GRACE Monthly Mass Grids Release 06 Version 04 - 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_V04/LAND")

Tags

crs gfz grace gravity jpl land mass nasa tellus water

Description

The monthly land mass grids contain water mass anomalies given as equivalent water thickness derived from GRACE & GRACE-FO time-variable gravity observations during the specified timespan, and relative to the specified time-mean reference period. The equivalent water thickness represents the total terrestrial water storage anomalies from soil moisture, snow, surface water (incl. rivers, lakes, reservoirs etc.), as well as groundwater and aquifers. A glacial isostatic adjustment (GIA) correction has been applied, and standard corrections for geocenter (degree-1), C20 (degree-20) and C30 (degree-30) are incorporated. Post-processing filters have been applied to reduce correlated errors. Version 04 (v04) of the terrestrial water storage data uses updated and consistent C20 and Geocenter corrections (i.e., Technical Notes TN-14 and TN-13), as well as an ellipsoidal correction to account for the non-spherical shape of the Earth when mapping gravity anomalies to surface mass change.

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.

Bands

Resolution
111320 meters

Bands

Name	Units	Description
lwe_thickness_csr	cm	Equivalent liquid water thickness in centimeters calculated by CSR.
lwe_thickness_gfz	cm	Equivalent liquid water thickness in centimeters calculated by GFZ.
lwe_thickness_jpl	cm	Equivalent liquid water thickness in centimeters calculated by JPL.
uncertainty_csr		Error estimation by CSR.
uncertainty_gfz		Error estimation by GFZ.
uncertainty_jpl		Error estimation by JPL.

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:

• Felix Landerer. 2021. TELLUS_GRAC_L3_JPL_RL06_LND_v04. Ver. RL06 v04. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/TELND-3AJ64.

• 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

Explore with Earth Engine

Important: Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please register for Earth Engine access.

Code Editor (JavaScript)

var dataset = ee.Image('NASA/GRACE/MASS_GRIDS_V04/LAND/20170501_20170522');
var lwe_thickness = dataset.select('lwe_thickness_csr');
var palette = ['001137', '01abab', 'e7eb05', '620500'];
var equivalentWaterThicknessCsrVis = {
  palette: palette,
  min: -0.7845402964290882,
  max: 0.5693220260300134
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(
    lwe_thickness, equivalentWaterThicknessCsrVis,
    'Equivalent Water Thickness CSR');

Open in Code Editor

GRACE Monthly Mass Grids Release 06 Version 04 - Land

The monthly land mass grids contain water mass anomalies given as equivalent water thickness derived from GRACE & GRACE-FO time-variable gravity observations during the specified timespan, and relative to the specified time-mean reference period. The equivalent water thickness represents the total terrestrial water storage anomalies from soil moisture, snow, surface …

NASA/GRACE/MASS_GRIDS_V04/LAND, crs,gfz,grace,gravity,jpl,land,mass,nasa,tellus,water

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

Google Earth Engine

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

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