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Description

A Group for High Resolution Sea Surface Temperature (GHRSST) Level 4 sea surface temperature analysis produced daily on an operational basis by the Danish Meteorological Institute (DMI) using an optimal interpolation (OI) approach on a global 0.05 degree grid. The analysis is based upon nighttime GHRSST L2P skin and subskin SST observations from several satellites. The sensors include the Advanced Very High Resolution Radiometer (AVHRR), the Spinning Enhanced Visible and Infrared Imager (SEVIRI), the Advanced Microwave Scanning Radiometer 2 (AMSR2), the Visible Infrared Imager Radiometer Suite (VIIRS), and the Moderate Resolution Imaging Spectroradiometer (MODIS) on Aqua. An ice field from the EUMETSAT OSI-SAF is used to mask out areas with ice. This dataset adheres to the version 2 GHRSST Data Processing Specification (GDS).

Product Summary

Platforms
Aqua ,
MSG ,
Terra ,
NOAA-20 ,
Suomi-NPP ,
GCOM-W1 ,
METOP-A
Instruments
MODIS ,
SEVIRI ,
AVHRR-3 ,
VIIRS ,
AMSR2
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
0.05 Decimal Degrees x 0.05 Decimal Degrees
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2013-04-30
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC) ,
Danish Meteorological Institute, Center for Ocean and Ice (DMI/COI)
Concept ID
C2036881727-POCLOUD
Data State
ACTIVE
Number of Files/Granules
4589
Processing Level
4
Published
Updated
Science Keywords
Sea Surface Temperature

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

DMI COI. (2007). GHRSST Level 4 DMI_OI Global Foundation Sea Surface Temperature Analysis (GDS version 2) [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/GHGDM-4FD02 Date Accessed: 2025-12-14

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
lat geographical coordinates, WGS84 projection degrees_north float N/A -90 to 90 1
lon geographical coordinates, WGS84 projection degrees_east float N/A -180 to 180 1
mask Mask can be used to further filter the data N/A byte -128 1 to 31 1
time Nominal time of Level 4 analysis seconds since 1981-01-01 00:00:00 int N/A N/A 1
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