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Volume 28 Issue 2

Mar.  2011

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Article >  ADVANCES IN ATMOSPHERIC SCIENCES  > 2011 >  28(2): 352-362

A Comparative Analysis of Primary and Extreme Characteristics of Dry or Wet Status between Asia and North America

  • 1.

    College of Earth Science, Graduate University of Chinese Academy of Sciences, Beijing 100049,Regional Center for Temperate East Asia, Key Laboratory of Regional Climate-EnvironmentResearch for the Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029


doi: 10.1007/s00376-010-9230-0

  • In this study, the Palmer Drought Severity Index (PDSI) was used to analyze the average and extreme dry/wet states of Asia and North America from 1953 to 2003. The results indicate that the two continents underwent drying trends during this period. Compared with North America, Asia showed more severe drought trends. However, more significant and regular seasonal variation for drought was found in North America. The driest regions in Asia were located in the northern region of China, Mongolia, and eastern mid-Siberian plateau. Most regions in central North America were relatively wetter than other regions. The northern and southwestern regions of North America, as well as the Atlantic and Pacific coastal areas, experienced the most drought during this period. A sharp increase of the drought area and the number of extreme drought events took place from 1997 to 2003 in both Asia and North America. Severe drought events were more likely to occur during the summer on both continents. Asia had the most extreme drought events during July, but North America reached its highest drought frequency from June to September. In Asia, a persistent increasing trend of extreme drought emerged throughout the studied period. However, a more complex evolution of drought emerged in North America: a decreasing trend appeared before the mid-1960s and an increasing trend appeared after the late 1970s. A relatively steady dry/wet status was observed between the mid-1960s and the late 1970s. The role of exceptional, extreme drought events with respect to the La Nina event was considered during 1997--2003.
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    [2] Shuangmei MA, Congwen ZHU, 2020: Opposing Trends of Winter Cold Extremes over Eastern Eurasia and North America under Recent Arctic Warming, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 1417-1434.  doi: 10.1007/s00376-020-0070-2
    [3] Mu MU, Dehai LUO, Fei ZHENG, 2022: Preface to the Special Issue on Extreme Cold Events from East Asia to North America in Winter 2020/21, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 543-545.  doi: 10.1007/s00376-021-1004-3
    [4] Xiangdong ZHANG, Yunfei FU, Zhe HAN, James E. OVERLAND, Annette RINKE, Han TANG, Timo VIHMA, Muyin WANG, 2022: Extreme Cold Events from East Asia to North America in Winter 2020/21: Comparisons, Causes, and Future Implications, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 553-565.  doi: 10.1007/s00376-021-1229-1
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    • Manuscript History

    Manuscript received: 10 March 2011
    Manuscript revised: 10 March 2011
    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

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    A Comparative Analysis of Primary and Extreme Characteristics of Dry or Wet Status between Asia and North America

    • 1. College of Earth Science, Graduate University of Chinese Academy of Sciences, Beijing 100049,Regional Center for Temperate East Asia, Key Laboratory of Regional Climate-EnvironmentResearch for the Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Laboratory of Cloud-Precipitation Physics and Severe Storms, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029
    • Manuscript received: 2011-03-10
    • Manuscript revised: 2011-03-10

    Abstract: In this study, the Palmer Drought Severity Index (PDSI) was used to analyze the average and extreme dry/wet states of Asia and North America from 1953 to 2003. The results indicate that the two continents underwent drying trends during this period. Compared with North America, Asia showed more severe drought trends. However, more significant and regular seasonal variation for drought was found in North America. The driest regions in Asia were located in the northern region of China, Mongolia, and eastern mid-Siberian plateau. Most regions in central North America were relatively wetter than other regions. The northern and southwestern regions of North America, as well as the Atlantic and Pacific coastal areas, experienced the most drought during this period. A sharp increase of the drought area and the number of extreme drought events took place from 1997 to 2003 in both Asia and North America. Severe drought events were more likely to occur during the summer on both continents. Asia had the most extreme drought events during July, but North America reached its highest drought frequency from June to September. In Asia, a persistent increasing trend of extreme drought emerged throughout the studied period. However, a more complex evolution of drought emerged in North America: a decreasing trend appeared before the mid-1960s and an increasing trend appeared after the late 1970s. A relatively steady dry/wet status was observed between the mid-1960s and the late 1970s. The role of exceptional, extreme drought events with respect to the La Nina event was considered during 1997--2003.

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