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气象:2011,37(11):1389-1394
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四川盆地降水云系飞机云物理观测个例分析
(1.四川省人工影响天气办公室,成都 610072;2.河北省气象科学研究所,石家庄 050021;3.河北省人工影响天气办公室,石家庄 050021)
Case Analysis of Microphysical Characteristics of Precipitation Cloud System in Sichuan Basin
(1 Weather Modification Office of Sichuan Province, Chengdu 610072;2 Hebei Institute of Meteorological Sciences, Shijiazhuang 050021;3 Weather Modification Office of Hebei Province, Shijiazhuang 050021)
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投稿时间:2010-10-30    修订日期:2011-05-31
中文摘要: 利用2008年10月26日晚至27日凌晨成都上空连续两架次飞机穿云观测资料,分析了探测云系的云物理特征和降水机制,以期了解四川盆地降水形成的云物理过程。结果表明:探测云系为上冷下暖的混合云系,云系深厚,云顶温度在-10℃左右,0℃层较高。云系中暖层厚,约3200 m;过冷层较薄,约1800 m。在过冷层中,从云顶往下,大云粒子谱和降水粒子谱明显拓宽。在暖层中,降水粒子的浓度和尺度减小。冰晶和过冷水的存在使得冷云过程得以发动,配合暖层中的暖云过程,降水现象得以实现。而过冷水不够充沛,形成的降水粒子不多,同时暖层中液态水含量少,供水不充分,使得地面降水强度不大,形成了小雨。
Abstract:Using the airborne observation data from two continuous flights on 26 and 27 October 2008, this paper analyzes the cloud microphysical characteristics and precipitation mechanisms of the observed cloud system to reveal the microphysical process of precipitation in Sichuan Basin. The results show that: (1) The observed cloud system is a deep mixed cloud system, with cold in the upper layer and warm in the lower layer. The cloud top is around -10℃, and the 0℃ layer is high. The warm layer is deep (around 3200 m), while the cold layer is correspondingly thin (around 1800 m). (2) From top to bottom in the super cooled layer, the size spectra of the large cloud particles and precipitation particles become remarkably wider. (3) In the warm layer, the precipitation particles become smaller and decreased. (4) The existence of ice nuclei and super cooled water initiates the cold cloud process. The latter coordinates with the warm cloud process in the warm layer, and then the ground precipitation achieves. However, super cooled water is not abundant, and the precipitation particles formed are not plentiful, as well as the liquid water content in the warm layer is small, thus, the ground precipitation is small.
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基金项目:中国气象局2010年面上推广项目(CMATG2010M21);2010年中国气象局成都高原气象开放实验室基金(LPM2010005);四川省气象局2010 重点 05和四川省气象局2010 青年 13共同资助
引用文本:
王维佳,刘建西,石立新,刘 平,张世林,董晓波,2011.四川盆地降水云系飞机云物理观测个例分析[J].气象,37(11):1389-1394.
Wang Weijia,Liu Jianxi,Shi Lixin,Liu Ping,Zhang Shilin,Dong Xiaobo,2011.Case Analysis of Microphysical Characteristics of Precipitation Cloud System in Sichuan Basin[J].Meteor Mon,37(11):1389-1394.