Advances in Earth Science ›› 2020, Vol. 35 ›› Issue (11): 1113-1126. doi: 10.11867/j.issn.1001-8166.2020.102

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Study on the Spatiotemporal Evolution of Temperature and Precipitation in China from 1951 to 2018

Kai Liu 1( ),Gege Nie 1,Sen Zhang 2   

  1. 1.College of Resources and Environment,Henan University of Economics and Law,Zhengzhou 450046,China
    2.School of Geomatics and Marine Information,Jiangsu Ocean University,Lianyungang 222005,China
  • Received:2020-09-17 Revised:2020-10-20 Online:2020-11-10 Published:2021-01-25
  • About author:Liu Kai (1972-), male, Biyang County, Henan Province, Professor. Research areas include geography philosophy and GIS application. E-mail: liukai106@126.com
  • Supported by:
    National Natural Science Foundation of China “The theoretical study of Geography Ontology”(41771445)

Kai Liu,Gege Nie,Sen Zhang. Study on the Spatiotemporal Evolution of Temperature and Precipitation in China from 1951 to 2018[J]. Advances in Earth Science, 2020, 35(11): 1113-1126.

This study used daily temperature and precipitation data from 699 weather stations in China from 1951 to 2018 to study the spatiotemporal evolution characteristics of temperature and precipitation in China, by using Mann-Kendall test, wavelet analysis, and RClimDex extreme temperature index methods. The results show that: In terms of time, the temperature in China presents an obvious increasing trend; the increase in precipitation is lagging and slow; the temperature and precipitation have multi-period changes; and there is a correlation on a large time scale. With the number of freezing days ID0 expressed by the highest temperature and abnormal warmth compared with the number of frost days FD0 and the number of warm night days TN90p expressed in the lowest temperature, the number of continuous days TX90p has a smaller change. The longest continuous precipitation days CWD and the longest drought duration CDD show a downward trend. Climate change is mainly characterized by warming and humidification. Spatially, the average temperature and precipitation both show a decreasing trend in the latitude direction. The contours move northward as a whole, which is largely affected by the topography, showing complementary spatial distribution characteristics. The number of warm days TX90p and the number of summer days SU25 are positive across the country. The number of freezing days ID0 and the number of frost days FD0 decrease in most areas. The longest continuous dry days CDD and the longest continuous humid days CWD have a certain degree of opposite spatial variation, and there is an increasing trend in extreme precipitation events. Studying the temporal and spatial evolution characteristics of temperature and precipitation is an important part of understanding and coping with the impact of climate change on the region.

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