1. Analysis on temporal and spatial distribution of reference evapotranspiration and its possible influencing factors in Yunnan Province.
- Author
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Li, Yashan, Nan, Lijun, Wang, Yanjun, Xu, Chengdong, Yang, Yunyuan, Cui, Changwei, Yang, Junmei, Guo, Yuan, Li, Miaorong, Trincone, Antonio, Azevedo, Joao L., and Gong, Mingfu
- Subjects
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METEOROLOGICAL observations , *EVAPOTRANSPIRATION , *PLANT water requirements , *PLANT transpiration - Abstract
This article was based on the climate data of 125 meteorological stations from 1982 to 2011 in Yunnan Province, the daily basis
ET 0 was calculated with Penman-Monteith equation recommended byFAO in 1998. Then the Kriging interpolation method and related methods of climate statistical diagnosis analysis were used to analyze the features. The main results showed that the highest value of annualET 0 of Yunnan Province was the joint parts of Dali, Lijiang and Chuxiong, and also the north of Chuxiong and Kunming, while the least value was the northeast and northwest of Yunnan Province. TheET 0 was showed rising trend, the speed was about 5.9mm/10a, but the rising trend was not significant. TheET 0 of spring was highest, and theET 0 of summer and autumn was taken the second place, theET 0 of winter was last. TheET 0 of spring, summer, autumn, winter was account for 33.35 per cent, 28.91 per cent, 20.36, per cent, 17.39 per cent of annualET 0 respectively. TheET 0 of May was highest and December was least in annual.ET 0 was closely related to wind speed, relative humidity, hours of sunshine and the daily maximum temperature. The correlation between wind speed, hours of sunshine, the daily maximum temperature andET 0 was very significantly positive, while the correlation between relative humidity andET 0 was very significantly negative. [ABSTRACT FROM AUTHOR]- Published
- 2018
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