Research on the Micro-climate Characteristic Differences of Different Underlying Surface in the Hyper-arid Zone in Summer
The eigenvalues including daily variation amplitude,and vertical variation of air temperature,ground temperature,relative humidity,wind speed,and evaporation in 5 different land types were analyzed based on the observation of micro-climate factors.The results indicated that:the air temperature,wind speed,evaporation decrease progressively in the order of desert,gobi,cotton fields,corn fields,however,relative humidity increase gradually in that order.Generally,with the increase of height,wind speed of each surface decreases,and the ground temperature declines in company with depth.Except for maize field,air temperature and relative humidity of each surface become bigger,as the height builds up.Evaporation of five surfaces at night reduces abundantly,particularly the decline proportion of oasis,which is 86％.The ecotone with the transitional nature is similar to the desert,gobi in the climate eigenvalue and its change trend,amplitude.Even because of Gobi's relatively high altitude,the eigenvalue and changes amplitude of factors of ecotone are higher than that of gobi,lying between the desert and cotton field.For instance,the ecotone's air temperature is higher than gobi,cotton field,and lower than desert.Owing to the differences of water and vegetation coverage,the correlation between air temperature and ground temperature of desert,gobi are poorer; the maize and cotton field are in the middle; the ecotone is the best.
国家科技期刊平台
NSTL
万方数据
维普
