"空中调水"设想的可行性研究

"空中调水"设想是改变雅鲁藏布大峡谷及其以北地形来改善向北水汽输送.根据气候资料和新建立的南亚季风指数,选择历史上最强的季风年,通过简便可行的计算方案来讨论这个设想在气象学上的可行性.初步诊断分析表明,在制约印度洋暖湿水汽通过雅鲁藏布大峡谷通道继续向北输送的因素中,地形阻碍固然重要,但与青藏高原地形有关的大尺度环流的辐合作用更为重要;而要改变大尺度环流则比改变局地地形更为困难.从气象学条件来看,即使改变了雅鲁藏布大峡谷及其以北地区的地形,也很难实现"空中调水"的设想.

Feasible Study of on the Envisagement of Transporting the Moisture from South to North Sides of the Himalayas

The Envisagement of transporting the moisture from south to north sides of the Himalayas is for improving the moisture transfer along the Great Yarlung Zangbo Canyon northwards. The strongest monsoon year is chosen by the climate data and the new South Asia Monsoon Index to be 1986. The above envisagement is diagnosed in this paper by a simple calculable way to discuss its feasibly in meteorology. The preliminary diagnostic analysis shows as the followings. Even if the topography blocking effects is an important factor for restricting the moisture transfer along the passage of the Great Yarlung Zangbo Canyon northwards, the convergence effect of large scale circulation related to the topography of Tibet Plateau is more important one. It is obvious that to change the large scale circulation is more difficult to alter the local topography. From the above, the envisagement of transporting the moisture from south side to north side of the Himalayas is very difficult to be practice, even though the topography of the Great Yarlung Zangbo Canyon and its north side has be changed.