The result enunciation:In spring high sky strong wind is result in southeast region in Yunnan of one of the important factors of the unsteady la yer knot of atmosphere, the weather system tr.

Sensitive experiments were performed by using a regional climate model with p-σ incorporated coordinate to investigate the impacts of the uplift of the Tibetan Plateau on the East Asian subtropical westerly jet(EAWJ).

They are (1) preparation stage of Subtropical westerly jet (from May to September); (2) Development stage of jet from October to March; (3) the jet disappearing and replacing by west pacific subtropical high from May to September.

Utilizing the radiosonde observation data during the 30 years(1961-1991),we calculate the vertical 16 layers distribution of subtropical westerlies jet in winter,and on the basis of the distribution model to regress the main pluvial regions year by year(according to two standards,i.

The monthly wind field of NCEP/NCAR reanalysis data is used to define an intensity index of the East Asia subtropical westerly jet, which can reasonably reflect the impact of the East Asia subtropical westerly jet on summer precipitation in North China.