| 青藏高原季风期降水的日变化 |
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| 作者姓名： | Liu Liping Feng Jinming Chu Rongzhong Zhou Yunjun K. Ueno |
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| 作者单位： | Liu Liping Chinese Academy of Meteorological Sciences，Beijing 100081 Feng Jinming Chu Rongzhong and Zhou Yunjun Cold and Arid Regions Environmental and Engineering Research Institute，Chinese Academy of Sciences，Lanzou 730000 K. Ueno The University o |
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| 基金项目： | State Key Basic Program: Research on the formation Mechanism and Prediction Theory of Hazardous Weather over China, the National |
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| 摘 要： | 利用1998年夏季GAME－TIBET IOT期间的探空、降水和雷达资料分析了季风期降水和CAPE、LCL热力参量的日变化及其之间的关系。降水的日变化很明显，最大的降水和CAPE的最大值出现在同一时间段。6km和8.5km高度内的大气层结在大部分时间是不稳定的。0400－0800时间内6km以下9km以上的稳定层结阻碍了对流系统的发展，降水的日变化与这些热力参数的日变化有关。同时，利用三维云模式模拟了降水的日变化和水汽及温度对降水的影响，云模式再现了降水和回波强度的最大和最小值，晚上低层的高湿度是影响降水的重要因素。
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| 关 键 词： | 青藏高原 日变化 云模式 季风 降水 1998年 雷达资料 探空资料 |
| 收稿时间： | 21 March 2001 |
The diurnal variation of precipitation in monsoon season in the Tibetan Plateau |
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| Liu Liping,Feng Jinming,Chu Rongzhong,Zhou Yunjun,K. Ueno.The diurnal variation of precipitation in monsoon season in the Tibetan Plateau[J].Advances in Atmospheric Sciences,2002,19(2):365-378. |
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| Authors: | Liu Liping Feng Jinming Chu Rongzhong Zhou Yunjun K Ueno |
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| Institution: | Chinese Academy of Meteorological Sciences, Beijing 100081,Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzou 730000,Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzou 730000,Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzou 730000,The University of Shiga Prefecture, Shiga, Japan |
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| Abstract: | The soundings, precipitation and radar data obtained from IOP of GAME-TIBET in the summer of 1998 are used to analyze the diurnal variations of precipitation and thermodynamic variables CAPE. LCL and relationships between precipitation and thermodynamic variables in monsoon season. The diurnal variations of precipitation are obvious. Maximum precipitation appears at the same time when CAPE reaches its maximum value. The atmospheric layer between 6 km and 8.5 km is unstable in most of the time, the strong stable layers below 6 km and above 9 km from 0400 to 0800 resists the development of convective system. The diurnal variation of precipitation is related to diurnal variations of thermodynamic variables.The diurnal variation of precipitation and effects of water vapor and temperature on precipitation are simulated by a three-dimensional cloud model. The cloud model reproduces the maxima and minima of diurnal variations of precipitation and reflectivity. The high humidity in low level at night is the key factor for the precipitation. |
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| Keywords: | Tibetan Plateau Diurnal variation Cloud model |
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