波-流相互作用源函数及其对海浪模拟的影响  

Wave-Current Interaction Source Function and Its Effects on the Wave Numerical Simulation

作　　者：王泽宇 江兴杰 华锋 杨永增 WANG Zeyu;JIANG Xingjie;HUA Feng;YANG Yongzeng(First Institute of Oceanography,MNR,Qingdao 266061,China;Key Laboratory of Marine Science and Numerical Modeling,MNR,Qingdao 266061,China;Shandong Key Laboratory of Marine Science and Numerical Modeling,Qingdao 266061,China;Laboratory for Regional Oceanography and Numerical Modeling,Pilot National Laboratory for Marine Science and Technology,Qingdao 266237,China;College of Science,Shantou University,Shantou 515063,China)

机构地区：[1]自然资源部第一海洋研究所,山东青岛266061 [2]自然资源部海洋环境科学与数值模拟重点实验室,山东青岛266061 [3]山东省海洋环境科学与数值模拟重点实验室,山东青岛266061 [4]青岛海洋科学与技术试点国家实验室区域海洋动力学与数值模拟功能实验室,山东青岛266237 [5]汕头大学理学院,广东汕头515063

出　　处：《海洋科学进展》2023年第3期420-434,共15页Advances in Marine Science

基　　金：国家重点研发计划资助项目(2017YFC1404201);自然资源部全球变化与海气相互作用专项(二期)资助项目。

摘　　要：当前,基于第三代海浪模式的波-流相互作用研究,通常仅考虑背景流场对海浪群速度大小、方向的改变及其所引起的波浪折射效应,忽略了流场对波浪能谱的影响。本文以波-流相互作用源函数为切入点,利用MASNUM海浪模式进行理想实验,阐释了水平方向上的波-流相互作用对海浪能谱的改变以及对海浪模拟可能造成的影响。结果表明:水平流速梯度量级、水深、波浪成长状态以及流速梯度方向均可以影响波-流相互作用源函数的作用效果,使得有效波高、谱峰波向的模拟结果发生变化。在更符合实际的水平流速梯度量级下,波-流相互作用源函数对有效波高和谱峰波向模拟值的影响非常小;但考虑到涌浪的长距离传播,其对谱峰波向的影响仍可能明显改变涌浪的传播形态。Previous studies on the wave-current interactions in the third generation wave models only focus on the current-induced changes in propagation velocity and direction of wave groups and the associated wave refractions,but ignoring the changes in wave energy spectra.In our study,numerical experiments are conducted based on the MASNUM-WAM(Key Laboratory of Marine Science and Numerical Modelling Wave Model),in which the wave-current interaction function is adopted,and the effects of horizontal wave-current interaction on numerical simulation of both wave spectra and wave parameters are elucidated.It is concluded that the outputs of the wave-current interaction source function can be influenced by various factors,such as the magnitude and direction of the horizontal field gradient of ocean currents,water depth,and development status of wind waves,causing differences arising from both the simulated significant wave heights and spectrum peak directions.In fact,those differences can be very small in real-world current fields,with consideration of long-distance propagation,however,the wave-current effects on spectrum peak directions may significantly change the propagation patterns of swells.

关 键 词：波-流相互作用源函数 流速梯度 海浪数值模拟 MASNUM海浪模式 

分 类 号：P731.22[天文地球—海洋科学]