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Characteristics of climatic trends and correlation between pan-evaporation and environmental factors in the last 40 years over China

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Chinese Science Bulletin

Abstract

Using the data observed by 62 Chinese Routine Meteorological Stations (CRMS) with long term radiation observation, the climatic trends and the relationship between pan-evaporation and its environmental factors are analyzed comprehensively. The results show that during the last 40 years, the relative humidity is uptrend in west China, downtrend in east China, and their extrema are 0.20%/a and −0.22 %/a respectively; the precipitations of about 61% CRMS keep uptrend, its maximum can reach 10.52 mm/a2 while the cloud amounts of about 79% CRMS keep downtrend slightly. About 98% CRMS display the air temperature uptrend, and the maximum is 0.11 °C/a. About 76% CRMS display the land surface temperature uptrend. About 87% CRMS show the daily range of temperature downtrend. The global radiations observed by about 85% CRMS and the 10 m wind speeds observed by about 77% CRMS hold downtrend. The annual pan-evaporations of about 66% CRMS hold descend trend, and the biggest descent reaches −24.9 mm/a2. The pan-evaporation has good relationship with many environmental factors, but the relationship with the relative humidity is the best. All of the climatic trends respond to the global climate changes.

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Authors and Affiliations

  1. Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, 730000, Lanzhou, China

    Hongchao Zuo, Dongliang Li, Yinqiao Hu, Yan Bao & Shihua Lü

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  1. Hongchao Zuo
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  2. Dongliang Li
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  3. Yinqiao Hu
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  4. Yan Bao
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  5. Shihua Lü
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Correspondence to Hongchao Zuo.

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Zuo, H., Li, D., Hu, Y. et al. Characteristics of climatic trends and correlation between pan-evaporation and environmental factors in the last 40 years over China. Chin.Sci.Bull. 50, 1235–1241 (2005). https://doi.org/10.1007/BF03183699

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  • DOI: https://doi.org/10.1007/BF03183699

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