Comparison of Atmospheric Characteristics of Near-Surface Layer between Oasis and Desert Background in Summer
By using the observed data,the differences of atmospheric characteristics of the near -surface layer between oasis and its surrounding Gobi are analyzed in this paper,and the microclimate features in oasis eco - system on the background of Gobi were discovered. As a result,it is revealed that oasis has the effects of decreasing temperature,keeping humidity and wind shielding. The temperature in ground surface and near - surface layer is obviously lower,the atmospheric humidity in near - surface layer is larger and the wind velocity and friction velocity in near-surface layer are smaller in the oasis,as compared with those in its surrounding Gobi. The sensible heat in oasis is only 20% of that in Gobi,and the latent heat in oasis is 10 times that in Gobi. At the same time,there is a considerable down-ward vertical motion over the oases,which contributes to the transportation of energy and vapor in oases. The Bowen ratio of oasis is about 1/20 that of Gobi,showing an obvious difference in climatic features between oasis and Gobi.
oasisbackground of deserlnear-surface layermicroclimate featuresBowen ratio
NETL
NSTL
万方数据
维普
