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.
Bands
Pixel Size 111320 meters
Bands
Name
Units
Pixel Size
Description
lwe_thickness_csr
cm
meters
Equivalent liquid water thickness in centimeters calculated by CSR.
lwe_thickness_gfz
cm
meters
Equivalent liquid water thickness in centimeters calculated by GFZ.
lwe_thickness_jpl
cm
meters
Equivalent liquid water thickness in centimeters calculated 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:
D.P. Chambers. 2012. GRACE MONTHLY OCEAN MASS GRIDS NETCDF
RELEASE 6.0. Ver. 4.0. PO.DAAC, CA, USA. Dataset accessed
[YYYY-MM-DD] at https://doi.org/10.5067/TEOCN-3AC64.
Chambers, D.P. and J.A. Bonin: Evaluation of Release 05
time-variable gravity coefficients over the ocean. Ocean Science 8,
859-868, 2012.
https://www.ocean-sci.net/8/859/2012.
Chambers D.P. and J. K. Willis: A Global Evaluation of Ocean Bottom
Pressure from GRACE, OMCT, and Steric-Corrected Altimetry. J.
of Oceanic and Atmosph. Technology, vol 27, pp 1395-1402.
doi:10.1175/2010JTECHO738.1,
2010.
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 …
[null,null,[],[[["\u003cp\u003eThe GRACE Tellus Monthly Mass Grids Ocean dataset provides monthly gravitational anomalies relative to a 2004-2010 time-mean baseline, represented as "Equivalent Water Thickness" in centimeters.\u003c/p\u003e\n"],["\u003cp\u003eData is calculated by three centers (CSR, GFZ, JPL) and users are recommended to use the mean of all three for most applications.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is optimized for examining regional ocean bottom pressure, but it is not intended for determining global mean ocean mass through spatial averaging.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the period from April 4, 2002, to October 25, 2017, with a spatial resolution of 111320 meters.\u003c/p\u003e\n"],["\u003cp\u003eNASA makes this GRACE mission data freely available for public use with proper acknowledgment and citation as outlined in the provided Terms of Use.\u003c/p\u003e\n"]]],[],null,["# GRACE Monthly Mass Grids Release 06 Version 04 - Ocean\n\nDataset Availability\n: 2002-04-04T00:00:00Z--2017-10-25T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA Jet Propulsion Laboratory](https://grace.jpl.nasa.gov/data/get-data/monthly-mass-grids-ocean/)\n\nTags\n:\n[crs](/earth-engine/datasets/tags/crs) [gfz](/earth-engine/datasets/tags/gfz) [grace](/earth-engine/datasets/tags/grace) [gravity](/earth-engine/datasets/tags/gravity) [jpl](/earth-engine/datasets/tags/jpl) [mass](/earth-engine/datasets/tags/mass) [nasa](/earth-engine/datasets/tags/nasa) [ocean](/earth-engine/datasets/tags/ocean) [oceans](/earth-engine/datasets/tags/oceans) [tellus](/earth-engine/datasets/tags/tellus) [water](/earth-engine/datasets/tags/water) \n\n#### Description\n\nGRACE Tellus Monthly Mass Grids provides monthly\ngravitational anomalies relative to a 2004-2010 time-mean baseline.\nThe data contained in this dataset are units of \"Equivalent Water Thickness\"\nwhich represent the deviations of mass in terms of vertical extent\nof water in centimeters. See the provider's [Monthly Mass\nGrids Overview](https://grace.jpl.nasa.gov/data/monthly-mass-grids/)\nfor more details.\n\nThe GRACE Tellus (GRCTellus) Monthly Mass Grids Ocean dataset is produced\nby three centers: CSR (U. Texas / Center for Space Research),\nGFZ (GeoForschungsZentrum Potsdam), and JPL\n(NASA Jet Propulsion Laboratory). Each center is a part\nof the GRACE Ground System and generates Level-2 data\n(spherical harmonic fields) used in this dataset.\nThe output includes spherical harmonic coefficients\nof the gravity field and of the dealiasing fields used to compute them.\nSince each center independently produces the coefficients, the results\nmay be slightly different. It is recommended for most users to\nuse the mean of all three datasets. See the provider's [choosing a\nsolution](https://grace.jpl.nasa.gov/data/choosing-a-solution/) page\nfor more details.