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投稿时间:2007-03-12 修订日期:2008-03-25
投稿时间:2007-03-12 修订日期:2008-03-25
中文摘要: 在GCMS(大气环流模式)中,降水空间分布描述在陆面水文参数化中非常重要。利用1998—20
03年淮河流域一个网格区域内32个站夏季逐小时降水资料,分析降水在区域内
统计特征,并利用统计特征及一个随机降水离散方案实现平均降水强度在区域内分配。结果
表明,在区域内降水空间分布是非均匀的,区域内的平均降水强度和区域内降水分布面积之
间有密切关系,取一定平均降水强度间隔,降水分布面积和发生频率满足固定的分布形态。
随机降水离散方案可以较好实现降水在区域内分配。
Abstract:The spatial variability of precipitation distribution is important for
land surface hydrology parameterization of GCM. By use of intensified hourly da
ta over Huaihe basin during 1998-2003 summer, an analysis is made to study the s
patial distribution of precipitation over this area. Results show that the preci
pitation spatial distribution is heterogeneous with a close relation to the aver
age precipitation intensity and coverage area. Statistical evidence suggests tha
t PDF (probability density function) of coverage area and occurrence frequency p
robably presented stable mode with properly interval mean rain intensity. The di
screte scheme of random precipitation can be used successfully to generate the p
recipitation distribution in sub grid.
keywords: precipitation distribution heterogeneity mean rain intensity cover
age area stochastic precipitation discrete scheme
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基金项目:国家自然科学基金面上项目(40375026)、江苏省高校研究生创新计划
项目、中国科技基础研究前期研究专项(2002ccd00100)资助。
引用文本:
周文艳,郭品文,罗勇,程兴无,黄昌兴,2008.淮河流域夏季降水空间变率研究[J].气象,34(8):51-57.
Zhou Wenyan,Guo Pinwen,Luo Yong,Chen Xinwu,Huang Changxing,2008.Spatial Variation of Summer Precipitation over Huaihe River Basin [J].Meteor Mon,34(8):51-57.
周文艳,郭品文,罗勇,程兴无,黄昌兴,2008.淮河流域夏季降水空间变率研究[J].气象,34(8):51-57.
Zhou Wenyan,Guo Pinwen,Luo Yong,Chen Xinwu,Huang Changxing,2008.Spatial Variation of Summer Precipitation over Huaihe River Basin [J].Meteor Mon,34(8):51-57.