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NCOM Intra Americas Sea Nowcast Forecast System

The Naval Research Laboratory (NRL) Intra-American Seas Nowcast Forecast System (IASNFS) provides experimental near-real-time predictions of Gulf of Mexico and Caribbean waters. The IASNFS consists of a 1/24 degree (~6 km), 41-level sigma-z developmental data-assimilating ocean prediction system based on NRL's Navy Coastal Model (NCOM). The model topography is from NRL DBDB2. For daily nowcast/forecast the model is restarted from previous nowcast. Once the model restarts it continuously assimilates the synthetic temperature/salinity profiles generated by an NRL data analysis Modular Ocean Data Assimilation System (MODAS) to produce the nowcast. Real-time data come from satellite altimeter (GFO, Jason-1, ERS-2) global sea surface height anomaly and AVHRR global sea surface temperature. Three hourly surface heat fluxes, including solar radiation, wind stresses and sea level air pressure from the Navy Operational Global Atmospheric Prediction System (NOGAPS) are applied for surface forcing. View the Navy Research Laboratory's IASNFS site for additional background, images and animations. Data available here is for a Gulf-centric subset of the full IASNFS domain seen on the NRL site. Data available here is for a Gulf-centric subset of the full IASNFS domain seen on the NRL site.

View archived pictures and movies here.

Currents (meters/sec)

Forcasts at 00Z 06Z 12Z 18Z

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Salinity

Forecasts at 00Z 06Z 12Z 18Z

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Sea Surface Height (meters)

Forcasts at 00Z 06Z 12Z 18Z

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Sea Surface Temperature (degC)

Forecasts at 00Z 06Z 12Z 18Z

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Mixed Layer Depth (meters)

Forcasts at 00Z 06Z 12Z 18Z

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Maximum Density Gradient (kg/m^3/m)

Forecasts at 00 06 12 18

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Sea Surface Height Movie

Instructions

  • Naval Research Laboratory's NCOM data contains physical oceanographic data on currents, salinity, sea surface height, mixed layer depth, maximum density gradient and temperature for the Gulf of Mexico and Caribbean at a higher resolution.Opening the browse data will allow you to view information through the year directory. Now chose the month directory and then the day of which you would like to receive dataset information. Chose a date and then chose information for CSST (Sea Surface Temperature ), MDG (Maximum Density Gradient ), MID (Mix Layer Depth ), S3D (Salinity in three dimensional ), SSH (Sea Surface Height ), T3D (Temperature in three dimensional ), U3D (Eastward (+) / Westward (-) Velocity in three dimensions ), V3d (North (+) / South (-) Velocity in three dimensions ). Click the File information and a URL prefix will be available. There is also an 'OPeNDAP Direct' link. (Tip: This link is not for use in a web browser.) To use it, right-click on it and select the "copy link location" or "copy shortcut" option on the pop-up menu, then paste the result into your OPeNDAP client's URL input.
  • Listed on the information web page you can access a data access form page by selecting "OPeNDAP data access form" to obtain ASCII and Binary data object codes. Also Global Attributes and Variables are available.
  • A standard description of the data types and structures can be found by clicking the "OPeNDAP data description" link.
  • By clicking the "OPeNDAP attribute data" link, all the attribute data for the file as well as all of its content variables are available.
  • A brief summary is given on the information web page but this is not full discrete information.