玉树隆宝2014年冬季冻土积雪对陆气通量关键参数的影响分析  

Impact Analysis of Frozen Soil and Snow on Key Parameters of Land Atmosphere Flux at Longbao,Yushu in Winter 2014

作　　者：张海宏[1] 姜海梅[2] 周秉荣[1] 祁栋林[1] ZHANG Haihong;JIANG Haimei;ZHOU Bingrong;QI Donglin(Qinghai Institute of Meteorological Science,Xining 810001;School of Atmospheric Physics,Nanjing University of Information Science of Technology,Nanjing 210044)

机构地区：[1]青海省气象科学研究所,西宁810001 [2]南京信息工程大学大气物理学院,南京210044

出　　处：《气象》2019年第11期1550-1559,共10页Meteorological Monthly

基　　金：青海省科技厅项目(2018-SF-142);国家自然科学基金项目(41505006);公益性行业(气象)科研专项(GYHY201506001);青海省气象局科研项目“野外微气象观测数据质量控制及检验”共同资助

摘　　要：利用玉树隆宝湿地的观测资料,分析了未冻结、冻结和冻结有积雪覆盖三种情况下动量通量和感热通量的日变化情况,计算了三种情况下动量总体输送系数、感热总体输送系数、动力学粗糙度和热力学粗糙度,分析了附加阻尼和粗糙度雷诺数的关系,并将三种附加阻尼的参数化方案进行了比较,结果表明:冻结状态下动量通量和感热通量的日变化幅度最大,冻结有积雪覆盖时,动量通量和感热通量的日变化幅度最小。动量总体输送系数C D和感热总体输送系数C H的值在冻结时最大,冻结有积雪覆盖时最小,动力学粗糙度和热力学粗糙度在冻结状况下最小,冻结有积雪覆盖时最大。未冻结、冻结和冻结有积雪覆盖状态下,三种附加阻尼kB-1参数化方案中,幂函数型方案较为合适。Using the observation data from Longbao,Yushu of Qinghai Province,daily variations of momentum flux and sensible heat flux during unfrozen,frozen and frozen with snow covered periods are analyzed,momentum bulk transfer coefficient,sensible heat bulk transfer coefficient,aerodynamic roughness length,thermal roughness length are calculated,relationship between additional damping and roughness reynolds number are analyzed and three kB-1 parameterization schemes are compared.The results show that daily ranges of momentum flux and sensible heat flux are the biggest in frozen period and the smallest in frozen with snow covered period.Momentum bulk transfer coefficient C D and sensible heat bulk transfer coefficient C H are the biggest in frozen period and the smallest in frozen with snow covered period.Aerodynamic roughness length and thermal roughness length are the smallest in frozen period and the biggest in frozen with snow covered period.Power function type of three kB-1 parameterization schemes is the most suitable during unfrozen,frozen,and frozen with snow covered periods.

关 键 词：高寒湿地 总体输送系数 粗糙度 陆面过程参数化 

分 类 号：P404[天文地球—大气科学及气象学]