JPL GRACE Mascon Ocean, Ice, and Hydrology Equivalent Water Height RL05M.1 CRI Filtered Version 2

Please Note: This dataset is retired and will not be maintained in the future. However, this dataset is displayed for archive purposes and may not reflect the most updated information.
JPL GRACE Mascon Ocean, Ice, and Hydrology Equivalent Water Height RL05M.1 CRI Filtered Version 2
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3 Publications Cited this Dataset >>
Citation metrics available for years (2015-2017)
DOI10.5067/TEMSC-2LCR5
Short NameTELLUS_GRACE_MASCON_CRI_GRID_RL05_V2
DescriptionThis dataset represents Version 2 of the JPL GRACE Mascon Equivalent Water Height RL05M.1, providing global water storage anomalies relative to a time-mean of monthly mass grids as derived from GRACE. These data are provided in a single data file in netCDF format and is applicable for ocean, ice, and hydrology. This version of the data employs a Coastal Resolution Improvement (CRI) filter that reduces leakage errors across coastlines. The storage 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 spherical cap mass concentration functions, rather than spherical harmonic coefficients. Additionally, realistic geophysical information is introduced during the solution inversion to intrinsically remove correlated error. Thus, these Mascon solutions 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 estimated 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 the complete Mascon solution to separate land and ocean mass from individual mascons that span coastlines. 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. A summary of changes and enhancements to Version 2 (compared to Version 1) can be found in PO.DAAC Drive at https://podaac-tools.jpl.nasa.gov/drive/files/allData/tellus/L3/mascon/RL05/JPL/README.txt. As a result of these enhancements, the GRACE Project advises users to no longer continue using the Version 1 Mascon data, and to follow this recommendation we have retired the Version 1 dataset. Please refer to the 'Data Access' tab at the top of this page to gain direct access to the Mascon data. For more information, please visit http://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.
Version2
Persistent IDPODAAC-TEMSC-2LCR5
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
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Citation D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins. 2016. JPL GRACE Mascon Ocean, Ice, and Hydrology Equivalent Water Height RL05M.1 CRI Filtered Version 2. Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/TEMSC-2LCR5.

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Journal Reference Watkins, M. M., D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer (2015), Improved methods for observing Earth's time variable mass distribution with GRACE, JGR Solid Earth, 10.1002/2014JB011547.