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地理科学  2003 

影响中尺度对流系统移动的知识发现

, PP. 579-584

Keywords: 青藏高原,中尺度对流系统,关联规则,知识发现

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Abstract:

空间数据挖掘是近年来迅速发展起来的面向应用的新技术。运用1998年夏季日本静止气象卫星(GMS)探测反演出的红外辐射亮温资料和国家卫星气象中心高分辨率有限区域分析预报系统产品中的数值格点预报资料(HLAFS)对青藏高原上的中尺度对流系统(MCS)进行了自动追踪。在此基础上,运用空间关联规则研究了移出高原的MCS与其环境场之间的关系,结果表明,在400hPa这一层次,等压面高度、相对湿度、涡度、散度、垂直速度这5个物理量是影响其移出高原的主要因子;而在500hPa层次,移出高原的MCS与等压面高度、相对湿度、温度、垂直速度和K指数关系密切。

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