[1]XIE Ping,LONG Huaiyu,ZHANG Yangzhu,et al.Dominant Meteorological Factors of Spatiotemporal Variations of Seasonal Potential Evapotranspiration in Yunnan Province During the Period from 1981 to 2011[J].Research of Soil and Water Conservation,2017,24(02):184-193.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 02
Page number:
184-193
Column:
Public date:
2017-04-28
- Title:
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Dominant Meteorological Factors of Spatiotemporal Variations of Seasonal Potential Evapotranspiration in Yunnan Province During the Period from 1981 to 2011
- Author(s):
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XIE Ping1,2, LONG Huaiyu1, ZHANG Yangzhu2, ZHANG Renlian1
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1. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
2. College of Resources and Environment, Hu’nan Agricultural University, Changsha 410128, China
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- Keywords:
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Yunnan Province; potential evapotranspiration; seasons; meteorological factors; sensitivity coefficient; contribution rate
- CLC:
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S161.4
- DOI:
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- Abstract:
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Based on the data of 52 meteorological stations in Yunnan Province from 1981 to 2011, we quantitatively analyzed the main factors affecting the change of seasonal potential evapotranspiration in each station by sensitivity coefficient and the contribution rate. The results show that:(1) the average temperature was the most sensitive variable for seasonal ET0 in each station, and then followed by relative humidity, sunshine hours in spring, summer and autumn in the period from 1981 to 1990 and from 1991 to 2011, the sensitive of wind speed was the lowest; in winter, relative humidity was the most sensitive factor in a few stations; (2) the main factor of ET0 change in most stations was different with seasons; from 1981 to 1990 in most stations, the determining factor of winter ET0w was average temperature, and sunshine hours were the determining factor of other three seasons; from 1991 to 2011 in most stations, the ET0 changed in summer mainly due to the sunshine hours, and other seasons were average temperature; (3) the spatial distribution patterns of main factors were different. The rise of average temperature was the dominating factor leading to the increase of winter ET0w in the eastern region, and the sunshine hour was the main factor of summer ET0e change in south-central area; in spring and summer, the regional diversity of the dominating factor was relatively obvious in different periods. The above results indicated that the dominating factor affecting the ET0 in Yunnan Province had the characteristics of stage, season and region.