敦煌戈壁地区地气温差变化特征分析

利用敦煌双墩子戈壁试验站2008年12月1日至2009年12月31日的塔站资料,分析了该地区地气温差的概率分布、日变化、日际变化、年变化和典型天气下的变化特征。结果表明：1）地气温差变化幅度较地温和气温小,分布在-1度附近有一个非常明显的峰值,观测期间出现的最小温差为-13.78℃,最大温差为35.59℃,平均温差为4...

The variation characteristics of difference between surface and air temperature in Dunhuang Gobi

Based on the micrometerology data observed at Dunhuang Gobi Station during the period from Dec.2008 to Dec.2009,we analyzed the difference between land surface and air temperature(simply as Ts-Ta).The characteristics of the probability distribution of Ts-Ta in the arid region were calculated.The diurnal,inter-diurnal,and annual variation feature have also been analyzed.The results indicated that:(1) In this region,the range of Ts-Ta was smaller than that of surface and air temperature,near the-1℃,there was a obvious peak.During the observation,the Ts-Ta minimum was-13.78℃ while maximum was 35.59℃,and the average was 4.05℃.(2)The diurnal variation was regular,positive in daytime,negative in night and symmetric about 12:00.(3) The diurnal variations of Ts-Ta in different seasons were the same in trend,but different in range.The Ts-Ta was the highest in June and lowest in December.(4) The Ts-Ta was quite different under the different weather conditions(sunny,cloudy and duststorm),they had their own characteristics.