Global gridded physical profile data from the U.S. Navy's Generalized Digital Environmental Model (GDEM) product database (NODC Accession 9600094)

Metadata Updated: February 27, 2019

The Generalized Digital Environmental Model (GDEM) is a four-dimensional (4-D) steady-state digital model of ocean temperature and salinity. The model consists of gridded sets of coefficients with a grid spacing of 30 arcminutes (') in space and 3, 6, or 12 months in time with the exception of the coefficient describing sea-surface temperature, which is gridded at a 1-month interval. Utilizing these coefficient sets with the appropriate one-dimensional linear or cubic spline interpolation in time, vertical profiles of historical temperature and salinity extending from the surface to the bottom may be computed for a desired time for all locations where the water depth is at least 100 m.

The VGDEM is a 4-D model of ocean temperature variability. A number of accumulations and parameters exists for each grid cell such that statistics on the observations can be derived; statistics based on comparing the observations with GDEM can be computed; and statistics computed for the mixed-layer depth and the in-layer and below-layer gradients. The percent of the observations suggesting half-channel is also available. Variability models will be constructed only in the ocean basins where data density permits. Therefore, models for the South Atlantic, South Pacific, and Arctic Oceans will not be developed at this time.

The original source of data for the construction of these climatological models is the Master Oceanographic Observation Data Set (MOODS), which contains over 4.5-million profiles of temperature/salinity dating back to 1920. This data base is maintained by NAVOCEANO and is continually updated.

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Dates

Metadata Date November 27, 2018
Metadata Created Date September 26, 2015
Metadata Updated Date February 27, 2019
Reference Date(s) January 18, 2012 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NOAA CSW Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Date November 27, 2018
Metadata Created Date September 26, 2015
Metadata Updated Date February 27, 2019
Reference Date(s) January 18, 2012 (publication)
Responsible Party (Point of Contact)
Contact Email
Access Constraints Cite as: Allen, R L, Jr.; US Navy > Naval Oceanographic Office (2012). Global gridded physical profile data from the U.S. Navy's Generalized Digital Environmental Model (GDEM) product database (NODC Accession 9600094). Version 1.1. National Oceanographic Data Center, NOAA. Dataset. [access date], NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Bbox East Long 180
Bbox North Lat 90
Bbox South Lat -60
Bbox West Long -180
Coupled Resource
Frequency Of Update asNeeded
Guid gov.noaa.nodc:9600094
Harvest Object Id aa548576-a357-44e9-927d-22279c625648
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence accessLevel: Public
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1920-01-01
Temporal Extent End 1996-06-01

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