NUMERICAL STUDY ON THE LOCAL WIND STRUCTURES FORCED BY THE COMPLEX TERRAIN OF QINGDAO AREA

In this paper, some 2-D features of the down- and up-slope winds and sea-land-breeze generated over the complex terrain of the Qingdao area and the interaction between them are numerically analysed by use of a 2-D non-hydrostatic mesoscale model. The simulated results in the west-east vertical cross-section show that (1) when the large-scale wind is a southerly gentle one, the generated easterly down-slope wind is much stronger than with an opposite background wind, and the down-slope wind can trigger and intensify the land breeze corresponding to the eastern coast of Jiaozhou Bay; (2) a gentle westerly background wind will reduce the eastward sea breeze and up-slope wind during the daytime due to a cold advection, but shows a little effect on the mesoscale circulation formed in the nighttime.