The North America Regional Reanalysis (NARR) Project is a reanalysis of historical observations using a 32-km version of the National Centers for Environmental Prediction (NCEP) 1993 operational ETA model and ETA data assimilation system (EDAS). The objective is to create a long-term set of consistent climate data on a regional scale for the North American domain. The domain of analyses includes North and Central America as well as small parts of the United Kingdom, Eastern Asia, South America, and areas of the Pacific and Atlantic Oceans. The period of the reanalyses is from October 1978 to the present and analyses were made 8 times daily (3 hour intervals). Horizontal boundary conditions are derived from the NCEP/DOE Global Reanalysis. Advantages over the widely used NCEP/NCAR Reanalysis (180 km) are its higher spatial and temporal resolutions (32 km grid, 45 vertical layers, every three hours) and better treatment of the land surface. This is achieved through the use of a better land-surface model (Noah LSM), the assimilation of more observational data (precipitation, upper air and surface winds), and through a better representation of the terrain (heights, vegetation, soil type). This data set contains "conventional" atmospheric analyses as well as model-derived fields that contain estimates of subsurface, surface, and radiative properties. This data set is encoded in WMO GRIB format version 1 using the NCEP GRIB table 131. The model used a native, "E-grid" for its calculations, however data were interpolated to a Lambert Conformal Conic projection, also known as NAM 221 AWIPS Grid - High Resolution North American Master Grid (32-km Resolution). All vector components are earth relative rather than grids relative which is the convention for operational NCEP model. The list of fields produced by the NARR ETA model differ from the operational ETA model. NARR data files that are compatible with the Grid Analysis and Display System (GrADS) are available.
About this Dataset
| Title | NCEP North American Regional Reanalysis (NARR), for 1979 to Present |
|---|---|
| Description | The North America Regional Reanalysis (NARR) Project is a reanalysis of historical observations using a 32-km version of the National Centers for Environmental Prediction (NCEP) 1993 operational ETA model and ETA data assimilation system (EDAS). The objective is to create a long-term set of consistent climate data on a regional scale for the North American domain. The domain of analyses includes North and Central America as well as small parts of the United Kingdom, Eastern Asia, South America, and areas of the Pacific and Atlantic Oceans. The period of the reanalyses is from October 1978 to the present and analyses were made 8 times daily (3 hour intervals). Horizontal boundary conditions are derived from the NCEP/DOE Global Reanalysis. Advantages over the widely used NCEP/NCAR Reanalysis (180 km) are its higher spatial and temporal resolutions (32 km grid, 45 vertical layers, every three hours) and better treatment of the land surface. This is achieved through the use of a better land-surface model (Noah LSM), the assimilation of more observational data (precipitation, upper air and surface winds), and through a better representation of the terrain (heights, vegetation, soil type). This data set contains "conventional" atmospheric analyses as well as model-derived fields that contain estimates of subsurface, surface, and radiative properties. This data set is encoded in WMO GRIB format version 1 using the NCEP GRIB table 131. The model used a native, "E-grid" for its calculations, however data were interpolated to a Lambert Conformal Conic projection, also known as NAM 221 AWIPS Grid - High Resolution North American Master Grid (32-km Resolution). All vector components are earth relative rather than grids relative which is the convention for operational NCEP model. The list of fields produced by the NARR ETA model differ from the operational ETA model. NARR data files that are compatible with the Grid Analysis and Display System (GrADS) are available. |
| Modified | 2025-11-20T02:53:36.016Z |
| Publisher Name | N/A |
| Contact | N/A |
| Keywords | Earth Science > Atmosphere > Air Quality > Visibility , Earth Science > Atmosphere > Altitude > Geopotential Height , Earth Science > Atmosphere > Altitude > Barometric Altitude , Earth Science > Atmosphere > Altitude > Tropopause , Earth Science > Atmosphere > Altitude > Planetary Boundary Layer Height , Earth Science > Atmosphere > Atmospheric Phenomena , Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements , Earth Science > Atmosphere > Atmospheric Pressure > Planetary Boundary Layer Height , Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure , Earth Science > Atmosphere > Atmospheric Pressure > Surface Pressure , Earth Science > Atmosphere > Atmospheric Radiation > Albedo , Earth Science > Atmosphere > Atmospheric Radiation > Atmospheric Emitted Radiation , Earth Science > Atmosphere > Atmospheric Radiation > Heat Flux , Earth Science > Atmosphere > Atmospheric Radiation > Incoming Solar Radiation , Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation , Earth Science > Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation , Earth Science > Atmosphere > Atmospheric Radiation > Radiative Flux , Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation , Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature , Earth Science > Atmosphere > Atmospheric