1992年西藏中部初夏干旱的环流特征分析

１９９２年初夏西藏中部沿江河谷地区、昌都地区及那曲西部出现严重干旱。分析表明，副高位置偏南，北跳偏迟，高原及周边地区从春到夏的环流调整偏迟；印度季风低压初上高原时间推迟；切变线系统偏弱、位置偏北等，是造成初夏干旱的主要环流背景。

An Analysis of the General Circulation of the Early Summer Drought in Central Xizang, 1992

Serious drought occured in the central area of Xizang Autonomous Region in the early summer of 1992. Analyses show that the main circulation backgrounds are as the following. The subtropical high laid further south ,while its seasonal movement northward was much later. The circulation over the Qinghai-Xizang Plateau adjusted later from spring to summer. The India monsoon low deepened eruptively later, and its intensity was weaker. When the south Asia high first reached the Qihai-Xizang Plateau, it's delayed. The system of shear lines was weaker and laid to the north.