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NCEP FNL Operational Model Global Tropospheric Analyses, July 1976 to April 1997

| DOI: 10.5065/D6K07288

The Final (FNL) global tropospheric analyses archived here were produced by NCEP's Global Forecast System (GFS), which was run operationally at 12-hour intervals to make multiple-day weather forecasts, from July 1976 through mid-April 1997. FNLs are analyses that are produced after the model has completed the forecast cycle, and they include the most complete set of observations available for a given cycle. The FNL from a given cycle, which is the best available analysis, is then used in the initialization of the next cycle.

FNL Data are available on pairs of 2.5-degree hemispheric grids (North and South) at the Earth's surface, twelve vertical levels from 1000 millibars up to 50 millibars, the tropopause, boundary and some sigma layers, and a few other levels. Parameters include surface pressure, sea level pressure, geopotential height, temperature, sea surface temperature, potential temperature, relative humidity, snow depth (weekly, Northern Hemisphere only) precipitable water, u- and v- winds, and vertical motion.

Temporal Range:
1976-07-01 00:00 +0000 to 1997-03-31 12:00 +0000
Air Temperature Boundary Layer Winds Geopotential Height Humidity
Hydrostatic Pressure Potential Temperature Potential Temperature Sea Level Pressure
Sea Surface Temperature Skin Temperature Snow Depth Surface Pressure
Total Precipitable Water Upper Air Temperature Upper Level Winds Vertical Wind Velocity/Speed
GRIB parameter table: HTML | XML
Vertical Levels:
See the detailed metadata for level information.
Data Types:
Spatial Coverage:
Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N Detailed coverage information
Data Contributors:
National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Related Resources:
Randel, W.J., 1992: Global atmospheric circulation statistics, 1000 - 1 mb. TN-366+STR, National Center for Atmospheric Research, 256 pp.

Parrish, D.F., and Derber, J.C., 1992: The National Meteorological Center's Spectral Statistical-Interpolation Analysis System Mon. Wea. Rev., 120, 1747-1763.

Baker, Waymon, ed, 1992: Research Highlights of the NMC Development Division: 1989-1991. NOAA, 469 pp.

Kanamitsu, M., 1989: Description of the NMC Global Data Assimilation and Forecast System Wea. and Forecasting, 4(3), 335-342.

Trenberth, K.E., and J.G. Olson, 1988: Evaluation of NMC Global Analyses: 1979-1987. TN-299+STR, National Center for Atmospheric Research, 82 pp.

Jenne, Roy L., 1986: NMC Analyses (unpublished). NCAR, 14 pp.

Cressman, G.P., 1959: An Operational Objective Analysis System Mon. Weather Rev., 87, 367-374.

Total Volume:
17.67 GB
Data Formats:
Related RDA Datasets:
NCEP FNL Operational Model Global Tropospheric Analyses, April 1997 through June 2007
NMC Global Elevation Data, 2.5-Degree and Spectral
More Details:
View a more detailed summary of the data, including specific date ranges and locations by parameter
Metadata Record:
Data License:
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