[1]YUE Yuan,LIU Haifeng,QIN Mengsheng,et al.Temporal-Spatial Variations of Pan Evaporation and Quantification of the Causes in Jilin Province[J].Research of Soil and Water Conservation,2021,28(02):176-183+189.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
176-183+189
Column:
Public date:
2021-02-06
- Title:
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Temporal-Spatial Variations of Pan Evaporation and Quantification of the Causes in Jilin Province
- Author(s):
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YUE Yuan1, LIU Haifeng1, QIN Mengsheng2, YAN Yaqiong3, CHEN Changsheng1, WANG Qi
4
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(1.Meteorological Observatory of Jilin Province, Changchun 130062, China; 2.Yangzhou Meteorological Observatory, Yangzhou, Jiangsu 225009, China; 3.Suqian Meteorological Bureau, Suqian, Jiangsu 223800, China; 4.Institute of Meteorology Science of Jilin Province, Changchun 130062, China)
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- Keywords:
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Jilin Province; contribution of meteorological factors; pan evaporation
- CLC:
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P332.2
- DOI:
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- Abstract:
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In order to analyze the spatial-temporal evolution characteristics and causes of pan evaporation in Jilin Province under the background of climate change, based on the data of 45 weather stations in Jilin Province from 1970 to 2014, the trend of pan evaporation in 45 years was analyzed. the factors affecting pan evaporation were quantitatively analyzed by combining with other conventional meteorological data. The results showed that: in the past 45 years, the annual pan evaporation in Jilin Province showed the significant decrease(-22.49 mm/decade); among the four seasons, the decline rate of evaporation in spring was the highest, and the changing trend slightly rose, but was not significant in other three seasons; the wind speed and water vapor pressure difference were the main factors affecting the annual pan evaporation in Jilin Province: the annual pan evaporation showed a decline trend in the 45 years because the negative contribution was more than the positive contribution; spatially, wind speed and sunshine hours were the main factors affecting the annual variation of evaporation in the west and central part of Jilin Province, while the water vapor pressure difference was the main factor in the southern region; in the four seasons, wind speed and sunshine hours were the main factors affecting the variation of evaporation in the most stations in spring; the positive contribution of water vapor pressure difference in other seasons was the main factor affecting the variation of evaporation.