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
\nDue 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
Version Release 05
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
Name | Description | Gee Unit |
---|---|---|
lwe_thickness_csr | Equivalent liquid water thickness in centimeters calculated by CSR. | cm |
lwe_thickness_gfz | Equivalent liquid water thickness in centimeters calculated by GFZ. | cm |
lwe_thickness_jpl | Equivalent liquid water thickness in centimeters calculated by JPL. | cm |
Providers | |
---|---|
NASA Jet Propulsion Laboratory (producer, licensor) | |
Google Earth Engine (host) | |
STAC Version | 0.6.0 |
Keywords | CRS, GFZ, JPL, NASA, grace, gravity, land, mass, tellus, water |
License | proprietary |
Temporal Extent | 3/31/2002, 4:00:00 PM - 2/2/2017, 4:00:00 PM |
Citation | 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](https://doi.org/10.5067/TELND-NC005). |
Type | image_collection |
GSD | arc degreem |
Asset schema | {"name":"CSR_END_TIME","description":"End date in milliseconds of spherical harmonics solution from CSR.","type":"DOUBLE"},{"name":"CSR_START_TIME","description":"Start date in milliseconds of spherical harmonics solution from CSR.","type":"DOUBLE"},{"name":"GFZ_END_TIME","description":"End date in milliseconds of spherical harmonics solution from GFZ.","type":"DOUBLE"},{"name":"GFZ_START_TIME","description":"Start date in milliseconds of spherical harmonics solution from GFZ.","type":"DOUBLE"},{"name":"JPL_END_TIME","description":"End date in milliseconds of spherical harmonics solution from JPL.","type":"DOUBLE"},{"name":"JPL_START_TIME","description":"Start date in milliseconds of spherical harmonics solution from JPL.","type":"DOUBLE"} |