GRACE Monthly Mass Grids - Land [deprecated]

Caution: This dataset has been superseded by NASA/GRACE/MASS_GRIDS_V04/LAND.

Dataset Availability

2002-04-01T00:00:00Z–2017-01-07T00:00:00Z

Dataset Provider

NASA Jet Propulsion Laboratory

Earth Engine Snippet

ee.ImageCollection("NASA/GRACE/MASS_GRIDS/LAND")

Tags

crs

gfz

grace

gravity

jpl

land

mass

nasa

surface-ground-water

tellus

water

Description

GRACE Tellus Monthly Mass Grids provides monthly gravitational anomalies relative to a 2004-2010 time-mean baseline. The data contained in this dataset are units of "Equivalent Water Thickness" which represent the deviations of mass in terms of vertical extent of water in centimeters. See the provider's Monthly Mass Grids Overview for more details.

The GRACE Tellus (GRCTellus) Monthly Mass Grids dataset is produced by three centers: CSR (U. Texas / Center for Space Research), GFZ (GeoForschungsZentrum Potsdam), and JPL (NASA Jet Propulsion Laboratory). Each center is a part of the GRACE Ground System and generates Level-2 data (spherical harmonic fields) used in this dataset. The output includes spherical harmonic coefficients of the gravity field and of the dealiasing fields used to compute them. Since each center independently produces the coefficients, the results may be slightly different. It is recommended for most users to use the mean of all three datasets. See the provider's choosing a solution page for more details.

Note

• Due to the sampling and post-processing of GRACE observations, surface mass variations at small spatial scales tend to be attenuated. Therefore, users should multiply the GRCTellus Land data by the scaling grid available at NASA/GRACE/MASS_GRIDS/LAND_AUX_2014.

• The GRCTellus Land grids processed from the Spherical Harmonic Level-2 data are not suited to accurately quantify ice mass changes over Greenland or Antarctica, or glaciers and ice caps. For those areas it is recommended to use JPL's mascon solution available as the following image collection: NASA/GRACE/MASS_GRIDS/MASCON

Bands

Pixel Size
111320 meters

Bands

Name	Units	Min	Max	Description
lwe_thickness_csr	cm	-139.2*	74.88*	Equivalent liquid water thickness in centimeters calculated by CSR.
lwe_thickness_gfz	cm	-145.45*	70.19*	Equivalent liquid water thickness in centimeters calculated by GFZ.
lwe_thickness_jpl	cm	-137.94*	71.86*	Equivalent liquid water thickness in centimeters calculated by JPL.

* estimated min or max value

Image Properties

Image Properties

Name	Type	Description
CSR_END_TIME	DOUBLE	End date in milliseconds of spherical harmonics solution from CSR.
CSR_START_TIME	DOUBLE	Start date in milliseconds of spherical harmonics solution from CSR.
GFZ_END_TIME	DOUBLE	End date in milliseconds of spherical harmonics solution from GFZ.
GFZ_START_TIME	DOUBLE	Start date in milliseconds of spherical harmonics solution from GFZ.
JPL_END_TIME	DOUBLE	End date in milliseconds of spherical harmonics solution from JPL.
JPL_START_TIME	DOUBLE	Start date in milliseconds of spherical harmonics solution from JPL.

Terms of Use

Terms of Use

All NASA-produced data from the GRACE mission is made freely available for the public to use. When using any of the GRCTellus data, please add an acknowledgment: "GRACE land are available at https://grace.jpl.nasa.gov, supported by the NASA MEaSUREs Program." and cite with the citations provided.

Citations

Citations:

• S.C. Swenson. 2012. GRACE monthly land water mass grids NETCDF RELEASE 5.0. Ver. 5.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/TELND-NC005.

• Landerer F.W. and S. C. Swenson, Accuracy of scaled GRACE terrestrial water storage estimates. Water Resources Research, Vol 48, W04531, 11 PP, doi:10.1029/2011WR011453, 2012.

• Swenson, S. C. and J. Wahr, Post-processing removal of correlated errors in GRACE data, Geophys. Res. Lett., 33, L08402, doi:10.1029/2005GL025285, 2006.

DOIs

• https://doi.org/10.1029/2005GL025285
• https://doi.org/10.1029/2011WR011453

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('NASA/GRACE/MASS_GRIDS/LAND')
                  .filter(ee.Filter.date('2016-08-01', '2016-08-30'));
var equivalentWaterThicknessCsr = dataset.select('lwe_thickness_csr');
var equivalentWaterThicknessCsrVis = {
  min: -25.0,
  max: 25.0,
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(
    equivalentWaterThicknessCsr, equivalentWaterThicknessCsrVis,
    'Equivalent Water Thickness CSR');

Open in Code Editor

GRACE Monthly Mass Grids - Land [deprecated]

GRACE Tellus Monthly Mass Grids provides monthly gravitational anomalies relative to a 2004-2010 time-mean baseline. The data contained in this dataset are units of "Equivalent Water Thickness" which represent the deviations of mass in terms of vertical extent of water in centimeters. See the provider's Monthly Mass Grids Overview for …

NASA/GRACE/MASS_GRIDS/LAND, crs,gfz,grace,gravity,jpl,land,mass,nasa,surface-ground-water,tellus,water

2002-04-01T00:00:00Z/2017-01-07T00:00:00Z

-90 -180 90 180

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.1029/2011WR011453
• https://doi.org/10.1029/2011WR011453