Global Data Assimilation System (GDAS)
The Global Data Assimilation System (GDAS) is the system used by the Global Forecast System (GFS) model to place observations into a gridded model space for the purpose of starting, or initializing, weather forecasts with observed data. GDAS adds the following types of observations to a gridded, 3-D, model space: surface observations, balloon data, wind profiler data, aircraft reports, buoy observations, radar observations, and satellite observations. GDAS data are available as both input observations to GDAS and gridded output fields from GDAS. Gridded GDAS output data can be used to start the GFS model. Due to the diverse nature of the assimilated data types, input data are available in a variety of data formats, primarily Binary Universal Form for the Representation of meteorological data (BUFR) and Institute of Electrical and Electronics Engineers (IEEE) binary. The GDAS output is World Meteorological Organization (WMO) Gridded Binary (GRIB).
Resources
9 resources available
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NCEI Dataset Landing Page
TEXT/HTML -
NCEI Product Information Page
TEXT/HTML -
NCEI Direct Download (Dataset Files)
TEXT/HTML -
NCEI Dataset Order (GDAS - Daily Bufr Files)
PLACEHOLDER/VALUE -
NCEI Dataset Order (GDAS - Hourly Tar Files)
PLACEHOLDER/VALUE -
NCEI Dataset Order (GDAS - Daily Tar Files)
PLACEHOLDER/VALUE -
Global Change Master Directory (GCMD) Keywords
TEXT/HTML -
EMC GDAS Web Site
TEXT/HTML -
NOAA National Centers for Environmental Information (NCEI)
TEXT/HTML
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| accrualPeriodicity | R/P1D |
| contactPoint |
{
"fn": "NOAA National Centers for Environmental Information",
"@type": "vcard:Contact",
"hasEmail": "mailto:ncei.orders@noaa.gov"
}
|
| describedByType | application/octet-steam |
| description | The Global Data Assimilation System (GDAS) is the system used by the Global Forecast System (GFS) model to place observations into a gridded model space for the purpose of starting, or initializing, weather forecasts with observed data. GDAS adds the following types of observations to a gridded, 3-D, model space: surface observations, balloon data, wind profiler data, aircraft reports, buoy observations, radar observations, and satellite observations. GDAS data are available as both input observations to GDAS and gridded output fields from GDAS. Gridded GDAS output data can be used to start the GFS model. Due to the diverse nature of the assimilated data types, input data are available in a variety of data formats, primarily Binary Universal Form for the Representation of meteorological data (BUFR) and Institute of Electrical and Electronics Engineers (IEEE) binary. The GDAS output is World Meteorological Organization (WMO) Gridded Binary (GRIB). |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "NCEI Dataset Landing Page",
"accessURL": "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ncdc:C00379/html",
"mediaType": "text/html",
"description": "Landing page for the dataset.",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "NCEI Product Information Page",
"accessURL": "https://www.ncei.noaa.gov/products/weather-climate-models/global-data-assimilation",
"mediaType": "text/html",
"description": "Description of the data and related resources.",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "NCEI Direct Download (Dataset Files)",
"accessURL": "https://www.ncei.noaa.gov/oa/prod-model/index.html#ncep-global-data-assimilation/",
"mediaType": "text/html",
"description": "Direct download for the dataset.",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "NCEI Dataset Order (GDAS - Daily Bufr Files)",
"mediaType": "placeholder/value",
"description": "Select and order files in the offline archive.",
"downloadURL": "https://www.ncei.noaa.gov/has/HAS.FileAppRouter?datasetname=GDAS_DyBuf&subqueryby=STATION&applname=&outdest=FILE",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "NCEI Dataset Order (GDAS - Hourly Tar Files)",
"mediaType": "placeholder/value",
"description": "Select and order files in the offline archive.",
"downloadURL": "https://www.ncei.noaa.gov/has/HAS.FileAppRouter?datasetname=GDAS_Hrly&subqueryby=STATION&applname=&outdest=FILE",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "NCEI Dataset Order (GDAS - Daily Tar Files)",
"mediaType": "placeholder/value",
"description": "Select and order files in the offline archive.",
"downloadURL": "https://www.ncei.noaa.gov/has/HAS.FileAppRouter?datasetname=GDAS_Dy&subqueryby=STATION&applname=&outdest=FILE",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "Global Change Master Directory (GCMD) Keywords",
"accessURL": "https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords",
"mediaType": "text/html",
"description": "The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords.",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "EMC GDAS Web Site",
"accessURL": "http://www.emc.ncep.noaa.gov/gmb/gdas/",
