Characteristics of Precipitation Anomalies in Northeast China during the Summer of 2019

Authors

  • Shiqi Xu Climate Center of Jilin Province
  • Shuai Fu State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology
  • Xueyan Yang Climate Center of Jilin Province
  • Xiaoling Jiang Meteorological Disaster Prevention Technology Center of Jilin Province
  • Yufan Li Climate Center of Jilin Province
  • Baixin Liu Climate Center of Jilin Province

DOI:

https://doi.org/10.7546/CRABS.2022.03.10

Keywords:

Northeast China, precipitation, atmospheric circulation, cold vortex, typhoon

Abstract

Using the NCEP/NCAR reanalysis data and the daily precipitation data of 237 meteorological stations in Northeast China (NEC), the characteristics of summer precipitation anomalies in 2019 are investigated, and the possible influence mechanism is also preliminarily discussed. Our statistical result shows that the overall precipitation of NEC in the summer of 2019 (∼ 448.3 mm) was remarkably higher than that in normal years (from 1981 to 2018, with the climate mean summer precipitation of 358.0 mm), in which the positive anomaly percentages of Heilongjiang Province and Songhua River basin were approximately 53% and 40%, respectively. The unusually high precipitation was the largest since the year 1961. During that period of time, the 500 hPa geopotential height field was distributed in a “.- .+ .-” pattern from west to east in the northern high latitudes, and the NEC region was fully controlled by a significant negative height anomaly field; the western Pacific subtropical high at low latitudes was significantly larger, stronger and more westerly than normal, and the ridge position was more southerly, which is conducive to the northward advance of summer monsoon and the transport of water vapour to NEC. Furthermore, the extremely active northeast cold vortex and northward typhoon are the dominant reasons for the abnormally increased precipitation over NEC.

Author Biographies

Shiqi Xu, Climate Center of Jilin Province

Mailing Address:
Climate Center of Jilin Province,
Changchun, 130062, China

E-mail: xushiqi91@163.com

Shuai Fu, State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology

Mailing Address:
State Key Laboratory
of Lunar and Planetary Sciences,
Macau University
of Science and Technology
Taipa 999078, Macau, China

E-mail: sfu@must.edu.mo

Xueyan Yang, Climate Center of Jilin Province

Mailing Address:
Climate Center of Jilin Province
Changchun, 130062, China

E-mail: jisqxtybk@sina.com

Xiaoling Jiang, Meteorological Disaster Prevention Technology Center of Jilin Province

Mailing Address:
Meteorological Disaster Prevention Technology Center
of Jilin Province
Changchun, 130062, China

E-mail: 693946569@qq.com

Yufan Li, Climate Center of Jilin Province

Mailing Address:
Climate Center of Jilin Province
Changchun, 130062, China

E-mail: 1580575257@qq.com

Baixin Liu, Climate Center of Jilin Province

Mailing Address:
Climate Center of Jilin Province
Changchun, 130062, China

E-mail: 1425800221@qq.com

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Published

27-03-2022

How to Cite

[1]
S. Xu, S. Fu, X. Yang, X. Jiang, Y. Li, and B. Liu, “Characteristics of Precipitation Anomalies in Northeast China during the Summer of 2019”, C. R. Acad. Bulg. Sci. , vol. 75, no. 3, pp. 405–413, Mar. 2022.

Issue

Section

Geophysics