摘要
采用单调趋势的非参数统计检验Mann-Kendall(M-K)法和灰色关联分析方法对青海湖流域及周边地区1961-2007年20cm小型蒸发皿蒸发量及其影响气候因子的变化趋势进行了分析.结果表明,近47a来青海湖流域及周边地区的蒸发皿蒸发量平均每年减少4.47mm,各季节的蒸发皿蒸发量除秋季变化不显著外,其它各季以0.55-1.83mm/a的速率减小,其中春季减幅最大,其次是夏季,冬季减幅最小;日照时数的减少导致了气温日较差变小和空气饱和差的减小,是造成该研究区域蒸发皿蒸发量减小的主要原因.
Based on the data of 20cm pan evaporation and its impact factors over Lake Qinghai basin from 1961 to 2007, the trend was analyzed through Mann-Kendall nonparametrie test methods and grey incidence analysis. The main resalts were as follows： Significant negative trend of pan evaporation over Lake Qinghai basin was detected, with the decrease rate of 4.47mm per annum, and except for autumn, all season had the negative trends, with the decrease rate from 0.55 to 1. 83mm per annum, especially in spring, then summer, while winter decrease was tiny. Decreases of the hours of sunshine that were mainly caused the decrease of pan evaporation, have resulted into decreases of the diurnal temperature range and the average vapor pressure deficit.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2010年第4期616-624,共9页
Journal of Lake Sciences
基金
教育部新世纪优秀人才支持计划项目(NCET-08-0056)
国家科技支撑计划课题"十一五"项目(2007BAC30B02)资助
关键词
青海湖流域
蒸发皿蒸发量
影响因素
变化特征
Lake Qinghai basin
pan evaporation
impact factors
change characteristic