"mediaType": "text/html",
"description": "Web site providing overview and technical documentation for the GDAS.",
"describedByType": "application/octet-stream"
},
{
"@type": "dcat:Distribution",
"title": "NOAA National Centers for Environmental Information (NCEI)",
"accessURL": "https://www.ncei.noaa.gov",
"mediaType": "text/html",
"description": "NCEI home page with information, data access and contact information.",
"describedByType": "application/octet-stream"
}
]
|
| identifier | https://data.noaa.gov/waf/NOAA/NESDIS/ncei/aim/iso/xml/C00379.xml |
| issued | 2001-01-01T00:00:00.000+00:00 |
| keyword |
[
"Earth Science > Atmosphere > Altitude > Geopotential Height",
"Earth Science > Atmosphere > Altitude > Planetary Boundary Layer Height",
"Earth Science > Atmosphere > Altitude > Tropopause",
"Earth Science > Atmosphere > Atmospheric Pressure > Atmospheric Pressure Measurements",
"Earth Science > Atmosphere > Atmospheric Pressure > Pressure Thickness",
"Earth Science > Atmosphere > Atmospheric Pressure > Sea Level Pressure",
"Earth Science > Atmosphere > Atmospheric Pressure > Surface Pressure",
"Earth Science > Atmosphere > Atmospheric Pressure > Albedo",
"Earth Science > Atmosphere > Atmospheric Pressure > Land Cover",
"Earth Science > Atmosphere > Atmospheric Pressure > Soil Moisture/Water Content",
"Earth Science > Atmosphere > Atmospheric Pressure > Soil Temperature",
"Earth Science > Atmosphere > Atmospheric Pressure > Sea Surface Temperature",
"Earth Science > Atmosphere > Atmospheric Radiation > Albedo",
"Earth Science > Atmosphere > Atmospheric Radiation > Incoming Solar Radiation",
"Earth Science > Atmosphere > Atmospheric Radiation > Longwave Radiation",
"Earth Science > Atmosphere > Atmospheric Radiation > Radiative Flux",
"Earth Science > Atmosphere > Atmospheric Radiation > Shortwave Radiation",
"Earth Science > Atmosphere > Atmospheric Radiation > Solar Radiation",
"Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Air Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Atmospheric Stability",
"Earth Science > Atmosphere > Atmospheric Temperature > Boundary Layer Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Dew Point Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Upper Air Temperature > Vertical Profiles > Inversion Height",
"Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Potential Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature > Skin Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Surface Temperature",
"Earth Science > Atmosphere > Atmospheric Temperature > Upper Air Temperature",
"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 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 Water Vapor > Water Vapor Profiles",
"Earth Science > Atmosphere > Atmospheric Winds > Boundary Layer Winds",
"Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Convection",
"Earth Science > Atmosphere > Atmospheric Winds > Upper Level Winds > Flight Level Winds",
"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 > Vorticity",
"Earth Science > Atmosphere > Atmospheric Winds > Wind Profiles",
"Earth Science > Atmosphere > Atmospheric Winds > Wind Dynamics > Wind Shear",
"Earth Science > Atmosphere > Clouds > Tropospheric/High-Level Clouds (observed/Analyzed)",
"Earth Science > Atmosphere > Clouds > Tropospheric/Low Level Clouds (observed/Analyzed)",
"Earth Science > Atmosphere > Clouds > Tropospheric/Mid-Level Clouds (observed/Analyzed)",
"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 > Terrestrial Hydrosphere > Snow/Ice > Albedo",
"Earth Science > Terrestrial Hydrosphere > Snow/Ice > Snow Cover",
"Earth Science > Terrestrial Hydrosphere > Snow/Ice > Snow Depth",
"Earth Science > Oceans > Sea Ice > Sea Ice Concentration",
"Earth Science > Land Surface > Surface Radiative Properties > Albedo",
"Earth Science > Land Surface > Land Use/Land Cover > Land Use/Land Cover Classification > Vegetation Index",
"Earth Science > Land Surface > Soils > Soil Moisture/Water Content",
"Earth Science > Land Surface > Soils > Soil Temperature",
"Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature",
"Geographic Region > Global",
"Vertical Location > Boundary Layer",
"Vertical Location > Land Surface",
"Vertical Location > Sea Surface",
"Vertical Location > Troposphere",
"Vertical Location > Stratosphere",
"NOMADS > The NOAA Operational Model Archive and Distribution System",
"DOC/NOAA/NESDIS/NCDC > National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce",
"DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce"
]
|
| landingPage | http://www.emc.ncep.noaa.gov/gmb/gdas/ |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2001-01-01T00:00:00.000+00:00 |
| publisher |
{
"name": "NOAA National Centers for Environmental Information",
"@type": "org:Organization"
}
|
| spatial | 180.0,-90.0,-180.0,90.0 |
| temporal | 2001-01-01T00:00:00+00:00/2001-01-01T00:00:00+00:00 |
| title | Global Data Assimilation System (GDAS) |
