Application Laboratory     JAMSTEC        2022.08.16

Distribution of the JCOPE-FGO reanalysis data

By assimilating available observation data into the JCOPE-FGO ocean nowcast/forecast system covering the global ocean excluding arctic regions, Application Laboratory has created the JCOPE-FGO reanalysis data with horizontal high resolution of 1/10 deg. to describe the oceanic variability associated with the major ocean curents and mesoscale eddies from January 1993 to present (updated once in a few months) (Kido et al. 2022). The JCOPE-FGO reanalysis data are available from the authors by request.

The JCOPE-FGO reanalysis assimilates satellite alitimetry, JMA analysis sea surface temperature (MGDSST), in-situ temperature/salinity data into the model by using the three dimensional variational method. The river discharge data from JRA-55 do are incorporated in the model.

The JCOPE-FGO reanalysis data are produced with a support from Grant-in-Aid for Scientific Research on Innovative Areas Mid-latitude Ocean-Atmosphere interaction hotspots under the changing climate.


Locations of the river mouths incorporated in JCOPE-FGO. Scales of the circles indicate the mean discharge volume transport values.


Climatology of SSS around the Indian Ocean from the original JCOPE-FGO (left), the run without river forcing (middle), and differences between the two runs (right)


How to download the JCOPE-FGO reanalysis data

Application Laboratory freely distributes the JCOPE-FGO reanalysis data to any interested users. If you accept following conditions of data use, please fill out the following Google form to specify your order:
Application form (Google form)
Horizontal range: 0-360E, 75S-75N
Vertical range: 0-6500m (Since original data is written in the vertical sigma-coordinate, please specify vertical levels for your analysis)
Time range: January 1st, 1993 to 31st, December, 2022 (We can provide near realtime data upon request)
Temporal resolution: Daily or Monthly
Available variables: Sea surface height, Zonal velocity, Meridional velocity, potential temperature, salinity, and heat flux at sea surface
Data format: NetCDF or Fortran 4-byte binary
After receiving your request, we will provide a URL of ftp server for downloading your data.

Contact address:jcope at_mark jamstec.go.jp

Principal conditions of data use

  1. The user is permitted to use the data for the purpose of scientific research.
  2. The user is not allowed to copy or reproduce the data in any form for the purposes of distribution, (whether for remuneration or otherwise), sale, hire, lease or license or otherwise commercialise the data.
  3. The user is recommended to include our paper (Kido et al. 2022) in the reference of any documents describing results obtained from analyses/visualizations of the data.

Kido, S., M. Nonaka, and Y. Miyazawa, 2022: JCOPE-FGO: an eddy-resolving quasi-global ocean reanalysis product, Ocean Dynamics, 72, 599-619. html



Although every effort has been made to ensure the correctness and accuracy of the information the data, Application Laboratory makes no representations, either express or implied, as to the accuracy, currency, completeness or suitability for any particular purpose of the information and accepts no liability for any use of the data or any responsibility for any reliance placed on that information. Application Laboratory acknowledges that the data cannot be guaranteed error free and that use of the data is at the user's sole risk and that the information contained in the data may be subject to change without notice.