Japanese

Past Topics
08.10.31

The JCOPE activity was introduced by a GODAE white paper [PDF,0.8MB].

08.10.06

Use of the zoom-up function for visualized images needs password authentication. If you are interested in use of the zoom up function, please contact JCOPE group. (jcope 'atmark' jamstec.go.jp)

08.05.14

The JCOPE2 forecast system has been updated to a new version. Following modifications have been made: 1. Coastal and bottom topography was updated using various kinds of data sources (JTOPO30, Uehara(2002), and GEBCO). 2. The range of the 1/12 degree resolution model was extended to include northern part of the South China Sea. 3. The total sigma levels was increased to 47 from 45. 4. The scheme of baroclinic pressure gradient was changed to the 4th order scheme (McCalpin, 1994) from the 2nd order (Mellor and Blumberg, 1987).

07.09.19

The JCOPE2 forecast system has been updated to a new version with the OGCM forced by realtime wind/surface heat flux calculated from products of the NCEP Global Forecast System. The 3D-VAR system has been further updated to a tuned version.

07.07.30

The JCOPE2 forecast system has been updated to a new version, which includes a FCT tracer advection scheme, biharmonic viscosity/diffusion scheme, an updated 3D-VAR system with tuned parameters, and the Changjiang discharge in the East China Sea.

06.11.27

The forecast system has been updated to a new version, JCOPE2, using a 3-Dimenional Variational (3D-VAR) method.

05.02.13

The prescribed model forecast error in the Kuroshio region has been changed.

05.08.08

The reanalysis data has been recaluculated from 25 Jan. 2005 using revised QuikSCAT NRT data. In addition, the surface forcing used in the forecast phase has been improved.

05.06.30

The JCOPE ocean forecast system -Toward engineering appliactions- [PDF,1.0Mbytes] (in Japanese)

05.04.01

Validation of the JCOPE system products in the Kuroshio region [PDF,33Mbytes] (in Japanese)

05.04.01

The Kuroshio large-meander formation in 2004 analyzed by the JCOPE ocean forecast system [PDF,0.6Mbytes] (in Japanese)

05.03.24

Current and future perspective of the JCOPE ocean forecast system [PDF,1.0Mbytes] (in Japanese)

05.03.24

The JCOPE ocean forecast system [PDF,0.45Mbytes] (in Japanese)

04.12.02

Heat flux calculation algorithm has been modified to restrain low temperature (less than -1.5 deg.C).

04.09.30

Japan Coastal Ocean Predictability Experiment -Kuroshio Path Forecast (2002-2004)- [PDF,0.7Mbytes] (in Japanese)

04.09.22

We have added a new menu of hindcasts archive

04.05.17

Will the Kuroshio Large-Meander be generated ? (in Japanese)

04.05.10

Position of the model Hachijojima has been modified and prescribed model and data error variances have been changed.

04.03.22

The prescribed model forecast error in the Kuroshio region has been changed.

04.03.09

The prescribed model forecast error in the Kuroshio region has been changed.

04.02.20

Two new maps have been added to the Analysis/Forecast page for monitoring the surface Kuroshio path near the Izu Island and the Oyashio intrusion off Tohoku.

04.02.02

The description of the system has been considerably updated.

04.01.26

The ocean model (POM) has been replaced with POMgcs (Mellor et al., 2002)

04.01.21

Frontier Newsletter, No.24

03.11.12

The JCOPE ocean forecast system [PDF,0.5Mbytes, 03.11.12] submitted to First ARGO Science Workshop.

03.09.02

The system has improved to estimate the model forecast errors in an adaptive manner (Fox et al., 2000). The description of the system was also modified.

03.08.19

The system has been updated with the following improvements
1) We have changed the topography of the high-resolution model; the new topography is less smoothed than old one. We also have changed the wind forcing for spin-up from the NCEP/NCAR reanalysis to the QuikSCAT scatterometer wind. As a result, the separataion of the Kuroshio from the Boso Peninsula is simulated better than the old version ( Change of topography and wind forcing [0.1Mbytes]).
2) Sea surface height anomaly data from the Geosat Follow On has been included in the assimilation instead of the ERS-2 data.
3) The lateral boundary conditions from the low-resolution model are continuously calculated during the forecast phase.

03.06.19

The system improved to assimilate in-situ temperature and salinity profiles (0-400m) in addition to the assimilation of the satellite data (sea surface height anomaly and sea surface temperature). Moreover, the QuikSCAT wind data and Inremental Analysis Updates (IAU) are introduced into the operation. The description of the system was also modified.

03.06.19

Change of wind forcing from the NCEP/NCAR data to the QuikSCAT [0.1Mbytes]

03.05.06

A sign of formation of the Kuroshio large meander ? (in Japanese)

03.04.08

The description of the system was updated to include examples of comparison between the assimilated result and the products provided by the operational agency or the research institute.

03.03.27

The description of the system was updated to include examples of comparison between the assimilated result and the in-situ observation.

03.03.24

The system improved to assimilate both sea surface temperature and temperature at the depth of 200m in addition to the assimilation of sea surface height anomaly. The description of the system was also modified.

03.01.29

A forecast system of Japan Coastal Ocean (in Japanese) [PDF,4.8Mbytes, 03.01.29] submitted to the report of the 8th Summer School on Data Assimilation in Oceanography

02.10.15

The Jason-1 and ERS-2 data provided by the NRL/SSC are assimilated into the model instead of the TOPEX/POSEIDON and ERS-2 data provided by the CCAR. The new data are assimilated into the model from July 9, 2002.

02.08.30

The TOPEX/POSEIDON sea surface height data has not been included in the initialization on and after 02.08.30 because of the orbit transfer of the TOPEX/POSEIDON satellite. Now the ERS-2 data is only assimilated.

02.09.20

Japan Coastal Ocean Predictability Experiment -Real time forecast system- [PDF,2.0Mbytes, 02.09.20]
submitted to a special session "ocean forecasting" in TECHNO-OCEAN 2002

02.08.20

The surface forcings (wind stress, heat flux) used for the forecast run is changed to the interpolation of monthly climatology from the constant forcing of the initialization time, because local intensification of the surface fluxes due to the Typhoon distorts the forecast. (ex., the forecast initialized on 02.08.10) This change is applied to the forecast initialized on and after 02.08.20.

02.07.17

Statistics of observed upper ocean variability [1.5Mbytes, 02.07.17]