南疆沙漠腹地大气边界层湍流通量特征的观测研究  

Observational Research of the Turbulent Fluxes in the Atmosphere Boundary Layer in Desert Hinterland of South Xinjiang

作　　者：缪启龙[1] 李兰兰[1] 何清[1,2] 王晶[1] 温雅婷[1] 

机构地区：[1]南京信息工程大学江苏省气象灾害重点实验室,江苏南京210044 [2]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002

出　　处：《气象与减灾研究》2008年第3期15-21,共7页Meteorology and Disaster Reduction Research

基　　金：国家自然科学基金项目(编号:40775019);江苏省气象灾害重点实验室基金项目(编号:KLME-05004).

摘　　要：利用新疆塔中站2006年4月、8月的三维风速、温度和水汽脉动资料,运用涡旋相关法计算得到了春、夏季塔中10m高度的动量、感热和潜热通量。结果表明,塔中地区地表热量输送以感热输送为主。春季每天的最大感热通量变化范围为120—320W·m-2,月平均值为220W·m-2;夏季最大感热通量的变化范围为140—340W·m-2,月平均值为230W·m-2。感热通量值在夜间为负,白天为正,符号的改变出现在日出、日落前后。夏季潜热通量最大值一般为20—60W·m-2,平均值为27W·m-2,潜热通量比感热通量小一个量级。春季动量通量的平均值为-0.063W·m-2,夏季动量通量的平均值为-0.091W·m-2。日变化规律比较明显,日出后,动量向下传输增大,在09—10时(地方时)出现一个最大值,随后动量向下传输并开始减小。The data of three-dimensional wind speeds, temperature and water vapor pulsation in April and August 2006 in Tazhong station are calculated by the vortex correlation method to obtain the momentum flux, the sensible heat flux and the latent heat flux at 10 m height in spring and summer. The result shows that the surface heat primarily transfers by the sensible heat flux in Tazhong area. The daily maximum heat fluxes vary in the range of 120-320 W·m^-2,and the monthly average value is 220 W·m^-2 in spring; while in summer, the daily maximum heat fluxes vary in the range of 140-340W·m^-2, and the monthly average value is 230W·m^-2. Heat flux becomes negative at night and positive in daytime, and the sign changes at around sunrise or sunset. In summer, the latent heat flux is smaller than the sensible heat flux about one order of magnitude, with maximum varying in the range of 20-60 W·m^-2 and average of 27 W·m^-2. The momentum fluxes vary diurnally, with the mean values being respectively -0.063 W·m^-2 and -0.091 W·m^-2 in spring and in summer. The downwards momentum transmission increases after sunrise and reaches the maximum at 09：00-10：00 am.

关 键 词：沙漠腹地 感热通量 潜热通量 动量通量 

分 类 号：P434.5[天文地球—大气科学及气象学]