Global Data Assimilation System (GDAS)

Dataset Identification:

Resource Abstract:
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).
Citation
Title Global Data Assimilation System (GDAS)
publication  Date   2001-01-01
presentationForm  modelDigital
cited responsible party - publisher
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
cited responsible party - originator
organisation Name  DOC/NOAA/NWS/NCEP/EMC > Environmental Modeling Center, National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
Contact information
Linkage for online resource
name EMC GDAS Web Site
URL: http://www.emc.ncep.noaa.gov/gmb/gdas/
protocol HTTP
link function information
Description Web site providing overview and technical documentation for the GDAS.
target application profile  Web Browser
cited responsible party - distributor
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Contact information
Linkage for online resource
name NCEI GDAS Web Site
URL: https://www.ncdc.noaa.gov/data-access/model-data/model-datasets/global-data-assimilation-system-gdas
protocol HTTP
link function information
Description Web site providing description and access links for the GDAS.
target application profile  Information
Topic Category:  climatologyMeteorologyAtmosphere
Keywords:
Theme keywords (theme):
ATMOSPHERE > ALTITUDE > GEOPOTENTIAL HEIGHT
ATMOSPHERE > ALTITUDE > PLANETARY BOUNDARY LAYER HEIGHT
ATMOSPHERE > ALTITUDE > TROPOPAUSE
ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS
ATMOSPHERE > ATMOSPHERIC PRESSURE > PRESSURE THICKNESS
ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA LEVEL PRESSURE
ATMOSPHERE > ATMOSPHERIC PRESSURE > SURFACE PRESSURE
ATMOSPHERE > ATMOSPHERIC PRESSURE > ALBEDO
ATMOSPHERE > ATMOSPHERIC PRESSURE > LAND COVER
ATMOSPHERE > ATMOSPHERIC PRESSURE > SOIL MOISTURE/WATER CONTENT
ATMOSPHERE > ATMOSPHERIC PRESSURE > SOIL TEMPERATURE
ATMOSPHERE > ATMOSPHERIC PRESSURE > SEA SURFACE TEMPERATURE
ATMOSPHERE > ATMOSPHERIC RADIATION > ALBEDO
ATMOSPHERE > ATMOSPHERIC RADIATION > INCOMING SOLAR RADIATION
ATMOSPHERE > ATMOSPHERIC RADIATION > LONGWAVE RADIATION
ATMOSPHERE > ATMOSPHERIC RADIATION > RADIATIVE FLUX
ATMOSPHERE > ATMOSPHERIC RADIATION > SHORTWAVE RADIATION
ATMOSPHERE > ATMOSPHERIC RADIATION > SOLAR RADIATION
EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > ATMOSPHERIC STABILITY
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > BOUNDARY LAYER TEMPERATURE
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
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > DEW POINT TEMPERATURE
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > EVAPORATION
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > PRECIPITABLE WATER
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR PROFILES
ATMOSPHERE > ATMOSPHERIC WINDS > BOUNDARY LAYER WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > CONVECTION
ATMOSPHERE > ATMOSPHERIC WINDS > FLIGHT LEVEL WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > VERTICAL WIND MOTION
ATMOSPHERE > ATMOSPHERIC WINDS > VORTICITY
ATMOSPHERE > ATMOSPHERIC WINDS > WIND PROFILES
ATMOSPHERE > ATMOSPHERIC WINDS > WIND SHEAR
ATMOSPHERE > CLOUDS > TROPOSPHERIC/HIGH-LEVEL CLOUDS (OBSERVED/ANALYZED)
ATMOSPHERE > CLOUDS > TROPOSPHERIC/LOW LEVEL CLOUDS (OBSERVED/ANALYZED)
ATMOSPHERE > CLOUDS > TROPOSPHERIC/MID-LEVEL CLOUDS (OBSERVED/ANALYZED)
EARTH SCIENCE > ATMOSPHERE > PRECIPITATION > LIQUID PRECIPITATION > RAIN > FREEZING RAIN
ATMOSPHERE > PRECIPITATION > PRECIPITATION AMOUNT
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
TERRESTRIAL HYDROSPHERE > SNOW/ICE > ALBEDO
TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW COVER
TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW DEPTH
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
LAND SURFACE > SOILS > SOIL MOISTURE/WATER CONTENT
LAND SURFACE > SOILS > SOIL TEMPERATURE
OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE
thesaurus name >
Title Global Change Master Directory (GCMD) Science and Services Keywords
revision  Date   2015-08-04
Edition Version 8.1
cited responsible party - publisher
organisation Name  NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
Contact information
Linkage for online resource
name NASA GCMD Keyword Community Page
URL: https://gcmd.gsfc.nasa.gov/learn/keywords.html
protocol HTTPS
link function information
Description Overview of the NASA GCMD Keywords.
target application profile  Web Browser
Location keywords:
GEOGRAPHIC REGION > GLOBAL
thesaurus name >
Title Global Change Master Directory (GCMD) Location Keywords
revision  Date   2015-04-07
Edition Version 8.1
cited responsible party - publisher
organisation Name  NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
Contact information
Linkage for online resource
