南极中山站附近冰盖近地面层湍流参数的观测研究  

TURBULENT PARAMETERS OF THE NEAR SURFACE LAYER OVER THE ICE SHEET NEARBY ZHONGSHAN STATION,EAST ANTARCTICA

作　　者：林忠[1] 卞林根[1] 马永锋[1] 逯昌贵[1] 

机构地区：[1]中国气象科学研究院,北京100081

出　　处：《极地研究》2009年第3期221-233,共13页Chinese Journal of Polar Research

基　　金：国家科技支撑计划(2006BAC06B05);国家海洋局国际极地年IPY资助项目

摘　　要：利用2007/2008年中国第24次南极考察队在南极中山站附近冰盖上观测试验获得的湍流脉动及相关资料,对原始资料通过坐标旋转订正后,应用涡动相关法计算分析了冰盖近地面层的湍流强度(I)、稳定度参数(z/L)、摩擦速度(u*)、拖曳系数(Cd)、地表粗糙度(z0)及动量通量(τ)和感热通量(H),并与空气动力学方法的计算结果进行对比。结果表明,Louis方案能够较好地模拟近地面层湍流通量;在平均状态下,全天雪面以感热形式从大气获得净的能量;近中性层结下地表粗糙度z0为4.54×10-4m,拖曳系数Cd=1.7×10-3,在非中性条件下,稳定度越小Cd越大,反之,则稳定度越大Cd越小。Based on the eddy covariance measurements and the gradient observations in the near surface layer during the summer of 2008, The characteristics of surface turbulent parameters of the ice sheet nearby Zhongshan station over the Antarctica are presented. After performing the quality control with the triple rotation method and planar fit technique, turbulent intensity （I）, stability parameter （z/L）, surface friction velocity （u,）, drag coefficient （Cd）, surface roughness （z0）, momentum flux （7） and sensible heat flux （H） are calculated by using eddy correlation method and compared with the results of aerodynamic method. The results show that the Louis scheme can simulate the turbulent fluxes near surface layer preferably over the Antarctic ice sheet; the energy snow surface obtained from atmosphere is more than the energy surface released to atmosphere in the form of sensible heat flux; surface roughness z0 is 4.54× 10^-4 m and drag coefficient Cd is 1.7 × 10^-3 in the near-neutral conditions; Cd increases （decreases） with the decreasing （increasing） of the stability in the non-neutral stratifications.

关 键 词：南极 中山站 湍流特征参数 湍流通量 涡动相关法 空气动力学方法 

分 类 号：P433[天文地球—大气科学及气象学]