Inversion of two-dimensional tidal open boundary conditions of M_2 constituent in the Bohai and Yellow Seas  

作　　者：曹安州 郭筝 吕咸青 

机构地区：[1]Laboratory of Physical Oceanography,Ocean University of China [2]National Marine Data and Information Service

出　　处：《Chinese Journal of Oceanology and Limnology》2012年第5期868-875,共8页中国海洋湖沼学报（英文版）

基　　金：Supported by the State Ministry of Science and Technology of China (Nos.2007AA09Z118,2008AA09A402);the National Natural Science Foundation of China(No.41076006);the Ministry of Education's 111 Project(No.B07036)

摘　　要：Two-dimensional tidal open boundary conditions of the M2 constituent in the Bohai and Yellow Seas(BYS) have been estimated by assimilating T/P altimeter data.During inversion,independent point(IP) strategy was used,in which several IPs on the open boundary is assumed,values at these IPs can be optimized with an adjoint method,and those at other grid points are determined by linearly interpolating the values at IPs.The reasonability and feasibility of the model are tested by ideal twin experiments.In the practical experiment(PE) after assimilation,the cost function may reach 1% or less of its initial value.Mean absolute errors in amplitude and phase can be less than 5 cm and 5°,respectively,and the obtained co-chart can show the character of the M2 constituent in the BYS.The results of the PE indicate that using only two IPs on the open boundary can yield better simulated results.Two-dimensional tidal open boundary conditions of the M2 constituent in the Bohai and Yellow Seas （BYS） have been estimated by assimilating T/P altimeter data. During inversion, independent point （IP） strategy was used, in which several IPs on the open boundary is assumed, values at these IPs can be optimized with an adjoint method, and those at other grid points are determined by linearly interpolating the values at IPs. The reasonability and feasibility of the model are tested by ideal twin experiments. In the practical experiment （PE） after assimilation, the cost function may reach 1% or less of its initial value. Mean absolute errors in amplitude and phase can be less than 5 cm and 5°, respectively, and the obtained co-chart can show the character of the M2 constituent in the BYS. The results of the PE indicate that using only two IPs on the open boundary can yield better simulated results.

关 键 词：TWO-DIMENSIONAL adjoint method T/P altimeter open boundary conditions independent points 

分 类 号：P731.2[天文地球—海洋科学] P731.15