摘要
选取广东省86个气象观测站的观测资料,采用气候趋势分析和通径分析方法,对广东省1961～2003年小型蒸发皿蒸发量及其相关气象影响因子进行了分析。结果表明:虽然汛期广东省整体平均蒸发量呈下降趋势,前汛期、后汛期线性倾向率分别为-15.86 mm/10a和-13.79 mm/10a;但变化趋势在广东省内空间分布并不均匀,前汛期、后汛期粤东、中部部分地区分别有16、12个站呈上升趋势;前汛期6种气象因子单独对蒸发的决定程度按大小依次为:日照时数>气温>风速>降水>饱和差>气温日较差,后汛期6种气象因子单独对蒸发的决定程度按大小依次为:日照时数>降水>饱和差>风速>气温>气温日较差,整个汛期日照时数与其它各要素的协同作用对蒸发皿蒸发量的决定作用都很大。日照时数和风速总体上的下降是导致广东省汛期蒸发皿蒸发量逐年减少的重要原因。
Based on meteorological data of 86 weather stations from 1961 to 2003 over Guangdong,climate trend and path analyses were applied to understanding changes in pan evaporation and its relation with meteorological factors.Results showed that pan evaporation had a decrease trend in flood season and the linear trend rates were-15.86mm/10a and-13.79mm/10a in early rainy season and later rainy season respectively.Its spatial distribution was inhomogeneous.Meteorological factors affecting pan evaporation were orderly sunshine duration,temperature,wind speed,precipitation,air vapor pressure deficit,daily temperature range in the early rainy season;they were in order sunshine duration,precipitation,air vapor pressure deficit,wind speed,temperature,daily temperature range in the later rainy season;the synergism of sunshine duration and other meteorological factors also affected the pan evaporation greatly.The decrease in pan evaporation was mostly resulted from reduction of both sunshine duration and wind speed.
出处
《广东海洋大学学报》
CAS
2010年第4期81-85,共5页
Journal of Guangdong Ocean University
基金
广东海洋大学2009年大学生研究创新性实验项目(CXSY200906)
