Assimilation of TOPEX/POSEIDON altimeter data with a reduced gravity model of the Japan Sea

被引：1

作者：

Hirose N. ^{[1
]}

Fukumori I. ^{[2
]}

Yoon J.-H. ^{[3
]}

机构：

[1] Interdisc. Grad. Sch. of Eng. Sci., Kyushu University

[2] Jet Propulsion Laboratory, California Institute of Technology, Pasadena

[3] Res. Institute for Applied Mechanics, Kyushu University

来源：

Journal of Oceanography | 1999年 / 55卷 / 1期

关键词：

Data assimilation; Japan Sea; Kalman filter; Reduced-gravity model; Sea level; TOPEX/POSEIDON;

D O I：

10.1023/A:1007707405711

中图分类号：

学科分类号：

摘要：

Sea level data measured by TOPEX/POSEIDON over the Japan Sea from 1993 to 1994 is analyzed by assimilation using an approximate Kalman filter with a 1.5 layer (reduced-gravity) shallow water model. The study aims to extract signals associated with the first baroclinic mode and to determine the extent of its significance. The assimilation dramatically improves the model south of the Polar Front where as much as 20 cm2 of the observed sea level variance can be accounted for. In comparison, little variability in the northern cold water region is found consistent with the model dynamics, possibly due to significant differences in stratification.

引用

页码：53 / 64

页数：11

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