摘要
蒸发作为大气水分和热量平衡的主要因子,也是地球水循环受气候变化影响的重要指标。进行蒸发量变化的研究,对更深入地了解区域气候变化、实现水资源可持续利用有着重要意义。利用烟台1971～2010年期间逐月蒸发皿(口径20 cm)蒸发量资料,采用主成份分析法,得出烟台蒸发皿蒸发量近40年变化较大,年代特征明显。近40年蒸发皿蒸发量呈总体下降趋势,蒸发量气候倾向率为-55.7 mm/10a,其绝对值高于全国平均变化速率-30.7 mm/10a的绝对值。不同季节蒸发皿蒸发量变化趋势不同,蒸发量下降主要在春季和秋季,夏季不明显,而冬季蒸发量呈上升趋势。
Evaporation,as the main factor of balance between water vapor and heat,was also the important index for inspecting the influence of climatic change on earth water cycle.The study on evaporation change had great significance to deeply understanding the change of regional climate and realizing the sustainable utilization of water resources.According to the monthly pan evaporation of Yantai from 1971 to 2010,it was found out through principal component analysis that the pan evaporation in Yantai changed significantly during recent 40 years,it presented an overall decreasing tendency with a climatic trend rate of-55.7 mm/10a,its absolute value was obviously higher than that of national average change rate of-30.7 mm/10a.Pan evaporation capacity changed differently in different seasons,the largest decrease was in spring and autumn,the pan evaporation changed slightly in summer and increased in winter.
出处
《安徽农业科学》
CAS
2012年第4期2284-2285,共2页
Journal of Anhui Agricultural Sciences