Temperature > Dew Point Temperature , Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Potential Temperature , Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature , Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Condensation , Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Dew Point Temperature , Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Evaporation , Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Evapotranspiration , Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity , Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Total Precipitable Water , Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor , Earth Science > Atmosphere > Atmospheric Winds > Surface Winds , Earth Science > Atmosphere > Atmospheric Winds > Upper Level Winds , Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vertical Wind Velocity/Speed , Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Wind Shear , Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Frequency , Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Base Height , Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Height , Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Liquid Water/Ice , Earth Science > Atmosphere > Clouds > Cloud Precipitable Water , Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Pressure , Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Temperature , Earth Science > Atmosphere > Clouds > Cloud Types , Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Vertical Distribution , Earth Science > Atmosphere > Precipitation > Liquid Precipitation > Rain > Freezing Rain , Earth Science > Atmosphere > Precipitation > Precipitation Amount , Earth Science > Atmosphere > Precipitation > Precipitation Rate , Earth Science > Atmosphere > Precipitation > Liquid Precipitation > Rain , Earth Science > Atmosphere > Precipitation > Solid Precipitation > Ice Pellets > Sleet , Earth Science > Atmosphere > Precipitation > Solid Precipitation > Snow , Earth Science > Cryosphere > Snow/Ice > Snow Cover , Earth Science > Cryosphere > Snow/Ice > Snow Depth , Earth Science > Cryosphere > Snow/Ice > Snow Melt , Earth Science > Terrestrial Hydrosphere > Surface Water > Surface Water Processes/Measurements > Runoff , Earth Science > Land Surface > Surface Thermal Properties > Land Surface Temperature , Earth Science > Land Surface > Soils > Soil Moisture/Water Content , Earth Science > Land Surface > Soils > Soil Temperature , Earth Science > Land Surface > Surface Radiative Properties > Albedo , Earth Science > Land Surface > Topography > Terrain Elevation > Digital Elevation/Terrain Model (DEM) , Continent > North America , Continent > North America > Canada , Continent > North America > Central America , Continent > North America > Greenland , Continent > North America > Mexico , Continent > North America > United States Of America , Vertical Location > Land Surface , Vertical Location > Sea Surface , Vertical Location > Boundary Layer , Vertical Location > Troposphere , Vertical Location > Stratosphere , DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce , DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce , climatologyMeteorologyAtmosphere |
{
"identifier": "gov.noaa.ncdc:C00618",
"accessLevel": "public",
"contactPoint": {
"@type": "vcard:Contact",
"fn": "Your contact point",
"hasEmail": "mailto:[email protected]"
},
"programCode": [
"010:000"
],
"landingPage": "",
"title": "NCEP North American Regional Reanalysis (NARR), for 1979 to Present",
"description": "The North America Regional Reanalysis (NARR) Project is a reanalysis of historical observations using a 32-km version of the National Centers for Environmental Prediction (NCEP) 1993 operational ETA model and ETA data assimilation system (EDAS). The objective is to create a long-term set of consistent climate data on a regional scale for the North American domain. The domain of analyses includes North and Central America as well as small parts of the United Kingdom, Eastern Asia, South America, and areas of the Pacific and Atlantic Oceans. The period of the reanalyses is from October 1978 to the present and analyses were made 8 times daily (3 hour intervals). Horizontal boundary conditions are derived from the NCEP\/DOE Global Reanalysis. Advantages over the widely used NCEP\/NCAR Reanalysis (180 km) are its higher spatial and temporal resolutions (32 km grid, 45 vertical layers, every three hours) and better treatment of the land surface. This is achieved through the use of a better land-surface model (Noah LSM), the assimilation of more observational data (precipitation, upper air and surface winds), and through a better representation of the terrain (heights, vegetation, soil type). This data set contains \"conventional\" atmospheric analyses as well as model-derived fields that contain estimates of subsurface, surface, and radiative properties. This data set is encoded in WMO GRIB format version 1 using the NCEP GRIB table 131. The model used a native, \"E-grid\" for its calculations, however data were interpolated to a Lambert Conformal Conic projection, also known as NAM 221 AWIPS Grid - High Resolution North American Master Grid (32-km Resolution). All vector components are earth relative rather than grids relative which is the convention for operational NCEP model. The list of fields produced by the NARR ETA model differ from the operational ETA model. NARR data files that are compatible with the Grid Analysis and Display System (GrADS) are available.",
