海洋预报2017，Vol.34Issue(5)：16-26,11.DOI:10.11737/j.issn.1003-0239.2017.05.002
赤道海洋Kelvin波对外强迫风场的响应
Response of equatorial ocean Kelvin wave to external forcing wind
摘要
Abstract
Based on the unbounded ideal ocean linear perturbation model,we achieved the analytical solution of anomalous forced Kelvin wave in the equatorial ocean,which was the response of the equatorial ocean Kelvin wave to the anomalies of the forcing zonal wind.The main results were as follows:the frequency,wave-length,and wave celerity of this forced Kelvin wave were the same as the extemal forcing wind field.The amplitude of zonal flow peaked at the equator and decayed along the meridionality.When the wind field was stronger,the forced Kelvin wave was also stronger.If the frequency and coverage of the wind field were determined,the forced Kelvin wave was limited to a certain average depth.The higher the frequency of the wind field,the longer the zonal wavelength,the smaller the meridional attenuation,then the greater the depth of the water.When the parameter was chosen,the phase of the anomalous wind field and the flow field about the anomalous forced Kelvin wave was almost the same.The forcing of the west wind would cause eastward flow,and vice versa.The phase of the flow field about forced Kelvin wave and the potential field was completely the same.The eastward flow was corresponding to the positive potential,and vice versa,which was the configuration of the classic Kelvin wave.The difference of this Kelvin wave and the classic Kelvin wave was:the former was the dispersive forced fluctuation,which was limited to a certain depth;while the latter was the non-dispersive free fluctuation,whose wavelength,oscillation frequency and the depth of the water were independently set.The analytical solution of the forced Kelvin wave was consistent with the actual and diagnostic analysis of the tropical Indian Ocean and the Pacific Ocean.The forced Kelvin wave should do exist in the actual equatorial ocean.关键词
热带大洋/Kelvin波/强迫风场/响应/解析解Key words
tropical ocean/Kelvin wave/forcing wind/response/analytical solution分类
海洋科学引用本文复制引用
陈光泽,卢姁,张铭..赤道海洋Kelvin波对外强迫风场的响应[J].海洋预报,2017,34(5):16-26,11.基金项目
国家重点基础研究“973”计划(2013CB956203). （2013CB956203）
