( 3 ) when the ah encournter the inter - annual variation , the anomaly of the raining in the area of asia - australia has some characters as follows : the main raining bands is distributed in these two areas : the area that is from the south of changjiang , crossing the south of japan ' s peninsula , to the west - northward pacfic ( aroud 30 n ) , and the area that is in the surface of tropical ocean of the north - hemisphere ( aroud 10 n ) . in the years of stronger ah , the raining in these two area is more compared to the years of the weaker ah 其中，南半球澳大利亚地区( 5 30 s )整个对流层基本上为一致的强异常下沉气流，赤道上高低层越赤道气流异常偏强， 10 n附近为强异常上升气流，季风经圈环流异常偏强； 20 n附近为强异常下沉气流， hadley环流异常偏强； 30 n为强异常上升气流， ferrel环流异常偏强： 45 n附近为异常下沉气流，次hadley环流异常偏强。当澳高减弱时，情况则与此相反。
