%0 Journal Article
%T A Comparison Study of Tropical Pacific Ocean State Estimation: Low-Resolution Assimilation vs. High-Resolution Simulation<br>A Comparison Study of Tropical Pacific Ocean State Estimation： Low-Resolution Assimilation vs. High-Resolution Simulation
%A FU Weiwei
%A ZHU Jiang
%A ZHOU Guangqing
%A WANG Huijun
%A <br>FU Weiwei
%A ZHU Jiang
%A ZHOU Guangqing
%A WANG Huijun
%J 大气科学进展
%D 2005
%I 
%X A comparison study is performed to contrast the improvements in the tropical Pacific oceanic state of a low-resolution model respectively via data assimilation and by an increase in horizontal resolution. A low resolution model (LR) (1°lat by 2°lon) and a high-resolution model (HR) (0.5°lat by 0.5°lon) are employed for the comparison. The authors perform 20-yr numerical experiments and analyze the annual mean fields of temperature and salinity. The results indicate that the low-resolution model with data assimilation behaves better than the high-resolution model in the estimation of ocean large-scale features. From 1990 to 2000, the average of HR’s RMSE (root-mean-square error) relative to independent Tropical Atmosphere Ocean project (TAO) mooring data at randomly selected points is 0.97°C compared to a RMSE of 0.56°C for LR with temperature assimilation. Moreover, the LR with data assimilation is more frugal in computation. Although there is room to improve the high-resolution model, the low-resolution model with data assimilation may be an advisable choice in achieving a more realistic large-scale state of the ocean at the limited level of information provided by the current observational system.
%K comparison study
%K high-resolution model
%K data assimilation
%K low-resolution model<br>热带太平洋地区
%K 状态评估
%K 计算机模拟
%K 低度解模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=5434AFBF6CB6E7E8D67733B541F211C7&aid=C3F637B1ABA3E9DC672AD90D76196D0C&yid=2DD7160C83D0ACED&vid=BC12EA701C895178&iid=0B39A22176CE99FB&sid=D2742EEE6F4DF8FE&eid=D5C73DEF4CF8FAF3&journal_id=0256-1530&journal_name=大气科学进展&referenced_num=0&reference_num=25