Journal of Arid Meteorology ›› 2021, Vol. 39 ›› Issue (5): 717-726.DOI: 10.11755/j.issn.1006-7639(2021)-05-0717

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Comparative Analysis of Drought in China and the United States in 2012

LIU Shuyan1(),RONG Yanshu1(),LYU Xingyue1,2,YIN Yuting1   

  1. 1. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China
    2. Beijing Golden-water Info-tech. Ltd, Beijing 101400, China
  • Received:2021-06-15 Revised:2021-07-30 Online:2021-10-30 Published:2021-11-08
  • Contact: Yanshu RONG



  1. 1.河海大学水文水资源学院,江苏 南京 210098
    2.北京金水信息技术发展有限公司,北京 101400
  • 通讯作者: 荣艳淑
  • 作者简介:刘书言(1997— ),女,硕士生,主要从事水文气象研究. E-mail:
  • 基金资助:


Based on the monthly precipitation grid data from GPCC, reanalysis data from NCEP/NCAR and sea surface temperature (SST) from NOAA, etc, the evolution characteristics of drought and its possible causes in China and the United States in 2012 were analyzed. The results are as follows: (1) In 2012, the drought was light in China, and it was discontinuous in time and disperse in space, while the drought in the United States reached a record high level, and the spatio-temporal distribution of drought was continuous, and the intensity of drought was significantly stronger than that in China. (2) In 2012, the average temperature was close to normal in China, while in the United States, a record high temperature occurred, which aggravated the air drying, and further the drought was more serious. (3) There were connections between drought in China and the United States in 2012 and La Niña event. La Niña events with a short interval of four months occurred twice from July 2010 to February 2012. The high-pressure ridge controlled the United States for a long time due to the persistent low temperature in the equatorial central and eastern Pacific, and the downdraft prevailed over the United States, especially the North American-North Atlantic subtropical high strengthened significantly in summer of 2012, which caused the record high temperature and more serious drought in the United States in summer. Meanwhile, the high pressure ridge controlled China in winter of 2011/2012, spring and autumn of 2012, and the downdraft prevailed over China, so the intensity of drought was relatively strong. In summer of 2012, the intensity of the western Pacific subtropical high was weak, and its location was more southward and eastward than normal, which had few influence on Chinese mainland. Therefore, the summer drought in China wasn’t serious.

Key words: China, the United States, evolution characteristics of drought, drought causes, La Niña event



关键词: 中国, 美国, 干旱演变特征, 干旱成因, 拉尼娜事件

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