土壤温度变化在绿洲及沙漠近地层能量平衡中的作用分析  

ANALYSIS ON THE CONTRIBUTION OF SOIL TEMPERATURE VARIATION TO THE ENERGY BALANCE AT DESERT AND OASIS SURFACE LAYER

作　　者：韩博[1] 吕世华[1] 奥银焕[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,兰州730000

出　　处：《太阳能学报》2010年第12期1628-1632,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学重点基金项目(40633014);国家自然科学基金项目(40975007)

摘　　要：利用2005年夏季在金塔绿洲附近获得的沙漠和绿洲中心点的湍流、辐射等观测资料,分析了这一时段内各观测点的主要能通量变化规律。结果表明,在沙漠点分析能量闭合时必须考虑土壤热储的作用。而在绿洲中心点,虽然从平均日变化上也可看到与浅层土壤热储较为一致的不平衡能量项,但二者在8:00～11:00间存在显著差异。分析指出此时的土壤增温可能是由于深层土壤中的水蒸气向上移动进入到浅层土壤并凝结放热造成的。Energy flux at desert and oasis center around JinTa oasis was analyzed by using the energy balance equation based on the turbulent and radiation flux data observed on 2005 summer. The results showed that at desert, the energy storage in the shallow soil layer was very important to the imbalanced energy flux. At oasis center, although the variability of soil temperature at 0.05m depth was similar to the imbalanced energy flux, there were evident differences during the 8：00 am to 10：00 am period. After the soil moisture was considered, it was suggested that the water vapor of soil could be moved from deep layer into shallow layer and condensed there, thus causing during that period.

关 键 词：能量闭合 土壤温度 土壤湿度 土壤热储 

分 类 号：TK521.2[动力工程及工程热物理—热能工程]