Publications des scientifiques de l'IRD

Tranchant B., Reffray G., Greiner E., Nugroho D., Koch Larrouy Ariane, Gaspar P. (2016). Evaluation of an operational ocean model configuration at 1/12 degrees spatial resolution for the Indonesian seas (NEMO2.3/INDO12) : Part 1 : Ocean physics. Geoscientific Model Development, 9 (3), p. 1037-1064. ISSN 1991-959X.

Titre du document
Evaluation of an operational ocean model configuration at 1/12 degrees spatial resolution for the Indonesian seas (NEMO2.3/INDO12) : Part 1 : Ocean physics
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000376934900007
Auteurs
Tranchant B., Reffray G., Greiner E., Nugroho D., Koch Larrouy Ariane, Gaspar P.
Source
Geoscientific Model Development, 2016, 9 (3), p. 1037-1064 ISSN 1991-959X
INDO12 is a 1/12 degrees regional version of the NEMO physical ocean model covering the whole Indonesian EEZ (Exclusive Economic Zone). It has been developed and is now running every week in the framework of the INDESO (Infrastructure Development of Space Oceanography) project implemented by the Indonesian Ministry of Marine Affairs and Fisheries. The initial hydrographic conditions as well as open-boundary conditions are derived from the operational global ocean forecasting system at 1/4 degrees operated by Mercator Ocean. Atmospheric forcing fields (3-hourly ECMWF (European Centre for Medium-Range Weather Forecast) analyses) are used to force the regional model. INDO12 is also forced by tidal currents and elevations, and by the inverse barometer effect. The turbulent mixing induced by internal tides is taken into account through a specific parameterisation. In this study we evaluate the model skill through comparisons with various data sets including outputs of the parent model, climatologies, in situ temperature and salinity measurements, and satellite data. The biogeochemical model results assessment is presented in a companion paper (Gutknecht et al., 2015). The simulated and altimeter-derived Eddy Kinetic Energy fields display similar patterns and confirm that tides are a dominant forcing in the area. The volume transport of the Indonesian throughflow (ITF) is in good agreement with the INSTANT estimates while the transport through Luzon Strait is, on average, westward but probably too weak. Compared to satellite data, surface salinity and temperature fields display marked biases in the South China Sea. Significant water mass transformation occurs along the main routes of the ITF and compares well with observations. Vertical mixing is able to modify the South and North Pacific subtropical water-salinity maximum as seen in T - S diagrams. In spite of a few weaknesses, INDO12 proves to be able to provide a very realistic simulation of the ocean circulation and water mass transformation through the Indonesian Archipelago. Work is ongoing to reduce or eliminate the remaining problems in the second INDO12 version.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Limnologie physique / Océanographie physique [032]
Description Géographique
INDONESIE ; PACIFIQUE ; OCEAN INDIEN
Localisation
Fonds IRD [F B010066958]
Identifiant IRD
fdi:010066958
Contact