非线性共轭梯度法在东海黑潮流计算中的应用
Application of nonlinear conjugate gradient method in geostrophic velocity calculation of Kuroshio in the East China Sea
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摘要: 基于现有的几种海流计算方法,根据与P矢量法相同的动力特性和内在假设,对海流计算提出了一种简单、高效、易扩展、适用范围广的新方法:非线性共轭梯度法.利用1989年4月以来的"中日黑潮合作调查研究"6个航次的CTD资料,对东海黑潮流区域应用非线性共轭梯度法进行了海流计算.通过与船载ADCP实测结果比较表明,非线性共轭梯度法是可行的.Abstract: Based on several methods of geostrophic velocity calculation, nonlinear conjugate gradient method is introduced.Sharing the same dynamical characteristics and inherent hypotheses with PV method, this approach is simple, effective, easy-expanded and wide-applicable.By using of this method, geostrophic velocity of Kuroshio in the East China Sea is studied using the CTD data of six cruises gained in the Sino-Japan joint investigation and the study on the Kuroshio since April 1989.Compared with observation data of shipbroad ADCP, the nonlinear conjugate gradient method has been proved feasible.
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