FY-2C资料进行云顶粒子热力学相态分析应用初探  

FY-2C DATA ANALYSIS OF CLOUD PARTICLE PHASE APPLICATION OF THERMODYNAMICS

作　　者：韦春霞[1] 黎云[1] 邓丽玲[1] 

机构地区：[1]河池市气象局,广西河池547000

出　　处：《云南地理环境研究》2011年第2期105-110,共6页Yunnan Geographic Environment Research

摘　　要：利用"9210"系统下发的FY-2C图像资料数字化信息,依据高云、中云、低云在可见光波段和红外波段具有不同的光谱特性,结合水汽通道和红外通道对密蔽云系的辐射特性,分析了2008年华南低温雨雪冰冻期间红外、水汽、可见光3个通道云系的辐射特征,发现了有利于识别水云、冰云和冰水混合云的方法。同时指出,对于密蔽云系,当水汽亮温值大于0℃而红外亮温值小于0℃时,云顶粒子的热力学相态为过冷却液态水的可能性大于冰晶结构的可能性。根据上述辐射特性分析制定了云类的识别方法。实例分析结果表明这种方法能较好地分离出易产生冻雨的云体中缺少成冰核的过冷却液态水云。Use of ＂9210＂ system issued FY-2C image data of digital information,based on its high cloud,cloud,low cloud in the visible and infrared bands have different spectral characteristics,combined with water vapor channel and the infrared channel on the dense cloud of radiation system characteristics of South China in 2008 during the snow and ice infrared,water vapor,three-channel visible radiation characteristics of cloud systems,found in favor of the recognition Ectocarpus,ice clouds and cloud ice mixing method.Also pointed out that department for the dense cloud,when the water vapor brightness temperature is greater than 0 ℃ and the infrared brightness temperature value is less than 0 ℃,the cloud thermodynamic phase state of particles through the cooling liquid is more likely than the possibility of ice crystal structure.According to the radiation characteristics of cloud systems developed identification methods.Example shows that this method can separate the prone body of freezing rain cloud over the lack of ice core cooling liquid water clouds.

关 键 词：FY-2C卫星 遥感监测 华南 云顶粒子 相态 

分 类 号：P45[天文地球—大气科学及气象学]