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Description

This data set contains the monthly Global Ocean Mass Anomalies (goma) since 04/2002, as measured by the GRACE and GRACE Follow-On (G/GFO) satellite missions. The data are averaged over the global ocean domain, at monthly intervals (note: data gaps exist). This file contains the goma time series based on the spherical harmonic gravity fields provided by the G/GFO SDS centers: JPL, CSR, GFZ. The data are frequently updated as new monthly observations are acquired by the GFO mission. The processing of the spherical harmonics gravity field coefficients is as follows: (1) GAD + GSM: the monthly de-aliasing product GAD is added back to the GSM L2 gravity fields; (2) [GSM + GAD] coefficients are averaged over the global ocean with a coastal buffer of 300 km (to avoid land-ocean leakage); (3) the spatial mean of atmospheric loading of the entire global ocean domain is removed (via the GAA L2 data product). A GIA correction using the ICE-6GD model (Peltier et al., 2018) is applied.

Product Summary

Platforms
GRACE-FO ,
GRACE
Spatial Extent

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

Spatial Resolution
360 Decimal Degrees x 180 Decimal Degrees
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2002-04-17
Data Partner
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC) ,
GRACE Tellus, Jet Propulsion Laboratory, NASA (NASA/JPL/GRACE-TELLUS-0001)
Concept ID
C2263336836-POCLOUD
Data State
ACTIVE
Number of Files/Granules
6
Processing Level
4
Published
Updated
Science Keywords
Ocean Bottom Pressure ,
Sea Level Rise ,
Sea Level Anomaly

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

NASA/JPL. (2022). GRACE/GRACE-FO Level-4 Monthly Global Ocean Mass Anomaly version 01 from NASA MEaSUREs HOMaGE project [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/HMOMA-4TJ01 Date Accessed: 2025-12-13

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
goma_CSR none N/A double -99999 -1000 to 1000 1
goma_GFZ none N/A double -99999 -1000 to 1000 1
goma_JPL none N/A double -99999 -1000 to 1000 1
time_bounds_CSR time bounds for each time value for CSR center, i.e., the first day and last day included in the monthly solution days since 2002-01-01T00:00:00 double N/A N/A 1
time_bounds_GFZ time bounds for each time value for GFZ center, i.e., the first day and last day included in the monthly solution days since 2002-01-01T00:00:00 double N/A N/A 1
time_bounds_JPL time bounds for each time value for JPL center, i.e., the first day and last day included in the monthly solution days since 2002-01-01T00:00:00 double N/A N/A 1
time_CSR time days since 2002-01-01T00:00:00 double N/A N/A 1
time_GFZ time days since 2002-01-01T00:00:00 double N/A N/A 1
time_JPL time days since 2002-01-01T00:00:00 double N/A N/A 1
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