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Description

A Group for High Resolution Sea Surface Temperature (GHRSST) global Level 4 sea surface temperature analysis produced daily on a 0.25-degree grid at Remote Sensing Systems. This product uses optimal interpolation (OI) from microwave (MW) sensors including the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI), the NASA Advanced Microwave Scanning Radiometer-EOS (AMSR-E), the WindSat on the Coriolis satellite, the Global Precipitation Measurement (GPM) Microwave Imager (GMI), and the Advanced Microwave Scanning Radiometer 2 (AMSR2) onboard the GCOM-W1 satellite. These MW sensors are used through the SST production based on the sensor data availability. The through-cloud capabilities of microwave radiometers provide a valuable picture of global sea surface temperature (SST). This analysis does not use any in situ SST data such as drifting buoy SST. Compared with the previous version 5.0 dataset, version 5.1 is processed using updated input files, the sensor-specific error statistics (SSES) for each microwave sensor are updated, and deficiencies in the OI processing have been addressed.

Product Summary

Platforms
GCOM-W1 ,
GPM ,
Aqua ,
TRMM ,
CORIOLIS
Instruments
AMSR2 ,
GMI ,
AMSR-E ,
TMI ,
WINDSAT
Spatial Extent

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

Spatial Resolution
0.25 Decimal Degrees x 0.25 Decimal Degrees
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1997-12-31
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC) ,
Remote Sensing Systems (RSS)
Concept ID
C2205105895-POCLOUD
Data State
ACTIVE
Number of Files/Granules
10207
Processing Level
4
Published
Updated
Science Keywords
Sea Surface Foundation 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

REMSS. (2022). GHRSST Level 4 MW_OI Global Foundation Sea Surface Temperature analysis version 5.1 from REMSS [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/GHMWO-4FR51 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
analysed_sst analysed sea surface temperature K short -32768 -32767 to 32767 0.000839259
analysis_error estimated error standard deviation of analysed_sst K short -32768 -32767 to 32767 1.5259255E-5
lat geographical coordinates, WGS84 datum degrees_north float N/A -90 to 90 1
lon geographical coordinates, WGS84 datum degrees_east float N/A -180 to 180 1
mask land sea ice lake bit mask N/A byte -128 0 to 127 1
sea_ice_fraction sea ice area fraction N/A byte -128 0 to 100 0.01
time nominal time of L4 analysis seconds since 1981-01-01 00:00:00 int N/A N/A 1
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