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引用本文:李岳坦,李小雁,崔步礼,伊万娟,张强,孙久虎.青海湖流域及周边地区蒸发皿蒸发量变化(1961-2007年)及趋势分析.湖泊科学,2010,22(4):616-624. DOI:10.18307/2010.0420
LI Yuetan,LI Xiaoyan,CUI Buli,YI Wanjuan,ZHANG Qiang,SUN Jiuhu.Trend of pan evaporation and its impact factors over Lake Qinghai basin from 1961 to 2007. J. Lake Sci.2010,22(4):616-624. DOI:10.18307/2010.0420
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青海湖流域及周边地区蒸发皿蒸发量变化(1961-2007年)及趋势分析
李岳坦1,2, 李小雁1,2, 崔步礼1,2, 伊万娟1,2, 张强3, 孙久虎4
1.地表过程与资源生态国家重点实验室 北京 100875;2.北京师范大学资源学院 北京 100875;3.中国科学院植物研究所 北京 100093;4.山东省国土测绘院 济南 250013
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.
关键词:  青海湖流域  蒸发皿蒸发量  影响因素  变化特征
DOI:10.18307/2010.0420
分类号:
基金项目: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
Trend of pan evaporation and its impact factors over Lake Qinghai basin from 1961 to 2007
LI Yuetan1,2, LI Xiaoyan1,2, CUI Buli1,2, YI Wanjuan1,2, ZHANG Qiang3, SUN Jiuhu4
1.State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing 100875, P. R. China;2.College of Resource Science Technology, Beijing Normal University, Beijing 100875, P. R. China;3.Institute of Botany, Chinese Academy of Sciences, Beijing 100093, P. R. China;4.Shandong Provincial Land Surveying and Mapping Institute, Jinan 250013, P. R. China
Abstract:
Based on the data of 20cm pan evaporation and its impact factors over Lake Qingbai basin from 1961 to 2007, the trend was analyzed through Mann-Kendall nonparametric test methods and grey incidence analysis. The main results were as follows; Sig-nificant negative trend of pan evaporation 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 mainly caused the decrease of pan evaporation, have resulted into decreases of the diurnal temperature range and the average vapor pressure deficit.
Key words:  Lake Qinghai basin  pan evaporation  impact factors  change characteristic
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