Collaborating with SPC on Kiritimati project

Two 10-years models hindcast at 150 m and 1km resolution

In a partnership with The Pacific Community (SPC), SIROCCO has develloped two level simulation at 1km and 150m resolution to produce Hindcast over 10 years (2010-2019) for the oceanic circulation arround Kiritimati island (Republic of Kiribati).

The first stage at 1km is forced at the ocean open boundaries with the Mercator global ocean analysis ( and atmospherci forcing are provided by the ECMWF ERA5 reanalysis (

Then the second stage at 150m is using the SYMPHONIE model at 1 km resolution as openboundary condition, ECMWF ERA5 and the Tidal componant are rovided by the FES2014 global ocean tide atlas (

The Pacific Community has made the simulation results available on a web page for both resolution :

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The next user’s meeting and training course

The next training course will take place at the Observatoire Midi-Pyrénées, Toulouse, from the 20th to 23rd March 2023. Program and registration

Recent Publication: Variability of the Red River Plume in the Gulf of Tonkin as Revealed by Numerical Modeling and Clustering Analysis

Vietnamese and French researchers from LEGOS, LOG and VAST investigated the daily to interannual variability of the Red River plume in the Gulf of Tonkin using 6-year (2011-2016) high-resolution numerical simulations. Their results show that the temporal evolution of the plume surface coverage is correlated with runoff (with a lag), but that runoff alone cannot […]

Recent publication : Influence of winds, geostrophy and typhoons on the seasonal variability of the circulation in the Gulf of Tonkin: A high-resolution 3D regional modeling study

Violaine Piton, Marine Herrmann, Patrick Marsaleix, Thomas Duhaut, Trin Bich Ngoc, Manh Cuong Tran, Kipp Shearman, Sylvain Ouillon; Regional Studies in Marine Science 45(6):101849 ; DOI:10.1016/j.rsma.2021.101849 The present study explores the seasonal variability of the circulation in the Gulf of Tonkin (GoT) and associated water fluxes, and identifies the driving physical processes of this circulation. […]