朔州市近50a蒸发量变化特征及影响因子分析

利用朔州市气象观测站1956～2005年小型蒸发皿蒸发量及温度、日照、风速、湿度等资料,初步分析了朔州市蒸发量的年、月、季的变化特征,趋势及引起蒸发量变化的因子.结果表明:朔州市年、季和月蒸发量均存在明显的下降趋势,偏少趋势主要表现在春、夏2季,其中5月偏少趋势最明显;影响蒸发量变化的因子主要是温度日较差、日照、风速、湿度等,蒸发量与日照时数、平均风速、气温日较差呈显著正相关,与相对湿度、水汽压呈显著负相关,说明它们是造成蒸发量减少的重要因子.

Evaporation Characteristics and Influence Factors Analysis in Shuozhou of Shanxi in Recent 50 Years

Based on meteorological observations such as pan evaporation,temperature,sunshine hours,wind speed,humidity during 1956-2005 in Shuozhou of Shanxi Province,the annual,monthly and seasonal variation of evaporation in Shuozhou was analyzed in detail,and the influence factors of evaporation were also discussed.Results show that the evaporation presented an obvious downward trend in recent 50 years in Shouzhou,especially in spring and summer,and decreasing trend was most remarkable in May;There was obviously po...