Climatological characteristics , which can provide some drought or flood years with large - scale background , are investigated for large - scale water vapor transport over asian - australian monsoon region based on vertically integrated water vapor flux by pentad from 1980 to 1997 . at the same time , the differences of moisture transport over the yangtze river basin between drought and flood and the moisture budgets over eastern china from april to september are examined . major results are as follows : i 使用1980 ? 1997年垂直积分的整层水汽输送通量资料，从气候平均的角度分析了亚澳季风区大尺度水汽输送演变和偏南风水汽输送在东亚地区推进的气候特征，为研究异常年份旱涝事件的产生提供了相应的大尺度背景；同时还讨论了长江流域旱涝年水汽输送的差异以及4 - 9月我国东部各区域的水分收支情况。
2.
The somali jet and the south china sea ( scs ) cef in the lower level play an important role in the onset of the south china sea summer monsoon ( scssm ) . the somali jet is rapidly enhanced two pentads prior to the onset of scssm , thus accelerating the eastward extension of the westerly over the bay of bengal and leading to the eastward retreat of the western pacific subtropical high ( wpsh ) 低层的索马里和南海越赤道气流对南海夏季风的爆发有至关重要的作用，在南海夏季风爆发前2候，索马里急流有一次迅速的增强，这一增强有利于加速孟加拉湾地区西风的向东扩展，并使控制在南海的西太平洋副高东撤；同时，南海越赤道气流的迅速增强也加速副高的北上，共同促使南海夏季风全面爆发。
