近30a来蒙古乌布苏诺尔湖水位的年际变化

Interannual Changes of Ubsa Nor Lake Level in Recent 30 Years

从地气耦合的角度出发，利用地震、地温等资料，并结合ＥｌＮｉｎｏ事件的发生和地球自转的变化，对蒙古乌布苏诺尔湖（ＵｂｓａＮｏｒ）的水位变化作一初步分析．结果表明：乌布苏诺尔湖水位近３０ａ年来总的来说是呈上升趋势．６０年代中期水位较低，但水位呈波动式上升，从１９７７年开始水位迅速下降，１９８２年降到最低水位，而后水位持续上升．１９８６年以后，一直保持高水位．乌布苏诺尔湖水位年际变化与该湖周围地区的地震发生、ＥｌＮｉｎｏ事件和地球自转变化有很好的对应关系．这是地球整体性质变化的不同反映，地震之后０．５～２ａ内水位均有回升．地震只是水位回升前的一个信号，并不是引起水位变化的原因．地热的异常释放导致后期降水增多。

Based on earth atmosphere interactions, the change of Ubsa Nor lake level was analyzed togther with the earthquakes, soil temperature, earth rotation data and El Nino events. The results show that the trend of Ubsa Nor lake level kept going up in recent 30 years. In mid 60s, the level remained at a low stage,while it was in wave motion increase. Since 1977, the level had dropped down rapidly ,it reached the lowest point in 1982. After that, it turned to rise again, and since 1986, the level has stayed at a high position. Ubsa Nor lake level change had close relations with earthquake around the lake, El Nino event and earth rotation. All of these were the results of the earth system activity as a whole. There was lake level rising 0.5～2 years after an earthquake. Earthquake was a pre signal of lake level rising, but it was not the cause of the level rising. More precipitation produced by geo heat flux was the true reason of the level rising.