Development of the next-generation operational global ocean data assimilation system in JMA

Shiro Ishizaki1, Yosuke Fujii2, Ichiro Ishikawa3, Takuma Yoshida4, Shoji Hirahara1, Yukimasa Adachi1, Yutaro Kubo1 and Takuya Komori4, (1)Japan Meteorological Agency, Tokyo, Japan, (2)Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan, (3)Meteorological Research Inst, Tsukuba, Japan, (4)Numerical Prediction Development Center, Japan Meteorological Agency, Tsukuba, Japan
Abstract:
JMA operates global ocean data assimilation system in order to monitor the ocean state especially in the equatorial region and to provide ocean initial conditions for seasonal forecasting system. This talk will show a current status of development of the next-generation global ocean data assimilation system (MOVE-G3) in JMA/MRI.

MOVE-G3 adopts a four-dimensional variational (4DVAR) scheme, rather than the current operational three-dimensional variational (3DVAR) scheme. Furthermore, a sea-ice assimilation component is newly introduced into the system. The oceanic temperature and salinity fields of the analysis model will be used for initializing the ocean part of JMA’s next generation seasonal prediction system (JMA/MRI-CPS3), which contains a higher-resolution (eddy-permitting) ocean model, using the incremental analysis update (IAU) technique. In this talk, some preliminary results of experiment using MOVE-G3 and JMA/MRI-CPS3 will be presented.

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