【摘 要】
：
利用2002-2012年的逐日降水资料、卫星资料(包括红外卫星云图、TBB、TZT等)、常规观测资料等,采用统计分析和数值诊断分析方法,分析了山西省降雪天气的云型特征及云系发展原因.结果表明:依据卫星云图特征,可以将造成山西省降雪天气的云系概括为高空槽云系、锋面云系、高空急流云系、螺旋状云系、叶状云系等五种.不同云系生成在不同的环流背景下,在其影响下,造成的降雪量级、范围及持续时间均不同.但无论是
【机 构】
：
山西省气象台,太原030006 国家卫星气象中心,北京100081
【出 处】
：
2013年全国卫星应用技术交流会暨卫星天气应用平台技术研讨会
论文部分内容阅读
利用2002-2012年的逐日降水资料、卫星资料(包括红外卫星云图、TBB、TZT等)、常规观测资料等,采用统计分析和数值诊断分析方法,分析了山西省降雪天气的云型特征及云系发展原因.结果表明:依据卫星云图特征,可以将造成山西省降雪天气的云系概括为高空槽云系、锋面云系、高空急流云系、螺旋状云系、叶状云系等五种.不同云系生成在不同的环流背景下,在其影响下,造成的降雪量级、范围及持续时间均不同.但无论是哪种云系影响,较大降雪均出现在黄褐色或红色云团内.降雪一般出现在TBB小于240 K的冷云团内、TBB等值线梯度最大处靠近中心一侧,且TBB大小与未来6h或1h降雪量关系密切;对流层上层水汽含量的增加,是降雪出现的先兆信号,水汽含量大值区与未来6h大的降雪落区对应,且先于降雪出现,对预报降雪有指示意义.云系的发展加强与低层暖湿气流输送、辐合上升、地形动力抬升有着密切关系.
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