Incremental 4D-VAR assimilation scheme based on Lorenz model

作     者：WANG Xidong XU Dongfeng XU Xiaohua 

作者机构：State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administra-tion Hangzhou 310012China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administra-tion Hangzhou 310012China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of Oceanography State Oceanic Administra-tion Hangzhou 310012China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2008年第27卷第z1期

页      面：93-100页

核心收录：

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 

基　　金：the National Basic Research Program of China under Natural contract Nos 2007CB816001 and 2006CB400603 Natinal Natural Science Foundation of China under contract Nos 40346027 and 40676008 the China"908"-Project under Grant No.908-02-01-03 and 908-IC-I-13 

主　　题：4D-VAR assimilation,incremental 4D-VAR assimilation Lorenz model 

摘      要：Four-dimensional variational(4D-VAR) data assimilation method is a perfect data assimilation solution in theory, but the computational issue is quite difficult in operational *** incremental 4D-VAR assimilation scheme is set up in order to reduce the computational cost. It is shown that the accuracy of the observations, the length of the assimilation window and the choice of the first guess have an important influence on the assimilation outcome through the contrast experiment. Compared with the standard 4D-VAR assimilation scheme, the incremental 4D-VAR assimilation scheme shows its advantage in the computation speed through an assimilation experiment.