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*

doi:10.11978/2020047

Journal of Tropical Oceanography ›› 2021, Vol. 40 ›› Issue (2): 1-6.doi: 10.11978/2020047CSTR: 32234.14.2020047

Special Issue: 海洋大数据及应用

• Marine Meteorology • Next Articles

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

ZHANG Xiaohua¹(), BI Xueyan², GAO Zhiqiu^1,⁴(), LIU Changwei³, PENG Wenwu¹, ZENG Zhihua⁵, YANG Nan¹, LI Yubin¹

1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, School of Atmospheric physics, Nanjing University of Information Science and Technology, Nanjing 210044, China
2. Guangzhou Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou 510640, China
3. Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai 510275, China
4. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
5. Shanghai Typhoon Institute, China Meteorological Administration, Shanghai 200030, China

Received:2020-05-14 Revised:2020-07-19 Online:2021-03-10 Published:2020-08-02
Contact: GAO Zhiqiu E-mail:394803509@qq.com;zgao@mail.iap.ac.cn
About author:ZHANG Xiaohua (1987—), male, PhD student. email: 394803509@qq.com
Supported by:
National Key Research and Development Programs of Ministry of Science and Technology of China(2018YFC1506405);National Key Research and Development Programs of Ministry of Science and Technology of China(2018YFC1507404);National Natural Science Foundation of China(41275022);National Natural Science Foundation of China(4167018);National Natural Science Foundation of China(41975067);National Natural Science Foundation of China(41675019)

Abstract

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^-1 and critical 10m wind speed is 23.69 m·s^-1.

Key words: aerodynamic roughness length, drag coefficient, parameterization, Typhoon Hagupit, Typhoon Chanthu

CLC Number:

P732.31

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.

Figures/Tables 5

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

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