QBO Analyses of Precipitation in China from 1986 to 1995

During the last ten years, the interannual changes of the precipitation distribution tendency in eastern China are characteristic of QBO. The precipitation in even numbered years is more than normal in central China, and less in northern and southern areas whereas the precipitation in odd numbered years is contrary, more precipitation in the central area, and less in northern and southern parts. The feature of precipitation change in Changjiang-Huaihe River basin is the most obvious. The analyses show that QBO feature of precipitation has relations with West Pacific subtropical high and cold air actions. Generally in the even numbered years, subtropical high is to the north of its normal position, the zonal circulation of Asia develops, and corresponding rain belt maves northward. The condition for odd numbered years is contrary, the subtropical high is southward, meridional circulation of Asia develops, and the rain belt moves southward, the precipitation in Changjiang-Huaihe River basin is more than normal