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

Naoki Hirose, Ichiro Fukumori, Jong Hwan Yoon

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)53-64
Number of pages12
JournalJournal of Oceanography
Volume55
Issue number1
DOIs
Publication statusPublished - Feb 1 1999

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altimeter
gravity
sea level
baroclinic mode
polar front
Kalman filter
cold water
stratification
shallow water
sea
assimilation

All Science Journal Classification (ASJC) codes

  • Oceanography

Cite this

Assimilation of TOPEX/POSEIDON altimeter data with a reduced gravity model of the Japan Sea. / Hirose, Naoki; Fukumori, Ichiro; Yoon, Jong Hwan.

In: Journal of Oceanography, Vol. 55, No. 1, 01.02.1999, p. 53-64.

Research output: Contribution to journalArticle

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