青藏高原下垫面热力结构遥相关影响特征Ⅰ:资料分析(英文)

被引：2
|
作者：
周玉淑
邓国
高守亭
徐祥德
机构：
来源：
Advances in Atmospheric Sciences | 2002年 / 04期
关键词：
青藏高原; 热力异常; 长江中下游地区; 旱涝异常;
D O I：
暂无
中图分类号：
P421.3 [大气结构];
学科分类号：
摘要：
探讨了前期青藏高原下垫面热力结构异常对后期长江中下游地区降水的影响。通过资料分析揭示出长江中下游地区夏季降水异常前期冬、春季青藏高原下垫面三维热力结构强信号特征,即长江中下游夏季旱涝前期高原南部和北部各层次的地温距平呈反位相分布。从地面0cm到地下320 cm的地温距平分布为:涝年高原偏南部(30°N以南)为正,中部和北部(30°N以北)为负,旱年时相反。其中地温距平的大值区在 40 cm到160 cm层之间。同时揭示了北半球环流型对青藏高原下垫面热力异常可能产生遥响应,并形成季尺度低频波的传播,从而影响长江中下游地区后期的降水,反映了遥相关是区域性旱涝形成的一个动力机制。资料分析结果表明前期青藏高原下垫面三维热力结构异常是后期长江中下游地区降水异常的重要原因之
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页码：583 / 593
页数：11
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