| RADIATIVE AND MICROPHYSICAL EFFECTS OF ICE CLOUDS ON A TORRENTIAL RAINFALL EVENT OVER HUNAN, CHINA |
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| 作者姓名： | 许凤雯 许小峰 崔晓鹏 王志 |
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| 作者单位： | Public Meteorological Service Centre of China Meteorological Administration, Beijing 100081 China;China Meteorological Administration, Beijing 100081 China;Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS) of Institute of Atmospheric Physics, Beijing 100081 China;Public Meteorological Service Centre of China Meteorological Administration, Beijing 100081 China |
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| 基金项目： | National Natural Science Foundation of China (40575029; 40775036; 40921160379) |
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| 摘 要： | The radiative and microphysical effects of ice clouds on a torrential rainfall event over Hunan,China in June 2004 are investigated by analyzing the sensitivity of cloud-resolving model simulations.The model is initialized by zonally-uniform vertical velocity,zonal wind,horizontal temperature and vapor advection from National Centers for Environmental Prediction(NCEP) /National Center for Atmospheric Research(NCAR) reanalysis data.The exclusion of radiative effects of ice clouds increases model domain mean surface rain rates through the increase in the mean net condensation associated with the increase in the mean radiative cooling during the onset phase and the increases in the mean net condensation and the mean hydrometeor loss during the mature phase.The decrease in the mean rain rate corresponds to the decreased mean net condensation and associated mean latent heat release as the enhanced mean radiative cooling by the removal of radiative effects of ice clouds cools the mean local atmosphere during the decay phase.The removal of microphysical effects of ice clouds decreases the mean rain rates through the decrease in the mean net condensation during the onset phase,while the evolution of mean net condensation and the mean hydrometeor changes from decrease to increase during the mature phase.The reduction in the mean rain rate is primarily associated with the mean hydrometeor change in the absence of microphysical effects of ice clouds during the decay phase.
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| 关 键 词： | radiative and microphysical effects ice clouds rainfall budget analysis cloud-resolving model simulation |
| 收稿时间： | 2011/1/18 0:00:00 |
| 修稿时间： | 2012/7/15 0:00:00 |
RADIATIVE AND MICROPHYSICAL EFFECTS OF ICE CLOUDS ON A TORRENTIAL RAINFALL EVENT OVER HUNAN, CHINA |
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| XU Feng-wen,XU Xiao-feng,CUI Xiao-peng and WANG Zhi.RADIATIVE AND MICROPHYSICAL EFFECTS OF ICE CLOUDS ON A TORRENTIAL RAINFALL EVENT OVER HUNAN, CHINA[J].Journal of Tropical Meteorology,2012,18(3):393-402. |
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| Authors: | XU Feng-wen XU Xiao-feng CUI Xiao-peng and WANG Zhi |
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| Institution: | Public Meteorological Service Centre of China Meteorological Administration, Beijing 100081 China;China Meteorological Administration, Beijing 100081 China;Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS) of Institute of Atmospheric Physics, Beijing 100081 China;Public Meteorological Service Centre of China Meteorological Administration, Beijing 100081 China |
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| Abstract: | The radiative and microphysical effects of ice clouds on a torrential rainfall event over Hunan, China in June 2004 are investigated by analyzing the sensitivity of cloud-resolving model simulations. The model is initialized by zonally-uniform vertical velocity, zonal wind, horizontal temperature and vapor advection from National Centers for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR) reanalysis data. The exclusion of radiative effects of ice clouds increases model domain mean surface rain rates through the increase in the mean net condensation associated with the increase in the mean radiative cooling during the onset phase and the increases in the mean net condensation and the mean hydrometeor loss during the mature phase. The decrease in the mean rain rate corresponds to the decreased mean net condensation and associated mean latent heat release as the enhanced mean radiative cooling by the removal of radiative effects of ice clouds cools the mean local atmosphere during the decay phase. The removal of microphysical effects of ice clouds decreases the mean rain rates through the decrease in the mean net condensation during the onset phase, while the evolution of mean net condensation and the mean hydrometeor changes from decrease to increase during the mature phase. The reduction in the mean rain rate is primarily associated with the mean hydrometeor change in the absence of microphysical effects of ice clouds during the decay phase. |
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| Keywords: | radiative and microphysical effects ice clouds rainfall budget analysis cloud-resolving model simulation |
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