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In this paper a parameterization of nonuniform distribution of precipitation has been madefrom the aspect of the maximum entropy theory.Results from theory and observation show that,the density function of precipitation depth on the subgrid scale over the grid area of a climate modelis the function of the gamma distribution.On this basis,the relative coverage of snow in the regionoccupied by vegetation in the grid area of a model is parameterized.Meanwhile the calculatedresults from the parameterizations are also compared with those from the empirical formulas bysome other meteorologists.Results show that it is feasible to parameterize the nonuniformdistribution of precipitation over the grid area at the angle of entropy theory. 相似文献
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大气环流创新模式-内外因耦合及三维地转平衡的全球大气环流模式和中尺度特大暴雨模式研究设想 总被引：4，自引：1，他引：3
任振球 《地球信息科学学报》2000,2(2):16-17
本文概述了大气环流创新模式方面的构思. 相似文献
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近代天文圆顶发展概况 总被引：2，自引：0，他引：2
综述了国内外天文圆顶的各种设计方案，比较了各种方案的性能，并介绍了为改善圆顶性能，降低造价进行的相关研究，以及为下一代巨型地面望远镜圆顶进行的预研究．结合目前正在研制的大天区多目标光纤光谱望远镜——LAMOST，简述了我国LAMOST望远镜圆顶的设计方案及其相关研究的概况。 相似文献
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Hydrogeology Journal - The ungauged Sugan Lake Basin represents a candidate area for development of a water transfer scheme to satisfy the water requirement of Dunhuang city in northwestern China.... 相似文献
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Nelder-Mead Simplex (NMS)算法是一种查找多元函数局地最小值的无微分算法,在现代科学计算中得到广泛应用,该文提出了一种对NMS算法的改进方法.改进后,大大简化了其计算过程,提高了该算法的收敛速度.利用改进后的算法对陆面过程参数进行了拟合计算,结果表明:改进的NMS算法对非线性公式具有非常高的拟合精... 相似文献
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Li Yanyao Yuan Yuan Sun Chengju Sun Ting Liu Xianglin Li Jianbin Fang Lei Fan Zhengqiu 《Stochastic Environmental Research and Risk Assessment (SERRA)》2020,34(2):435-446
Stochastic Environmental Research and Risk Assessment - The risk of heavy metal pollution in industrial zones has received great awareness, but few studies have focused on urban industrial zone of... 相似文献
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NUMERICAL EXPERIMENTS ON THE EFFECT OF INDIAN SUBCONTINENT VEGETATION COVER ON SUMMER MONSOON 
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下载免费PDF全文 In the present paper,a global two-dimensional climate model developed by Chinese Academy of Meteorological Sciences (CAMS) with inclusion of a simple parameterization of land surface processes developed recently by Zhang and Li is used to investigate the effect of vegetation cover of the Indian subcontinent on summer monsoon circulation and its rainfall.First of all,we carried out a control experiment in which the distribution of vegetation species was based on obser-vations.Then,with removal of the vegetation cover on the subcontinent,a sensitivity experiment was performed.For both of the experiments,the integrations were made from the beginning of April to the end of July.The results show that,after the vegetation was removed from the subcontinent,the monthly mean updraft and the monsoon circulation to the south of the Plateau was weakened in June and July.Especially,the change was more manifest in June.Also,in the south side of the Plateau,the easterly component was strengthened in the lower troposphere,the monsoon rainfall was reduced over the central India.Moreover,the rainfall was obviously reduced over the southern India from the end of June to the beginning of July. 相似文献