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
Pixel Size
Description
lwe_thickness_csr
cm
-139.2*
74.88*
meters
Equivalent liquid water thickness in centimeters calculated by CSR.
lwe_thickness_gfz
cm
-145.45*
70.19*
meters
Equivalent liquid water thickness in centimeters calculated by GFZ.
lwe_thickness_jpl
cm
-137.94*
71.86*
meters
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.
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 …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eThis dataset is deprecated and has been replaced by a newer version: NASA/GRACE/MASS_GRIDS_V04/LAND.\u003c/p\u003e\n"],["\u003cp\u003eIt provides monthly gravity anomalies as "Equivalent Water Thickness" in centimeters, relative to a 2004-2010 baseline.\u003c/p\u003e\n"],["\u003cp\u003eData is available from April 2002 to January 2017 and includes calculations from three processing centers (CSR, GFZ, JPL).\u003c/p\u003e\n"],["\u003cp\u003eIt's recommended to use the mean of all three centers' data for most applications.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is not ideal for quantifying ice mass changes in polar regions or glaciers; a separate mascon solution is recommended for that purpose.\u003c/p\u003e\n"]]],["The GRACE Tellus Monthly Mass Grids dataset, available from 2002 to 2017, offers monthly gravitational anomalies relative to a 2004-2010 baseline. This dataset is now superseded. Data, in \"Equivalent Water Thickness\" (cm), is processed by CSR, GFZ, and JPL, each providing slightly different results, recommending users average the three. The data may be scaled using a scaling grid for accurate results, but is not optimal for ice mass change quantification. It is freely available for public use.\n"],null,["**Caution:** This dataset has been superseded by [NASA/GRACE/MASS_GRIDS_V04/LAND](/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_LAND). \n\nDataset Availability\n: 2002-04-01T00:00:00Z--2017-01-07T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA Jet Propulsion Laboratory](https://grace.jpl.nasa.gov/data/get-data/monthly-mass-grids-land/)\n\nTags\n:\n crs \n gfz \n grace \n gravity \n jpl \n land \n mass \n nasa \n surface-ground-water \n tellus \nwater \n\nDescription \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 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- Due to the sampling and post-processing of GRACE observations,\n surface mass variations at small spatial scales tend to be attenuated.\n Therefore, users should multiply the GRCTellus Land data by the\n scaling grid available at\n [NASA/GRACE/MASS_GRIDS/LAND_AUX_2014](https://code.earthengine.google.com/?asset=NASA/GRACE/MASS_GRIDS/LAND_AUX_2014).\n\n- The GRCTellus Land grids processed from the Spherical Harmonic\n Level-2 data are not suited to accurately quantify ice mass\n changes over Greenland or Antarctica, or glaciers and ice caps.\n For those areas it is recommended to use JPL's mascon\n solution available as the following image collection:\n [NASA/GRACE/MASS_GRIDS/MASCON](https://developers.google.com/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_MASCON)\n\nBands\n\n\n**Pixel Size**\n\n111320 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Description |\n|---------------------|-------|-----------|---------|---------------------------------------------------------------------|\n| `lwe_thickness_csr` | cm | -139.2\\* | 74.88\\* | Equivalent liquid water thickness in centimeters calculated by CSR. |\n| `lwe_thickness_gfz` | cm | -145.45\\* | 70.19\\* | Equivalent liquid water thickness in centimeters calculated by GFZ. |\n| `lwe_thickness_jpl` | cm | -137.94\\* | 71.86\\* | Equivalent liquid water thickness in centimeters calculated by JPL. |\n\n\\* estimated min or max value\n\nImage 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\nTerms 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\nCitations \nCitations:\n\n- S.C. Swenson. 2012. GRACE monthly land water mass grids NETCDF\n RELEASE 5.0. Ver. 5.0. PO.DAAC, CA, USA. Dataset accessed\n \\[YYYY-MM-DD\\] at\n \u003chttps://doi.org/10.5067/TELND-NC005\u003e.\n- Landerer F.W. and S. C. Swenson, Accuracy of scaled GRACE terrestrial\n water storage estimates. Water Resources Research, Vol 48, W04531, 11 PP,\n [doi:10.1029/2011WR011453](https://doi.org/10.1029/2011WR011453), 2012.\n- Swenson, S. C. and J. Wahr, Post-processing removal of correlated\n errors in GRACE data, Geophys. Res. Lett., 33, L08402,\n [doi:10.1029/2005GL025285](https://doi.org/10.1029/2005GL025285), 2006.\n\nDOIs\n\n- \u003chttps://doi.org/10.1029/2005GL025285\u003e\n- \u003chttps://doi.org/10.1029/2011WR011453\u003e\n\nExplore 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.](https://console.cloud.google.com/earth-engine)\n\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('NASA/GRACE/MASS_GRIDS/LAND')\n .filter(ee.Filter.date('2016-08-01', '2016-08-30'));\nvar equivalentWaterThicknessCsr = dataset.select('lwe_thickness_csr');\nvar equivalentWaterThicknessCsrVis = {\n min: -25.0,\n max: 25.0,\n};\nMap.setCenter(6.746, 46.529, 2);\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_LAND) \n[GRACE Monthly Mass Grids - Land \\[deprecated\\]](/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_LAND) \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/LAND, crs,gfz,grace,gravity,jpl,land,mass,nasa,surface-ground-water,tellus,water \n2002-04-01T00:00:00Z/2017-01-07T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.1029/2011WR011453](https://doi.org/https://grace.jpl.nasa.gov/data/get-data/monthly-mass-grids-land/)\n- [https://doi.org/10.1029/2011WR011453](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_LAND)"]]
