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 Ocean 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
\nLand leakage correction: Ocean signals are typically weaker
than land signals, by factors of 2 and more, on seasonal and
interannual time scales. To minimize leakage from high land
signals onto ocean signals, a destriping filter has been applied
which may cause cause correlations over much larger distances.
The GRCTellus Ocean datasets are optimized to examine regional
ocean bottom pressure, but NOT intended to be spatially
averaged to determine global mean ocean mass.
A filtered version of the GRCTellus Ocean dataset is also available
which uses an alternative filtering method which may reduce leakage
errors, and have results which agree better with altimetric sea surface
height. NASA/GRACE/MASS_GRIDS/OCEAN_EOFR.
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 Ocean 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
Land leakage correction: Ocean signals are typically weaker
than land signals, by factors of 2 and more, on seasonal and
interannual time scales. To minimize leakage from high land
signals onto ocean signals, a destriping filter has been applied
which may cause cause correlations over much larger distances.
The GRCTellus Ocean datasets are optimized to examine regional
ocean bottom pressure, but NOT intended to be spatially
averaged to determine global mean ocean mass.
A filtered version of the GRCTellus Ocean dataset is also available
which uses an alternative filtering method which may reduce leakage
errors, and have results which agree better with altimetric sea surface
height. NASA/GRACE/MASS_GRIDS/OCEAN_EOFR.
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 | 0.6.2 |
Keywords | CRS, GFZ, JPL, NASA, grace, gravity, mass, ocean, tellus, water |
License | proprietary |
Temporal Extent | 7/30/2002, 5:00:00 PM - 1/4/2017, 4:00:00 PM |
Citation | D.P. Chambers. 2012. GRACE MONTHLY OCEAN MASS GRIDS NETCDF RELEASE 5.0. Ver. 5.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at [https://doi.org/10.5067/TEOCN-0N005](https://doi.org/10.5067/TEOCN-0N005). |
Type | image_collection |
GSD | arc degreem |
cube:dimensions | {"x":{"type":"spatial","axis":"x","extent":[-180,180]},"y":{"type":"spatial","axis":"y","extent":[-90,90]},"temporal":{"type":"temporal","extent":["2002-07-31T00:00:00Z","2017-01-05T00:00:00Z"]},"bands":{"type":"bands","values":["lwe_thickness_csr","lwe_thickness_gfz","lwe_thickness_jpl"]}} |