratory for land process and climate change in cold and Arid Regions, Northwest Institute of Ecological and Environmental Resources, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China;Center for Excellence in Tibetan Plateau Earth Science, Chinese Academy of Science, Beijing 100101, China;University of Chinese Academy of Sciences, Beijing 100049, China;School of Atmospheric Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China;Institute of Tibetan Plateau, Chinese Academy of Sciences, Beijing 100101, China;Chengdu Meteorological Administration, Chengdu 610071, Sichuan, China

Received date: 2018-11-23

  Online published: 2019-06-28

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Abstract

This paper uses ERA-Interim's geopotential height field, temperature field and wind field reanalysis data to calculate the Dynamic Plateau Monsoon Index (DPMI) from 1988 to 2017, and analyzed the spatial distribution of the plateau monsoon. The relationship between characteristics and time evolution, combined with the East Asian Summer Monsoon Index (EASMI), explores the relationship between the plateau monsoon and the East Asian monsoon. The results show that:(1) The plateau summer monsoon began to form in April, and the warm low value system was formed on the plateau. In June, the warm low-pressure system center formed and reached the strongest. At this time, the plateau summer wind intensity also reached the maximum; the warm closed low pressure in October The system moves to the northeast and the intensity decreases and exits. The plateau summer monsoon ends. (2) DPMI and EASMI have obvious interannual variation characteristics, and the intensity of the plateau summer monsoon and the East Asian summer monsoon is consistent in the key years. (3) The geopotential height field of the mid-latitude area affected by the East Asian monsoon and the geopotential height field of the Qinghai-Tibet Plateau are in the same positive correlation area, and the correlation coefficient between DPMI and EASMI in the first two months is the largest, indicating that the plateau summer monsoon pair The East Asian summer monsoon has certain indications. (4) The East Asian summer monsoon circulation is affected by the change of the plateau temperature field. The low-pressure system of the plateau summer monsoon is closely related to the plateau temperature field.

Key words： Qinghai-Xizang Plate; Plateau Monsoon; East Asia Summer Mon; Plateau Monsoon inde

Cite this article

WANG Yidan , HU Zeyong , SUN Genhou , XIE Zhipeng , YAN Xiaoqiang , ZHENG Huixuan , FU Chunwei . Discussion on the Characteristics of Plateau Monsoon and Its Relationship with East Asian Summer Monsoon[J]. Plateau Meteorology, 2019 , 38(3) : 518 -527 . DOI: 10.7522/j.issn.1000-0534.2019.00025

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