name NASA GCMD Keyword Community Page
URL: https://gcmd.gsfc.nasa.gov/learn/keywords.html
protocol HTTPS
link function information
Description Overview of the NASA GCMD Keywords.
target application profile  Web Browser
Stratum keywords:
VERTICAL LOCATION > BOUNDARY LAYER
VERTICAL LOCATION > LAND SURFACE
VERTICAL LOCATION > SEA SURFACE
VERTICAL LOCATION > TROPOSPHERE
VERTICAL LOCATION > STRATOSPHERE
thesaurus name >
Title Global Change Master Directory (GCMD) Location Keywords
revision  Date   2015-04-07
Edition Version 8.1
cited responsible party - publisher
organisation Name  NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
Contact information
Linkage for online resource
name NASA GCMD Keyword Community Page
URL: https://gcmd.gsfc.nasa.gov/learn/keywords.html
protocol HTTPS
link function information
Description Overview of the NASA GCMD Keywords.
target application profile  Web Browser
project Keywords
NOMADS > The NOAA Operational Model Archive and Distribution System
thesaurus name >
Title Global Change Master Directory (GCMD) Project Keywords
revision  Date   2015-09-10
Edition Version 8.1
cited responsible party - publisher
organisation Name  NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
Contact information
Linkage for online resource
name NASA GCMD Keyword Community Page
URL: https://gcmd.gsfc.nasa.gov/learn/keywords.html
protocol HTTPS
link function information
Description Overview of the NASA GCMD Keywords.
target application profile  Web Browser
dataCenter Keywords
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
thesaurus name >
Title Global Change Master Directory (GCMD) Data Center Keywords
revision  Date   2015-10-02
Edition Version 8.1
cited responsible party - publisher
organisation Name  NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
Contact information
Linkage for online resource
name NASA GCMD Keyword Community Page
URL: https://gcmd.gsfc.nasa.gov/learn/keywords.html
protocol HTTPS
link function information
Description Overview of the NASA GCMD Keywords.
target application profile  Web Browser
Theme keywords (theme):
Aircraft
thesaurus name >
Title Equipment > Platform
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
NOAA
DOC/NOAA/NESDIS/NCDC
thesaurus name >
Title Organization > GOVERNMENT AGENCIES-U.S. FEDERAL AGENCIES
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
Centered
Distribution
thesaurus name >
Title Property > Measure
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
Meteorology
thesaurus name >
Title Science Domain > Atmospheric Sciences
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
Buoy
Radar
thesaurus name >
Title Equipment > Instrument
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
National Centers for Environmental Information
U.S. Department of Commerce
thesaurus name >
Title Virtual International Authority File (VIAF) Corporate Names
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
IEEE
thesaurus name >
Title Organization > CONSORTIA/INSTITUTIONS
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
Satellite
thesaurus name >
Title Realm > Planetary Structure
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
Theme keywords (theme):
Observation
thesaurus name >
Title Activity > Observation
publication  Date   2018-12-15
other Citation Details  Cinergi keyword enhanced.File generated at Sat Dec 15 04:58:58 UTC 2018
purpose:
To provide initialization state grids for starting the Global Forecast System (GFS) model.
Resource language:  eng; USA
Resource progress code:  onGoing
Resource Maintenance Information
maintenance or update frequency:  daily
Spatial representation type code: 
Resource extent
Extent description
Geographic Extent
Geographic Bounding Box
extent Type Code  1
westBoundLongitude  -180.0
eastBoundLongitude  180.0
northBoundLatitude  90.0
southBoundLatitude  -90.0
Temporal Extent
ground condition 2001-01-01
Credits:
point of contact - pointOfContact
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
position Name Customer Engagement Branch
Contact information
Telephone
Voice 1-828-271-4800
Fax 1-828-271-4876
Address
151 Patton AvenueVeach-Baley Federal Building, Room 468, Asheville, NC, 28801-5001 Country USA
electronic Mail Address ncei.orders@noaa.gov
Linkage for online resource
name NOAA National Centers for Environmental Information (NCEI)
URL: https://www.ncei.noaa.gov
protocol HTTPS
link function information
Description NCEI home page with information, data access and contact information.
target application profile  Web Browser
hoursOfService 8:00 - 6:00 Eastern
point of contact - pointOfContact
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Contact information
Address
electronic Mail Address nomads.ncdc@noaa.gov
Back to top:

