塔中近地层春夏季湍强和湍能变化的观测研究  

Observations on Turbulence Intensity and Turbulent Kinetic Energy of Surface Layer in Spring and Summer in Taklimakan Hinterland

作　　者：温雅婷[1,2] 缪启龙[1] 何清[3] 李兰兰[1,4] 

机构地区：[1]南京信息工程大学气象灾害省部共建教育部重点实验室,江苏南京210044 [2]解放军理工大学气象学院,江苏南京211101 [3]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [4]山东省气象局,山东济南250031

出　　处：《中国沙漠》2010年第2期439-444,共6页Journal of Desert Research

基　　金：气象灾害省部共建教育部重点实验室基金项目(KLME-050103);国家自然科学基金项目(40775019)资助

摘　　要：利用2006年4月和8月塔中地区近地层10m处的湍流资料,分析了该地区春夏季湍流强度和湍流动能的变化,同时对湍流动能供给率做了讨论。结果表明,在近中性层结条件下,3个方向的湍流强度均接近常数,而无因次扰动动能则随稳定或不稳定程度的增大也有增大趋势;在强不稳定层结条件时,热力湍能供给率明显强于机械湍能供给率,而处于稳定层结条件时,热力湍能供给率则减为负值,表现为抑制作用。Using the turbulent data obtained at the height of 10 m in Taklimakan hinterland,this paper analyzes the spring and summer variations characteristics of the turbulent intensity and the turbulent kinetic energy,discusses turbulent supply rate.The results are as follows：Under near neutral condition,the turbulent intensities in three directions are approximate constants,the dimensionless perturbation kinetic energy increases along with the increase of stable or the unstable degree;Under the unstable condition,the thermal turbulent supply rate displays stronger than the mechanical obviouly,under stable condition,the thermal turbulent supply rate reduces to the negative value,representing inhibition function.

关 键 词：塔克拉玛干 沙漠腹地 近地层 湍流强度 湍流动能 

分 类 号：P425.2[天文地球—大气科学及气象学]