SCIENTIA GEOGRAPHICA SINICA ›› 2023, Vol. 43 ›› Issue (8): 1495-1505.doi: 10.13249/j.cnki.sgs.2023.08.018

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Spatiotemporal variations of climate extremes and influential factors in deserts and sandy fields of northern China from 1961 to 2019

Hou Chengzhi1(), Huang Danqing2, Gui Dongwei3, Lei Jiaqiang3, Lu Huayu1, Xu Zhiwei1,*()   

  1. 1. School of Geography and Ocean Science, Nanjing University, Nanjing 210023, Jiangsu, China
    2. School of Atmospheric Sciences, Nanjing University, Nanjing 210023, Jiangsu, China
    3. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
  • Received:2022-05-16 Revised:2022-09-12 Online:2023-08-20 Published:2023-08-30
  • Contact: Xu Zhiwei;
  • Supported by:
    National Natural Science Foundation of China(42122001);National Natural Science Foundation of China(42075020);The Fundamental Research Funds for the Central Universities(0209-14380091)


Based on the meteorological observation datasets including daily maximum temperature, daily minimum temperature and precipitation, etc. at 61 stations in the hinterland of deserts and sandy fields and surrounding area in northern China, temporal and spatial variations of climate extremes were analyzed from 1961—2019 by 24 different extreme climate indices, and their influential factors were discussed. The results show that: 1) During 1961—2019, obvious warming trend has been found in these deserts and sandy fields. Extreme temperature indices have significant changing trend with small spatial difference. The frost days, cold nights and other extreme cold events have decreased significantly, while the number of summer days, warm days and other extreme warm events have increased significantly. 2) Extreme precipitation indices have large interannual fluctuations, and they mostly increased in western deserts and decreased in eastern sandy fields. The annual precipitation in western deserts has a significant increasing trend at the rate of 5.11 d/10a, and other extreme precipitation indices such as daily maximum precipitation, moderate rain days and heavy precipitation also have also increased significantly. The annual precipitation and other extreme precipitation indices in eastern sandy fields show an obvious decreasing trend, indicating the drying trend in this region. 3) The changes in extreme temperature indices in the deserts and sandy fields of northern China show consistency with other parts of China, while the rates exceed that of most part of global land such as North America, South Africa, Australia, etc. 4) The changes in extreme low temperature and extreme cold events in eastern sandy fields are significantly correlated with the Arctic Oscillation. The weakening of East Asian summer monsoon during recent decades is the main cause for the decrease in extreme precipitation in eastern sandy fields, while the increase in extreme precipitation in western deserts may be affected by multiple factors including the Atlantic Multi-decadal Oscillation and the Pacific Decadal Oscillation.

Key words: deserts and sandy fields, climate extremes, regional differences, climate change

CLC Number: 

  • P461