近半个世纪来气候变暖背景下黄河流域潜在蒸散量的变化(英文)

编号 zgly0001585143

文献类型 期刊论文

文献题名 近半个世纪来气候变暖背景下黄河流域潜在蒸散量的变化(英文)

作者 马雪宁  张明军  李亚举  王圣杰  马潜  刘文莉 

作者单位 CollegeofGeographyandEnvironmentSciences  NorthwestNormalUniversity 

母体文献 Journal of Geographical Sciences 

年卷期 2012年06期

年份 2012 

分类号 P467 

关键词 HuangheRiverWatershed  airtemperature  precipitation  potentialevapotranspiration 

文摘内容 According to the meteorological observation data of 72 stations from 1960 to 2010 in the Huanghe (Yellow) River Watershed, China, the long-term variations of potential evapotranspiration, calculated in the modified Penman-Monteith model of Food and Agriculture Organization of the United Nations, were presented, as well as the meteorological causes for the decrease of potential evapotranspiration were discussed. Since 1960, temperature has risen significantly and potential evapotranspiration a decreasing trend, which indicated the existence of Evaporation paradox in the Huanghe River Watershed. This phenomenon was not consistent spatially or temporally with the increase of temperature, potential evapotranspiration decreased in spring, summer and winter, mainly over most parts of Shanxi and Henan, and some parts of Gansu, Ningxia, Inner Mongolia, and Shaanxi. During the recent half century, the trends of temperature and potential evapotranspiration were negatively correlated at most of the stations, while precipitation and potential evapotranspiration exhibited a contrary trend. Calculated in multiple regressions, the contribution to potential evapotranspiration change of related meteorological factors was discussed, including mean pressure, maximum and minimum temperature, sunshine hours, relative humidity and average wind speed. The decrease of wind speed in the Huanghe River Watershed may be the dominating factor causing potential evapotranspiration decreasing.