JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height Coastal Resolution Improvement (CRI) Filtered Release 06.1 Version 03

(TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.1_V3)
VersionRL06.1Mv03
Processing Level3
Start/Stop Date2002-Apr-04 to Present
Short NameTELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.1_V3
DescriptionThis dataset contains gridded monthly global water storage/height anomalies relative to a time-mean, derived from GRACE and GRACE-FO and processed at JPL using the Mascon approach (RL06.1Mv03). This version of the data employs a Coastal Resolution Improvement (CRI) filter that reduces signal leakage errors across coastlines. These data are provided in a single data file in netCDF format, and can be used for analysis for ocean, ice, and hydrology phenomena. The water storage/height anomalies are given in equivalent water thickness units (cm). The solution provided here is derived from solving for monthly gravity field variations in terms of geolocated spherical cap mass concentration functions, rather than global spherical harmonic coefficients. Additionally, realistic geophysical information is introduced during the solution inversion to intrinsically remove correlated error. Thus, these Mascon grids do not need to be destriped or smoothed, like traditional spherical harmonic gravity solutions. The complete Mascon solution consists of 4,551 relatively independent estimates of surface mass change that have been derived using an equal-area 3-degree grid of individual mascons. A subset of these individual mascons span coastlines, and contain mixed land and ocean mass change signals. In a post-processing step, the CRI filter is applied to those mixed land/ocean Mascons to separate land and ocean mass. The land mask used to perform this separation is provided in the same directory as this dataset. Since the individual mascons act as an inherent smoother on the gravity field, a set of optional gain factors (for continental hydrology applications) that can be applied to the solution to study mass change signals at sub-mascon resolution is also provided within the same data directory as the Mascon data. This RL06.1Mv03 is an updated version of the previous Tellus JPL Mascon RL06Mv02 (DOI, 10.5067/TEMSC-3JC62). RL06.1Mv03 differs from RL06Mv02 only in the Level-1B accelerometer transplant data that is used for the GF2 (GRACE-FO 2) satellite; RL06.1Mv03 uses the ACH data product For more information, please visit https://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/. For a detailed description on the Mascon solution, including the mathematical derivation, implementation of geophysical constraints, and solution validation, please see Watkins et al., 2015, doi: 10.1002/2014JB011547. For a detailed description of the CRI filter implementation, please see Wiese et al., 2016, doi:10.1002/2016WR019344.
DOI10.5067/TEMSC-3JC63
MeasurementTERRESTRIAL HYDROSPHERE > WATER BUDGET > TERRESTRIAL WATER STORAGE
TERRESTRIAL HYDROSPHERE > GROUND WATER
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER MASS BALANCE/ICE SHEET MASS BALANCE
Platform/Sensor
ProjectGravity Recovery and Climate Experiment (GRACE)
ProjectGravity Recovery and Climate Experiment Follow-On (GRACE-FO)
Data ProviderPublisher: TELLUS
Creator: D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins
Release Place: JPL/PO.DAAC
Release Date: 2023-Jan-25
Resource: http://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/

FormatnetCDF-4
Keyword(s)Tellus, Mascon, Ocean Mass, Water Height, Water Mass, Gravity, Ocean Bottom Pressure, RL06.1Mv03, Sea Level, GRACE-FO, Terrestrial Water Storage
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Spatial Resolution: 0.5 Decimal Degrees x 0.5 Decimal Degrees
Temporal Resolution: Monthly - < Annual
 
Coverage
Region: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2002-Apr-04 to Present
Granule Time Span: 2002-Apr-16 to 2024-Feb-15
 
Projection
Projection Type: Equal Area Spherical Lat-Lon
Projection Detail: Geolocation information included for each pixel
Ellipsoid: WGS 84
 
NameLong NameUnit
latlatitudedegrees_north
lat_boundslatitude boundariesdegrees_north
lonlongitudedegrees_east
lon_boundslongitude boundariesdegrees_east
lwe_thicknessLiquid_Water_Equivalent_Thicknesscm
timetimedays since 2002-01-01T00:00:00Z
time_boundstime boundariesdays since 2002-01-01T00:00:00Z
uncertaintyuncertaintycm
IMPORTANT NOTICE
GENERAL DOCUMENTATION
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DATA RECIPE
DATA CITATION POLICY
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins. 2023. JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water Height CRI Filtered. Ver. RL06.1Mv03. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/TEMSC-3JC63

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For more information see Data Citations and Acknowledgments.

Journal Reference Watkins, M. M., Wiese, D. N., Yuan, D. N., Boening, C., & Landerer, F. W.. 2015. Improved methods for observing Earth's time variable mass distribution with GRACE using spherical cap mascons: Improved Gravity Observations from GRACE., Journal of Geophysical Research: Solid Earth, 120, 4. 10.1002/2014JB011547