TELLUS_GRACE_MASCON_GRID_RL05_V2_1

PODAAC-TEMSC-2CL05

Version 1
  • Abstract
    This 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. It should be noted that this dataset does not correct for leakage errors across coastlines; it is therefore recommended only for users who want to apply their own algorithm to separate between land and ocean mass very near 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 summary of changes and enhancements to Version 2 (compared to Version 1) can be found here: ftp://podaac-ftp.jpl.nasa.gov/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. This product is intended for expert use only; other users are encouraged to use the CRI-filtered Mascon dataset, which is available here: http://podaac.jpl.nasa.gov/dataset/TELLUS_GRACE_MASCON_CRI_GRID_RL05_V2.

Data Identification Fields:

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    Data Dates
    Creation
    Last Revision
    Processing Level

    3

    Quality
    Collection Progress

    Not Provided

Related URLs
    Science Keywords
    • Earth Science
    • Solid Earth
    • Geodetics/Gravity
    • Gravity
    • None

Acquisition Information Fields:

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Platforms
  • SPACECRAFT
    GRACE
    Instruments
    • GRACE KBR
    • GRACE SCA
    • GRACE ACC

Temporal Information Fields:

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Spatial Information Fields:

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    Coverage Type Zone Identifier Geometry Granule Representation
    HORIZONTAL CARTESIAN CARTESIAN
Location Keywords
    • GEOGRAPHIC REGION
    • GLOBAL

Data Centers

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  • TELLUS
    PROCESSOR

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  • PO.DAAC
    ARCHIVER

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  • Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, N
    ARCHIVER
    Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA

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Data Contacts

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  • David
    Technical Contact
    David Moroni

    Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, N

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Collection Citations Fields:

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