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### 辽宁省潜在蒸散发量及其敏感性规律分析

1. 辽宁师范大学城市与环境学院,辽宁 大连 116029
• 出版日期:2017-11-20 发布日期:2017-11-20
• 作者简介:

作者简介：曹永强（1972-）,男,内蒙古丰镇人,博士,教授,主要从事水文水资源研究。 E-mail: caoyongqiang@lnnu.edu.cn

• 基金资助:
国家自然科学基金(51579126、51779114),中国科学院农业水资源重点实验室2016年对外开放基金（KFKT201602）资助

### Analysis of Potential Evaporation and Its Sensitivity in Liaoning Province

Yongqiang Cao(), Lu Gao, Liting Yuan, Weijia Li

1. College of Urban and Environmental Science, Liaoning Normal University, Dalian 116029, Liaoning, China
• Online:2017-11-20 Published:2017-11-20
• Supported by:
National Natural Science Foundation of China (51579126,51779114), Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences, 2016 Opening Fund (KFKT201602).

Abstract:

Research the change of potential evapotranspiration and its sensitivity, it is of great significance for agricultural sustainable development and protection of the ecological environment. This article use Penman-Monteith method and sensitivity coefficient method to analyze spatial and temporal variation of potential evapotranspiration and sensitivity of potential evapotranspiration to average temperature, wind speed, solar radiation, and vapor pressure from 1965 to 2014 in Liaoning Province. It aimed to investigate the dominant factors affecting the potential evapotranspiration and the quantitative response of potential evapotranspiration to climate change. The results showed that: Nearly 50 years potential evapotranspiration showed a significant decrease trend. In space, it presented by the west to east decreasing trend. The reference evapotranspiration was most sensitive to vapor pressure, which is followed by solar radiation and wind speed, average temperature on an annual scale. In terms of season, average temperature was the least sensitive variable in spring and autumn, wind speed was the least sensitive variable in summer and solar radiation was the least sensitive variable in winter. Spatially speaking, spatial variation of meteorological factors and its sensitivity coefficient are consistent during the year. Sensitivity to the temperature of the potential evaporation is increasing north to the south, sensitivity to the vapor pressure and solar radiation of the potential evaporation is decreasing east to west, but the change of wind speed is opposite. The main reasons for the decrease of potential evapotranspiration in Liaoning Province are the significant decrease of wind speed, and the decrease of solar radiation and the increase of vapor pressure also contribution to the decrease of potential evapotranspiration.

• P426.2