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CROCO VIETNAM

by ECOLA last modified Nov 29, 2019 11:54 AM

EXPERIMENTAL OCEAN FORECAST OFF VIETNAM

Collaborators: Prof. Nguyen Thong and Dr. Ho Tuan Duc (Faculty of Civil Engineering, HCMC University of Technology and CARE research center in Vietnam)

DISCLAIMER: Our main goal is to improve our regional forecasting capability through validation using any available information, either from professionals or the general public experience. The achievement of this goal involves the presentation of experimental graphical products, which are provided "as is" without warranty of any kind, including any implied warranties of merchantability or fitness for a particular purpose. 

FieldTodayTomorrowIn 2 days
Sea Surface Height D D+1 D+2

Sea Surface Temperature and Currents

D D+1 D+2

FORECAST DESCRIPTION

CROCO is a descendent of the Regional Oceanic Modeling System (ROMS-AGRIF version). It is setup here for operational regional modeling following Marchesiello et al. (2008), using the Forecast_tools as part of CROCO_tools. This is actually a downscaled forecast approach since the regional model is forced at the lateral boundaries and relaxed in the interior domain by global forecasts provided by Mercator Ocean (products available at the Copernicus Marine Environment Monitoring Service). The atmospheric Global Forecast System GFS of the National Center for Environmental Prediction (NCEP, NWS/NOAA) is used for surface forcing. Two days of simulation are run in hindcast mode. This provides balanced initial conditions for a 3-day forecast. A shell script manages data downloading, hindcast and forecast simulations as well as data analysis for this page (see flowchart).

GLOBAL OCEAN ANALYSIS/FORECAST system: the Operational Mercator system at 1/12 degree is providing 10 days of 3D global ocean forecasts updated daily. The time series start on December 27, 2006 and is aggregated in time in order to reach a two full-year time series sliding window. This product provides daily-mean fields for sea level height, temperature and currents from the top to the bottom over the global ocean. The global ocean output files are given with a 1/12 degree horizontal resolution with regular longitude/latitude equirectangular projection. 50 vertical levels are ranging from 0 to 5500 meters.

GLOBAL FORECAST SYSTEM: NOAA is running the atmospheric GFS system four times per day (00 UTC, 06 UTC, 12 UTC, and 18 UTC) out to 16 days. For the first week, computation is done at a resolution of about 28-km. The GFS data is then gridded for users on a global 0.5-degree or even 0.25 degree resolution grid. 


REFERENCES

  • Marchesiello P., et al, 2008: Keys to affordable regional marine forecast systems. Mercator Ocean Quarterly Newsletter, 30, 38-48, July 2008.
  • Sepulveda H.H., P. Marchesiello and Z. Li, 2013: Oceanic data assimilation study in northern Chile: use of a 3DVAR method. Lat. Am. J. Aquat. Res., 41(3), 570-575.

 

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