\n\n**Note**\n\n- Land leakage correction: Ocean signals are typically weaker\n than land signals, by factors of 2 and more, on seasonal and\n interannual time scales. To minimize leakage from high land\n signals onto ocean signals, a destriping filter has been applied\n which may cause cause correlations over much larger distances.\n\n- The GRCTellus Ocean datasets are optimized to examine regional\n ocean bottom pressure, but NOT intended to be spatially\n averaged to determine global mean ocean mass.\n\n### Bands\n\n\n**Pixel Size**\n\n111320 meters\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|---------------------|-------|------------|---------------------------------------------------------------------|\n| `lwe_thickness_csr` | cm | meters | Equivalent liquid water thickness in centimeters calculated by CSR. |\n| `lwe_thickness_gfz` | cm | meters | Equivalent liquid water thickness in centimeters calculated by GFZ. |\n| `lwe_thickness_jpl` | cm | meters | Equivalent liquid water thickness in centimeters calculated by JPL. |\n\n### Image Properties\n\n**Image Properties**\n\n| Name | Type | Description |\n|----------------|--------|----------------------------------------------------------------------|\n| CSR_END_TIME | DOUBLE | End date in milliseconds of spherical harmonics solution from CSR. |\n| CSR_START_TIME | DOUBLE | Start date in milliseconds of spherical harmonics solution from CSR. |\n| GFZ_END_TIME | DOUBLE | End date in milliseconds of spherical harmonics solution from GFZ. |\n| GFZ_START_TIME | DOUBLE | Start date in milliseconds of spherical harmonics solution from GFZ. |\n| JPL_END_TIME | DOUBLE | End date in milliseconds of spherical harmonics solution from JPL. |\n| JPL_START_TIME | DOUBLE | Start date in milliseconds of spherical harmonics solution from JPL. |\n\n### Terms of Use\n\n**Terms of Use**\n\nAll NASA-produced data from the GRACE mission is made freely available\nfor the public to use. When using any of the GRCTellus data, please\nadd an acknowledgment: \"GRACE land are available at\n\u003chttps://grace.jpl.nasa.gov\u003e,\nsupported by the NASA MEaSUREs Program.\" and cite with the\ncitations provided.\n\n### Citations\n\nCitations:\n\n- D.P. Chambers. 2012. GRACE MONTHLY OCEAN MASS GRIDS NETCDF\n RELEASE 6.0. Ver. 4.0. PO.DAAC, CA, USA. Dataset accessed\n \\[YYYY-MM-DD\\] at \u003chttps://doi.org/10.5067/TEOCN-3AC64\u003e.\n- Chambers, D.P. and J.A. Bonin: Evaluation of Release 05\n time-variable gravity coefficients over the ocean. Ocean Science 8,\n 859-868, 2012.\n \u003chttps://www.ocean-sci.net/8/859/2012\u003e.\n- Chambers D.P. and J. K. Willis: A Global Evaluation of Ocean Bottom\n Pressure from GRACE, OMCT, and Steric-Corrected Altimetry. J.\n of Oceanic and Atmosph. Technology, vol 27, pp 1395-1402.\n [doi:10.1175/2010JTECHO738.1](https://doi.org/10.1175/2010JTECHO738.1),\n 2010.\n\n### DOIs\n\n- \u003chttps://doi.org/10.1175/2010JTECHO738.1\u003e\n\n### Explore with Earth Engine\n\n| **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.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.Image('NASA/GRACE/MASS_GRIDS_V04/OCEAN/20020403_20020430');\nvar equivalentWaterThicknessCsr = dataset.select('lwe_thickness_csr');\nvar equivalentWaterThicknessCsrVis = {\n min: -0.0799629208930322,\n max: 0.07938676715178997,\n palette: ['001137', '01abab', 'e7eb05', '620500']\n};\nMap.setCenter(6.746, 46.529, 1);\nMap.addLayer(\n equivalentWaterThicknessCsr, equivalentWaterThicknessCsrVis,\n 'Equivalent Water Thickness CSR');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_GRACE_MASS_GRIDS_V04_OCEAN) \n[GRACE Monthly Mass Grids Release 06 Version 04 - Ocean](/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_OCEAN) \nGRACE 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 ... \nNASA/GRACE/MASS_GRIDS_V04/OCEAN, crs,gfz,grace,gravity,jpl,mass,nasa,ocean,oceans,tellus,water \n2002-04-04T00:00:00Z/2017-10-25T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.1175/2010JTECHO738.1](https://doi.org/https://grace.jpl.nasa.gov/data/get-data/monthly-mass-grids-ocean/)\n- [https://doi.org/10.1175/2010JTECHO738.1](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_OCEAN)"]]
