| 青藏高原那曲地区一次对流云降水过程的特征分析 |
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| 引用本文： | 韩亚东,赖欣,孙凌.青藏高原那曲地区一次对流云降水过程的特征分析[J].高原山地气象研究,2022,42(3):67-74. |
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| 作者姓名： | 韩亚东 赖欣 孙凌 |
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| 作者单位： | 成都信息工程大学大气科学学院/高原大气与环境四川省重点实验室/气候与环境变化联合实验室, 成都 610225 |
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| 基金项目： | 国家自然科学基金项目（42075081，42075019）；国家重点研发计划（2018YFC1505702） |
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| 摘 要： | 利用雨滴谱和Ka波段毫米波云雷达等资料，针对2020年7月21日发生在那曲地区的一次对流云降水过程进行特征分析。结果表明:此次强对流云降水过程表现出明显的日变化特征，对流云在傍晚达到最强。强对流区内存在明显的上升气流和下沉气流，降水最强时雷达回波达到40 dBZ以上，降水过程中最大云顶高度为12 km，最小为720 m。那曲地区Gamma分布相对于M-P分布更适用于对流云小直径粒子（0~1 mm）的雨滴谱拟合，随着粒子直径增大，降水越来越不稳定。
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| 关 键 词： | 青藏高原 对流云降水 雨滴谱 微物理特征 |
| 收稿时间： | 2022-01-17 |
Characteristic Analysis of a Convective Cloud Precipitation Process in Naqu on the Tibetan Plateau |
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| Institution: | College of Atmospheric Sciences, Chengdu University of Information Technology /Plateau Atmosphere and Environment Key Laboratory of Sichuan Province/ Joint Laboratory of Climate and Environment Change, Chengdu 610225, China |
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| Abstract: | Using the raindrop spectrum and Ka band cloud radar data, the characteristics of a convective cloud precipitation process in Naqu on July 21, 2020 were analyzed. The results show that the precipitation process of the strong convective cloud showed obvious diurnal variation characteristics, and the convective cloud reached the strongest in the evening. There were obvious updrafts and downdrafts in the strong convection area. When the precipitation was the strongest, the radar echo reached above 40 dBZ, and the maximum cloud top height was 12 km, and the minimum was 720 m in the precipitation process. Compared with the M-P distribution, the Gamma distribution in Naqu was more suitable for the fitting of raindrop spectra of small-diameter particles (0~1 mm) of convective clouds, and the precipitation became more and more unstable with the increase of particle diameter . |
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