强风条件下海面拖曳系数和粗糙长度研究

张荣智; 高志球; 沈新勇

doi:10.3969/j.issn.0253-4193.2013.01.009

强风条件下海面拖曳系数和粗糙长度研究

doi: 10.3969/j.issn.0253-4193.2013.01.009

1.
南京信息工程大学气象灾害省部共建教育部重点实验室, 江苏南京 210044;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室, 北京 100029;中国民航华东地区空中交通管理局气象中心, 上海 201105
2.
中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室, 北京 100029
3.
南京信息工程大学气象灾害省部共建教育部重点实验室, 江苏南京 210044

基金项目: 公益性行业(气象)科研专项"适合东亚气候特点的模式边界层过程参数化"(GYHY201006024);国家重点基础研究发展计划(973计划)项目"南海海气相互作用与海洋环流和涡旋演变规律"(2011CB403501);中国科学院战略性先导科技专项"应对气候变化的碳收支认证及相关问题"(XDA05110104);江苏省青蓝工程(2009)。

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出版历程
- 收稿日期: 2010-04-25
- 修回日期: 2012-08-15

Drag coefficient and aerodynamic roughness at high wind

1.
Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China;State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, CAS, Beijing 100029, China;East China Regional Air Traffic Management Bureau of Civil Aviation of China, Meteorological Center, Shanghai 201105, China
2.
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, CAS, Beijing 100029, China
3.
Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China

摘要

摘要: 进一步研究强风条件下海-气湍流动量交换以及海浪特征,有助于提高数值天气模式对台风强度演变、移动路径以及恶劣海况的预报能力。依照前人的方法将台风分为风向与浪向(1)相同,(2)相反,和(3)交叉3个扇形区,并结合台风路径数据,得到了浮标数据相对于台风的方位。分别对3种类型的浮标数据进行分析,进而发现了波浪高度和相速度随风速增加而变化的规律。并利用GWW参数化方案计算出摩擦速度(u_*)、拖曳系数(C_DN)和粗糙长度(z₀)。将这些结果与前人代表性的研究论文中所用观测数据和所得研究结论进行比较,结果表明二者有较强的一致性。该研究证明GWW参数化方案在强风条件下依然有很好的适用性。
- 台风 /
- GWW方案 /
- 浪高 /
- 相速度 /
- 拖曳系数 /
- 粗糙长度
Abstract: Study of air-sea momentum exchange and wave character is becoming even more important for an accurate forecasting of cyclone evolution and atrocious ocean. Followed previous method, typhoon was divided into three sectors: (1) swell along wind, (2) swell against wind and (3) swell cross wind. Combining buoy data and hurricane paths data, the azimuth and distance of buoys relative to hurricane were obtained. By analyses theses data, the laws of wave height and phase velocity with wind speed increase were derived. And then, friction velocity(u_*), the drag coefficient(C_DN) and aerodynamic roughness length(z₀)was calculated by using the GWW parameterization scheme. Compared with anterior representative studies, we found the estimated results were consistent well with their observation and conclusions. This study proves the GWW parameterization scheme is applicable well under high wind speed regime.
- typhoon /
- GWW scheme /
- wave height /
- phase velocity /
- drag coefficient /
- aerodynamic roughness

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参考文献(29)

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