【作者】 蔡淼； 周毓荃； 朱彬；

【Author】 Cai Miao1,2 Zhou Yuquan 2(1. Nanjing University of Information Science and Technology,Nanjing,210044;2.National Meteorological Center,Beijing,100081)

【机构】 南京信息工程大学； 国家气象中心；

【摘要】 针对2008年4月11到12日一次北方层状云降水过程,将FY2C/D静止卫星反演的各云参数和地面同时段的雨滴谱仪的观测资料进行联合分析,发现:反演得到的各云参数对地面降水有一定的指示意义,一般降水发生前,云系发展,云顶抬升,云顶温度和tbb都降低,云光学厚度增大;其中云光学厚度与地面降水量和降水粒子数关系密切,成正相关,其相关性比云顶高度、云顶温度和tbb都好;一般光学厚度越大,地面降水越强,若云层光学厚度较小,即便云顶发展的很高,地面几乎无降水或降水较小。更多还原

【Abstract】 Aiming at a process of stratocumulus precipitation in north China from the 11 to 12 April,2008,the cloud parameters product retrieved by FY-2C/D are combined with the Parsivel observation in the same period of time. It is find that,the cloud parameters product retrieved indicated the precipitation on the surface. Generally speaking,before the rainfall,the cloud developed well,the top of cloud rose,both the temperature near the top of cloud and tbb reduced,and cloud optical thickness got larger. Cloud optical thickness was more related to precipitation and number of particles on surface. There existed a positive relationship between precipitation and cloud optical thickness. Compared to the top of cloud,the temperature near the top of loud and tbb,cloud optical thickness had a better relationship with precipitation on the surface. Where cloud optical thickness was larger,precipitation occured on the surface was stronger. Precipitation on surface didn’t occur or occurred small if cloud optical thickness was very small,although cloud rose high enough.更多还原