Scope of quality information
scope level  repository
Level Description
other component described  NOAA National Centers for Environmental Information
Resource lineage description

Resource distribution information

Distributor
distributor contact - distributor
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
position Name Customer Engagement Branch
Contact information
Telephone
Voice 1-828-271-4800
Fax 1-828-271-4876
Address
151 Patton AvenueVeach-Baley Federal Building, Room 468, Asheville, NC, 28801-5001 Country USA
electronic Mail Address ncei.orders@noaa.gov
Linkage for online resource
name NOAA National Centers for Environmental Information (NCEI)
URL: https://www.ncei.noaa.gov
protocol HTTPS
link function information
Description NCEI home page with information, data access and contact information.
target application profile  Web Browser
hoursOfService 8:00 - 6:00 Eastern
Format
Format name XML
Format version 
Standard ordering process
fees In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Digital Transfer Options
transfer Size 1
Linkage for online resource
name Global Data Assimilation System (GDAS) Landing Page
URL: https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.ncdc:C00379
protocol HTTP
link function information
Description Dataset landing page with general information and access links for the dataset.
target application profile  Description
Distributor
distributor contact - distributor
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
position Name Customer Engagement Branch
Contact information
Telephone
Voice 1-828-271-4800
Fax 1-828-271-4876
Address
151 Patton AvenueVeach-Baley Federal Building, Room 468, Asheville, NC, 28801-5001 Country USA
electronic Mail Address ncei.orders@noaa.gov
Linkage for online resource
name NOAA National Centers for Environmental Information (NCEI)
URL: https://www.ncei.noaa.gov
protocol HTTPS
link function information
Description NCEI home page with information, data access and contact information.
target application profile  Web Browser
hoursOfService 8:00 - 6:00 Eastern
Format
Format name GRIB 2
Format version 2
specification > http://www.nco.ncep.noaa.gov/pmb/docs/grib2/
Standard ordering process
fees In most cases, electronic downloads of the data are free, however fees may apply for data certifications, copies of analog materials, and data distribution on physical media.
Digital Transfer Options
transfer Size 
Linkage for online resource
name NOMADS FTP Server for GDAS
URL: ftp://nomads.ncdc.noaa.gov/GDAS/
protocol FTP
link function download
Description Dataset files available for download via FTP.
target application profile  Download

Metadata data stamp:  2017-04-24
Resource Maintenance Information
maintenance or update frequency:  asNeeded
notes: Bulk metadata change applied on 2017-04-24. See version control repository history for metadata change details.
Metadata contact - pointOfContact
organisation Name  DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
position Name ISO 19115 Metadata Contact
Contact information
Telephone
Voice 1-828-271-4800
Fax 1-828-271-4876
Address
151 Patton AvenueVeach-Baley Federal Building, Room 468, Asheville, NC, 28801-5001 Country USA
electronic Mail Address ncei.orders@noaa.gov
Linkage for online resource
name NOAA National Centers for Environmental Information (NCEI)
URL: https://www.ncei.noaa.gov
protocol HTTPS
link function information
Description NCEI home page with information, data access and contact information.
target application profile  Web Browser
hoursOfService 8:00 - 6:00 Eastern
Metadata scope code  dataset
Metadata language  eng; USA
Metadata character set encoding:   utf8
Metadata standard for this record:  ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
standard version:  ISO 19115-2:2009(E)
Metadata record identifier:  gov.noaa.ncdc:C00379

Metadata record format is ISO19139-2 XML (MI_Metadata)

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