| 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* |
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| 引用本文： | 张小华,毕雪岩,高志球,刘长炜,彭文武,曾智华,杨楠,李煜斌.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*[J].热带海洋学报,2021,40(2):1-6. |
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| 作者姓名： | 张小华 毕雪岩 高志球 刘长炜 彭文武 曾智华 杨楠 李煜斌 |
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| 作者单位： | 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 2100442.中国气象局, 广州热带海洋气象研究所, 广东 广州 5106403.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 5102754.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 1000295.中国气象局, 上海台风研究所, 上海 200030 |
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| 基金项目： | 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)。 |
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| 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。
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| 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 |
| 收稿时间： | 2020-05-14 |
| 修稿时间： | 2020-07-19 |
Parameterizations of drag coefficient and aerodynamic roughness length using the turbulence data collected during typhoons Hagupit and Chanthu |
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| ZHANG Xiaohua,BI Xueyan,GAO Zhiqiu,LIU Changwei,PENG Wenwu,ZENG Zhihua,YANG Nan,LI Yubin.Parameterizations of drag coefficient and aerodynamic roughness length using the turbulence data collected during typhoons Hagupit and Chanthu[J].Journal of Tropical Oceanography,2021,40(2):1-6. |
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| Authors: | ZHANG Xiaohua BI Xueyan GAO Zhiqiu LIU Changwei PENG Wenwu ZENG Zhihua YANG Nan LI Yubin |
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| Institution: | (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) |
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| Abstract: | 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-1and critical 10m wind speed is 23.69 m·s-1. |
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| Keywords: | aerodynamic roughness length drag coefficient parameterization Typhoon Hagupit Typhoon Chanthu |
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