"language": "",
"distribution": [
{
"@type": "dcat:Distribution",
"mediaType": "application\/json",
"accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ncdc%3AC00618"
},
{
"@type": "dcat:Distribution",
"mediaType": "text\/html",
"accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ncdc%3AC00618\/html"
},
{
"@type": "dcat:Distribution",
"mediaType": "application\/xml",
"accessURL": "https:\/\/www.ncei.noaa.gov\/metadata\/geoportal\/\/rest\/metadata\/item\/gov.noaa.ncdc%3AC00618\/xml"
},
{
"@type": "dcat:Distribution",
"mediaType": "application\/octet-stream",
"accessURL": "https:\/\/www.ncei.noaa.gov\/pub\/data\/metadata\/images\/grid-221.gif"
}
],
"bureauCode": [
"010:04"
],
"modified": "2025-11-20T02:53:36.016Z",
"publisher": {
"@type": "org:Organization",
"name": "Your Publisher"
},
"theme": "",
"keyword": [
"Earth Science > Atmosphere > Air Quality > Visibility",
"Earth Science > Atmosphere > Altitude > Geopotential Height",
"Earth Science > Atmosphere > Altitude > Barometric Altitude",
"Earth Science > Atmosphere > Altitude > Tropopause",
"Earth Science > Atmosphere > Altitude > Planetary Boundary Layer Height",
"Earth Science > Atmosphere > Atmospheric Phenomena",
"Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements",
"Earth Science > Atmosphere > Atmospheric Pressure > Planetary Boundary Layer Height",
"Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure",
"Earth Science > Atmosphere > Atmospheric Pressure > Surface Pressure",
"Earth Science > Atmosphere > Atmospheric Radiation > Albedo",
"Earth Science > Atmosphere > Atmospheric Radiation > Atmospheric Emitted Radiation",
"Earth Science > Atmosphere > Atmospheric Radiation > Heat Flux",
"Earth Science > Atmosphere > Atmospheric Radiation > Incoming Solar Radiation",
"Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation",
"Earth Science > Atmosphere > Atmospheric Radiation > Outgoing Longwave Radiation",
"Earth Science > Atmosphere > Atmospheric Radiation > Radiative Flux",
"Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation",
"Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Dew Point Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Potential Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature",
"Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Condensation",
"Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Dew Point Temperature",
"Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Evaporation",
"Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Processes > Evapotranspiration",
"Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Humidity",
"Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor Indicators > Total Precipitable Water",
"Earth Science > Atmosphere > Atmospheric Water Vapor > Water Vapor",
"Earth Science > Atmosphere > Atmospheric Winds > Surface Winds",
"Earth Science > Atmosphere > Atmospheric Winds > Upper Level Winds",
"Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Vertical Wind Velocity\/Speed",
"Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Wind Shear",
"Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Frequency",
"Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Base Height",
"Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Height",
"Earth Science > Atmosphere > Clouds > Cloud Microphysics > Cloud Liquid Water\/Ice",
"Earth Science > Atmosphere > Clouds > Cloud Precipitable Water",
"Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Pressure",
"Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Top Temperature",
"Earth Science > Atmosphere > Clouds > Cloud Types",
"Earth Science > Atmosphere > Clouds > Cloud Properties > Cloud Vertical Distribution",
"Earth Science > Atmosphere > Precipitation > Liquid Precipitation > Rain > Freezing Rain",
"Earth Science > Atmosphere > Precipitation > Precipitation Amount",
"Earth Science > Atmosphere > Precipitation > Precipitation Rate",
"Earth Science > Atmosphere > Precipitation > Liquid Precipitation > Rain",
"Earth Science > Atmosphere > Precipitation > Solid Precipitation > Ice Pellets > Sleet",
"Earth Science > Atmosphere > Precipitation > Solid Precipitation > Snow",
"Earth Science > Cryosphere > Snow\/Ice > Snow Cover",
"Earth Science > Cryosphere > Snow\/Ice > Snow Depth",
"Earth Science > Cryosphere > Snow\/Ice > Snow Melt",
"Earth Science > Terrestrial Hydrosphere > Surface Water > Surface Water Processes\/Measurements > Runoff",
"Earth Science > Land Surface > Surface Thermal Properties > Land Surface Temperature",
"Earth Science > Land Surface > Soils > Soil Moisture\/Water Content",
"Earth Science > Land Surface > Soils > Soil Temperature",
"Earth Science > Land Surface > Surface Radiative Properties > Albedo",
"Earth Science > Land Surface > Topography > Terrain Elevation > Digital Elevation\/Terrain Model (DEM)",
"Continent > North America",
"Continent > North America > Canada",
"Continent > North America > Central America",
"Continent > North America > Greenland",
"Continent > North America > Mexico",
"Continent > North America > United States Of America",
"Vertical Location > Land Surface",
"Vertical Location > Sea Surface",
"Vertical Location > Boundary Layer",
"Vertical Location > Troposphere",
"Vertical Location > Stratosphere",
"DOC\/NOAA\/NESDIS\/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce",
"DOC\/NOAA\/NESDIS\/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce",
"climatologyMeteorologyAtmosphere"
]
}