基于“黑格比”和“灿都”台风期间湍流数据的曳力系数和动力粗糙度长度参数化研究  

Parameterizations of drag coefficient and aerodynamic roughness length using the turbulence data collected during typhoons Hagupit and Chanthu

作　　者：张小华 毕雪岩[2] 高志球 刘长炜[3] 彭文武 曾智华 杨楠[1] 李煜斌 ZHANG Xiaohua;BI Xueyan;GAO Zhiqiu;LIU Changwei;PENG Wenwu;ZENG Zhihua;YANG Nan;LI Yubin(Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,School of Atmospheric physics,Nanjing University of Information Science and Technology,Nanjing 210044,China;Guangzhou Institute of Tropical and Marine Meteorology,China Meteorological Administration,Guangzhou 510640,China;Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies,School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai 510275,China;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Shanghai Typhoon Institute,China Meteorological Administration,Shanghai 200030,China)

机构地区：[1]南京信息工程大学,大气物理学院,气象灾害预测与评估协同创新中心,江苏南京210044 [2]中国气象局,广州热带海洋气象研究所,广东广州510640 [3]中山大学,大气科学学院,广东省气候变化与自然灾害研究重点实验室,广东珠海510275 [4]中国科学院,大气物理研究所,大气边界层物理与大气化学国家重点实验室,北京100029 [5]中国气象局,上海台风研究所,上海200030

出　　处：《热带海洋学报》2021年第2期1-6,共6页Journal of Tropical Oceanography

基　　金：National Key Research and Development Programs of Ministry of Science and Technology of China(2018YFC1506405,2018YFC1507404);National Natural Science Foundation of China(41275022,4167018,41975067,41675019)。

摘　　要：海面的曳力系数和空气动力学粗糙度长度是计算海气动量、感热和水汽通量交换必需的参数。基于在“黑格比”和“灿都”台风期间收集的涡动相关系统观测数据,文章研究了10m风速和摩擦速度之间、10m风速和曳力系数之间、以及10m风速和动力粗糙度长度之间的参数化关系。结果表明:曳力系数和摩擦速度及10m风速之间存在抛物线关系,动力粗糙度长度与摩擦速度及10m风速之间存在自然指数关系;临界摩擦速度为0.83m·s^(-1),临界10m级风速为23.69m·s^(-1)。The drag coefficient and aerodynamic roughness length of the sea surface are essential in calculating momentum,heat and water-vapor exchanges between the air and sea.With the observations collected by eddy covariance systems during typhoons Hagupit and Chanthu,we investigated parameterization relationships of 10-m wind speed with friction velocity,drag coefficient,and aerodynamic roughness length of the sea surface.Results show parabolic relationships between drag coefficient and friction velocity,and between drag coefficient and 10-m wind speed;results also show exponential relationships between aerodynamic roughness length and friction velocity,and between aerodynamic roughness and 10-m wind speed.We found that the critical friction velocity is 0.83 m·s^(-1)and critical 10m wind speed is 23.69 m·s^(-1).

关 键 词：空气动力学粗糙度 曳力系数 参数化 台风 黑格比 灿都 

分 类 号：P732.31[天文地球—海洋科学]