基于风浪平衡域理论的浅水情形拖曳系数研究  

Study of Drag Coefficient over Shallow Water Based on Wind Wave Equilibrium Range

作　　者：李墨馨 赵栋梁 Li Moxin;Zhao Dongliang(College of Oceanic and Atmospheric Science,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中国海洋大学海洋与大气学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2023年第12期1-8,共8页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(41876010)资助

摘　　要：拖曳系数是计算海面风应力的重要参量,合理可靠的拖曳系数对于提高海洋与大气模式的预报能力极为重要。本文使用沿岸海域浅水情形下长时间大范围的浮标观测数据,基于风浪平衡域理论反推拖曳系数,围绕水深对拖曳系数的影响进行探究。数据结果表明,海浪的谱峰周期与拖曳系数之间有着紧密关联,水深不是影响拖曳系数的直接因素,海浪的谱宽度应是拖曳系数的直接影响因素。本文的研究结果对于合理地解释参数化拖曳系数具有重要的引导意义。Drag coefficient is a key parameter for calculating sea surface wind stress.Reasonable and reliable drag coefficient is important to improve the prediction ability of ocean and atmosphere models.Based on the theory of wind wave equilibrium range,this paper deduces the drag coefficient by using long-time and large-scale buoy observation data over shallow water,and explores the influence of water depth on the drag coefficient.The results show that water depth is not the direct factor on the drag coefficient,meanwhile the spectral width of wave is supposed to be a direct factor.Besides,there is a close correlation between the wave peak period and the drag coefficient.The results of this paper give an important guide for reasonably parameterizing the drag coefficient.

关 键 词：水深 拖曳系数 谱峰周期 谱宽度 平衡域 

分 类 号：P731.22[天文地球—海洋科学]