Radiative effects of water clouds on rainfall responses to the large-scale forcing during pre-summer heavy rainfall over Southern China
Radiative effects of water clouds on rainfall responses to the large-scale forcing during pre-summer heavy rainfall over Southern China
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DOI：
10.1016/j.atmosres.2010.09.011
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发表时间：
2011
影响因子：
5.5
通讯作者：
Xinyong Shen;Yi Wang;Xiaofan Li
中科院分区：
文献类型：
--
作者：
Xinyong Shen;Yi Wang;Xiaofan Li
水云是降水系统的重要组成部分，其辐射效应可能对降雨过程产生重大影响。利用NCEP/GDAS大尺度资料，利用二维云分辨模式模拟了2008年6月3 ~ 8日华南地区的一次前夏暴雨过程，研究了水云对降水的辐射效应。在发病阶段，排除水云的辐射效应增加了平均降雨率，通过平均水凝物从损失到获得冰云的辐射效应的存在下，而它增加了平均降雨率，通过增加平均净凝结和平均水凝物损失在没有冰云的辐射效应。在发展阶段，去除水云的辐射效应，通过平均降水量从增加到减少的变化，增强了平均降雨量。在成熟阶段，水云辐射效应的消除通过减少平均净凝结而减弱了平均降水。排除冰云的辐射效应增强了平均降雨量的减少。在衰减阶段，水云辐射效应的消除通过增强净凝结增加了平均降雨量。
Water clouds are an essential ingredient of precipitation systems and their radiative effects may significantly impact rainfall processes. This study investigates radiative effects of water clouds on rainfall using a two-dimensional cloud-resolving model simulation of a pre-summer heavy rainfall event over southern China from 3 to 8 June 2008, forced with large-scale data from NCEP/GDAS. During the onset phase, the exclusion of radiative effects of water clouds increased the mean rain rate through the mean hydrometeor change from loss to gain in the presence of radiative effects of ice clouds, whereas it increased the mean rain rate through the increases in the mean net condensation and mean hydrometeor loss in the absence of radiative effects of ice clouds. During the development phase, the removal of radiative effects of water clouds enhanced the mean rainfall through the mean hydrometeor change from gain to loss. During the mature phase, the elimination of radiative effects of water clouds weakened the mean rainfall through the decreased mean net condensation. The exclusion of radiative effects of ice clouds enhanced the decrease in the mean rainfall. During the decay phase, the removal of radiative effects of water clouds increased the mean rainfall through the enhanced net condensation.