Measurement of the pressure field on a mountain

摘要: Four microbarographs, accompanied by wind vanes and anemometers, were deployed on a mountain called Black Combe (height 600 m) in Cumbria during field experiment that took place Novemberer 1991. the aims of to measure small flow-induced pressure differences across relate these local wind. These may be used calculate directly drag exerted atmosphere Combe. The mean difference between pairs sites calculated over periods when speed is due hydrostatic caused height instruments. Removing this component reveals up 2 hPa. main result high correlation with quantity pu2/2, where p air density u speed. It shown holds for stratified fluid far upstream streamlines originate from levels similar speed. Although reliable data only obtained at three four stations, making assumption dynamic varies linearly surface enables an estimate made. average period estimated 3.6 Pa.