Characteristics of Thermally-Induced Near-Surface Flows over An Enclosed Crater: Observations of the Meteor Crater Experiment(METCRAX)  

作　　者：WANG Lin-Lin GUO Xiao-Feng WAN Bing-Cheng 

机构地区：[1]State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics, Chinese Academy of Sciences

出　　处：《Atmospheric and Oceanic Science Letters》2014年第2期162-167,共6页大气和海洋科学快报（英文版）

基　　金：supported by Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA05110104);support of the State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences (Grant No. LAPC-KF-2009-02)

摘　　要：Meteorological measurements of the Meteor Crater Experiment(METCRAX) were used to analyze the characteristics of the thermally-induced flows over an enclosed crater(Arizona, USA). Despite its relatively small size, this crater acts as an effective wind shelter. Daytime upslope winds and nocturnal downslope flows are regularly observed on its west/east sidewalls. The times of diurnal wind-direction shift(i.e., around sunrise and sunset) were slightly mismatched between the sites based on the east and west sidewalls, owing to the crater's shadowing effects. Under conditions of relatively weak synoptic forcing, the nocturnal downslope flows prevail throughout the night, despite quite a low wind velocity near the surface. ?Meteorological measurements of the Meteor Crater Experiment（METCRAX） were used to analyze the characteristics of the thermally-induced flows over an enclosed crater（Arizona, USA）. Despite its relatively small size, this crater acts as an effective wind shelter. Daytime upslope winds and nocturnal downslope flows are regularly observed on its west/east sidewalls. The times of diurnal wind-direction shift（i.e., around sunrise and sunset） were slightly mismatched between the sites based on the east and west sidewalls, owing to the crater＇s shadowing effects. Under conditions of relatively weak synoptic forcing, the nocturnal downslope flows prevail throughout the night, despite quite a low wind velocity near the surface. ？

关 键 词：atmospheric physics mountain meteorology local thermal circulation diurnal behavior 

分 类 号：P185.83[天文地球—天文学]