Medium Range Forecast (MRF) and Nested Grid Model (NGM)


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        citation:  (CI_Citation)
            title:  Medium Range Forecast (MRF) and Nested Grid Model (NGM)
            date:  (CI_Date)
                date:  1991-01-01
                dateType:  (CI_DateTypeCode) publication
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                code:  NCEI DSI 6140_01
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        abstract:  The Nested Grid Model (NGM) and Medium Range Forecast (MRF) Archive is historical digital data set DSI-6140, archived at the NOAA National Centers for Environmental Information (NCEI). The National Centers for Environmental Prediction (NCEP) of the National Weather Service (NWS) runs a series of computer analyses and forecasts operationally, which use or produce model data. This data set is one of several NCEP sets of model data archived at NCEI. Historical data set DSI-6140 consists of two subgroups of NCEP model data: NGM and MRF for the time period January 1, 1991 through April 15, 1997. Geographic coverage is the 48 contiguous states of the United States of America, plus adjacent waters and southern Canada. Major parameters provided by NGM are ice covered water areas (yes/no), snow covered areas (yes/no), terrain height, mean sea level pressure, convective precipitation, total precipitation, exchange coefficient at surface, upward turbulent flux of sensible heat, upward turbulent flux of water, surface pressure, number of mixed layers next to surface, u component of wind, v component of wind, vertical velocity, specific humidity, and temperature. Parameters provided by MRF are surface temperature, geopotential height, and relative humidity. DSI-6140 is the historical precursor data set to digital data set DSI-6141, NCEP EDAS and GDAS (FNL) Model Data, also archived at NCEI.
        purpose:  The analyzed data should provide a better representation of the real atmosphere than observations alone because of limitations in the observations. Some of these limitations are due to measurement error or other instrument problems, and nonuniform spatial and temporal distributions of the observations. At NOAA's Air Resources Laboratory (ARL), the NCEP model data are used for air quality transport and dispersion modeling.
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            keyword:  Earth Science > Atmosphere > Altitude > Geopotential Height
            keyword:  Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure
            keyword:  Earth Science > Atmosphere > Atmospheric Radiation > Heat Flux
            keyword:  Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature
            keyword:  Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity > Relative Humidity
            keyword:  Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Profiles
            keyword:  Earth Science > Atmosphere > Atmospheric Winds > Surface Winds
            keyword:  Earth Science > Atmosphere > Atmospheric Winds > Upper Level Winds
            keyword:  Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vertical Wind Velocity/Speed
            keyword:  Earth Science > Atmosphere > Precipitation > Precipitation Amount
            keyword:  Earth Science > Land Surface > Topography > Terrain Elevation > Digital Elevation/Terrain Model (DEM)
            keyword:  Earth Science > Terrestrial Hydrosphere > Snow/Ice > Lake Ice
            keyword:  Earth Science > Terrestrial Hydrosphere > Snow/Ice > River Ice
            keyword:  Earth Science > Climate Indicators > Cryospheric Indicators > Sea Ice Concentration
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                    date:  2018
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            otherConstraints:  Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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        language:  eng; USA
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                    description:  ground condition
                    beginPosition:  1991-01-01
                    endPosition:  1997-04-15
        supplementalInformation:  References: Gerrity, J., 1977: The LFM model - 1976: A documentation. NOAA Tech. Memo. NWS NMC 60, 68 pp. Hoke, J.E., N. A. Phillips, G.J. DiMego, J.J. Tuccillo, and J.G. Sela, 1989: The Regional Analysis and Forecast System of the National Meteorological Center, Weather and Forecasting, 4 (323-334). Kanamitsu, M., 1989: Description of the NMC Global Data Assimilation and Forecast System, Weather and Forecasting, 4(335-342). Newell, J.E. and D.G. Deaven, 1981: The LFM-II Model - 1980. NOAA Tech. Memo. NWS NMC 66, U.S. Department of Commerce, Washington, D.C., 20 pp. Petersen, R.A. and J.D. Stackpole, 1989: Overview of the NMC Production Suite, Weather and Forecasting, 4 (313-322). Rolph, G.D. and R.R. Draxler, 1990: Sensitivity of Three-Dimensional Trajectories to the Spatial and Temporal Densities of the Wind Field, Journal of Applied Meteorology, 29 (1043-1054). Sela, J.G., 1980: Spectral modeling at the National Meteorological Center, Mon. Wea. Rev., 108 (1279-1292).
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                description:  NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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