A global 4-dimensional ocean data assimilation system and the studies on its results in the tropic Pacific

LIU Yi-min; LI Wei-jing; ZHANG Pei-qun

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LIU Yi-min, LI Wei-jing, ZHANG Pei-qun. A global 4-dimensional ocean data assimilation system and the studies on its results in the tropic Pacific[J]. Haiyang Xuebao, 2005, 27(1): 27-35.

Citation:

LIU Yi-min, LI Wei-jing, ZHANG Pei-qun. A global 4-dimensional ocean data assimilation system and the studies on its results in the tropic Pacific[J]. Haiyang Xuebao, 2005, 27(1): 27-35.

LIU Yi-min, LI Wei-jing, ZHANG Pei-qun. A global 4-dimensional ocean data assimilation system and the studies on its results in the tropic Pacific[J]. Haiyang Xuebao, 2005, 27(1): 27-35.

Citation:

LIU Yi-min, LI Wei-jing, ZHANG Pei-qun. A global 4-dimensional ocean data assimilation system and the studies on its results in the tropic Pacific[J]. Haiyang Xuebao, 2005, 27(1): 27-35.

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A global 4-dimensional ocean data assimilation system and the studies on its results in the tropic Pacific

National Climate Center of China, Beijing 100081, China

Received Date: 2003-12-15
Rev Recd Date: 2004-08-20

Abstract

Abstract

We introduce a global 4-dim ensional ocean data assmiilation system,as one part of operational dynamic model system of National Climate Center,which is routinely serving the marine initial fields for operational dynamic model system.Th is system mainly contains 4 parts such as pretreating data,variation interpo lating and ocean dynamic model and post-treating.Pretreating data inc ludes collect ing data,decoding data and data quality control.A3-dmi ensional variation method is used in our system on the spatial.Meanwhile,a time-window,about 4-weeks,is opened in order to obtain asmore observation information as possible.L30T63OGCM Version 1.0,which is established and developed by LASG,is selected as the dynamic model of our system.Using the observation data from 1981 to 2003,we have performed a series of numerical expermients on this system.It is illustrated that the results of this system in the region of the middle Pacific,for instances SST,SSTA,Nino index,sub-surface temperature,etc.,are coincided with corresponding results of NCEP's very well.Therefore,this system's results can be used as the initial fields of relevant ocean dynamic model system as well as a kind of reanaly zed data sets.
- ocean data assmiilation,
- data pretreating,
- dynamical ocean model,
- 3-dmiensional variation,
- tmie-window,
- SST

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