冬季高原积雪异常与1998年长江洪水关系的分析

The Analysis of Correlation between the Inundation of the Changjiang River Valley in 1998 and the Anomaly Snow Cover of the Qingzang Plateau in Winter

冬季青藏高原积雪与我国夏季降水 ,特别是长江流域降水有着一定的相关关系。1 998年长江洪水与冬季高原积雪异常有关 ,这在春夏季 5 0 0 h Pa平均高度场上有相应的反映。但由于受高度场的年际和年代际异常变化的影响 ,使它们之间的关系变得更加复杂。

There is a good correlation between snow cover of the Qingzang Plateau in winter and the summer rainfall in China,especially in the Changjiang River valley.The inundation of the Changjiang River valley in 1998 was closely related the anomaly snow cover of the Plateau in winter, and the situation was a reflection of 500hPa mean height field in spring and summer.But its correlation effected by the interannual and decadal variation of 500hPa mean height field is complicated.