生态与农村环境学报2016，Vol.32Issue(4)：552-557,6.DOI:10.11934/j.issn.1673-4831.2016.04.006
江西省潜在蒸发量变化规律及“蒸发悖论”成因分析
Trends of Potential Evapotranspiration in Jiangxi Province and Formation of Evaporation Paradox
摘要
Abstract
In order to analyze potential evapotranspiration in the past 55 years for trend of its variation and validate wheth⁃er and how"evaporation paradox"existed in Jiangxi Province, monthly meteorological data of the years of 1957-2011 were gathered from 15 national⁃level meteorological observatories in Jiangxi Province. On such a basis, potential evapotranspira⁃tion ( ET0 ) was calculated with the Penman⁃Monteith formula for analysis of spatio⁃temporal variation rule of ET0 with the spatial interpolation and data mining technology, partial derivatives of each variable of the Penman⁃Monteith formula de⁃rived, and causes of the ET0 variation and their sensitivities to each variable quantitated with the help of total differential and partial derivative coefficient of each variable. Results show that since 1970 annual mean ET0 in Jiangxi Province had been declining significantly, while temperature there rising remarkably, thus forming obvious “evaporation paradox”. Mean potential evaporation of a year, the flood season and the non⁃flood season was 0�20, 0�10 and 0�31 mm·d-1 , re⁃spectively, lower in the years after 1970 than in the years before that. Especially the decrease in sunshine hour and mean wind velocity caused the three indices to fall by 0�19 and 0�04, 0�25 and 0�04, 0�25 and 0�04 mm·d-1 , respectively. Meanwhile, the partial derivative of ET0 was the biggest to sunshine hour and mean wind velocity. Analysis in the study demonstrates that the rules of variation of ET0 and temperature in Jiangxi Province was mainly determined by duration of sunshine hour and mean wind velocity.关键词
蒸发能力/蒸发悖论/敏感性分析/Penman-Monteith公式Key words
evaporation power/evaporation paradox/sensitivity analysis/Penman-Monteith formula分类
天文与地球科学引用本文复制引用
鲁向晖,白桦,穆兴民,杨文利..江西省潜在蒸发量变化规律及“蒸发悖论”成因分析[J].生态与农村环境学报,2016,32(4):552-557,6.基金项目
国家自然科学基金（31360175）；江西省教育厅科学技术研究项目（ GJJ151123）；江西省水利厅科技项目 （）
