地理学报(英文版) ›› 2015, Vol. 25 ›› Issue (12): 1423-1438.doi: 10.1007/s11442-015-1243-2

• 研究论文 • 上一篇    下一篇

  

  • 收稿日期:2015-03-17 接受日期:2015-06-26 出版日期:2015-12-31 发布日期:2016-01-05

Activity of cold vortex in northeastern China and its connection with the characteristics of precipitation and circulation during 1960-2012

Gang LIU1,2, Guolin FENG3, Yulin QIN2, Ling CAO4, Hongwei YAO5, Ziqi LIU2   

  1. 1. Atmospheric Sciences Academy of Lanzhou University, Lanzhou 730000, China
    2. Meteorological Observatory of Jilin Province, Changchun 130062, China
    3. National Climate Centre, CMA, Beijing 100081, China
    4. Jilin Province Meteorological Service Center, Changchun 130062, China
    5. Meteorological Bureau of Nong'an County, Nong’an 130200, Jilin, China
  • Received:2015-03-17 Accepted:2015-06-26 Online:2015-12-31 Published:2016-01-05
  • About author:

    Author: Ren Huiru (1983-), PhD Candidate, specialized in coastal environment and modeling. E-mail:renhr.12b@igsnrr.ac.cn

  • Supported by:
    National Natural Science Foundation of China, No.41375078, No.41405094, No.41175083, No.41275096.Science and technology development plan in Jilin Province of China, No.20150204023SF

Abstract:

Based on the daily reanalysis data released by NCEP/NCAR and the daily precipitation of 753 Chinese stations from May to August during the period of 1960 to 2012, the statistical characteristics of the cold vortex in northeastern China were analyzed. In addition, the strength index, which described the characteristics of the vortex consistently and frequently, and the geographical distribution were given by continuous anomalies of circulation. Based on this index, the activity routines of the cold vortex, characteristics of atmospheric circulation, and their effects on precipitation in northeastern China were analyzed. The results show that: the activities of the cold vortex exhibit remarkable features of annual and interdecadal oscillation, and the vortex high frequency and its characteristics of atmospheric circulation are described more accurately by the strength index of the cold vortex, which shows a high correspondence with the vortex precipitation during early summer and midsummer in the northeast. In strong (weak) vortex years, the general circulation in the middle and high latitudes of Eurasia is to the advantage (disadvantage) of the formation, development and maintenance of the cold vortex, thus it is easy (difficult) to form the circulation which is beneficial to transmit vapor from south to north during the period of July to August. Blocking over the Ural Mountains prevails (does not prevail) in early summer, and blocking over the Sea of Okhotsk prevails (does not prevail) in midsummer. Areas where the subtropical high is too small (large) and moves toward the north too late (early) are better (worse) for the maintenance of the cold vortex in northeastern China.

Key words: northeast cold vortex, index of strength, circulation, subtropical high