1470——1979年中国旱涝与厄尼诺事件

THE RELATIONSHIP BETWEEN ELNINO PHENOMENA(1470-1979)AND DRYNESS AND WETNESS OF CHINA

本文通过中国120个站近500年旱涝等级资料,以及同期97次厄尼诺事件的分析研究,结果发现在厄尼诺事件爆发时,我国长江流域及东北东部易有洪涝灾害;华北北部、内蒙东部、青藏高原北部多发生干旱;青藏高原南部、汉水流域和贵州等地则无明显旱涝。旱涝型序列分析表明,厄尼诺事件的发生我国易出现北旱南涝或南北旱、长江流域涝的情况,而全国涝的频数则大大减小。

In this paper, we have researched by using the Dryness and wetness grades series of near500 years of 120 observing stations in China and 97 ELNINO phenomena in the same time.We have found that, while ELNINO outbreak, flood-waterlogging easily occur in theChangjiang River valley and the east of Northeast China, and the drought always take placein the north of Northern China, the east of Inner mongolia and the north of Qinghai-Xizangplateau,and the Dryness and wetness damage are not evident in the south of Qinghai Xijianplateau,Hanshui River valley and Guizhou etc. The analyses of Dryness and wetness type se.ries show that, while ELNINO phenomena occurr, it is easily appeared that north China isdrought while south China is water logging, or south and north China is drought whileChangjiang River valley is water logging, but the frequencies of nationwide water logging aredecreased.