Data · dataset · 2026
Correction of GRACE measurements of the Earth's moment of inertia (MOI)
Listed in National Center for Atmospheric Research
The widely used 15-year Gravity Recovery and Climate Experiment (GRACE) data sets do not conserve global total mass.
Description
They have a spurious decreasing trend of similar to 280 Gt/year. Various regions contribute differently to the global total mass loss error, with the Greenland Ice Sheet (GrIS) generating similar to 10% of the error alone.
Atmospheric parameters from reanalysis datasets drive a well-tested ice model to generate mass variation time series over the GrIS for 2002-2015. Because shorter timescale spikes of similar to 10-30 Gt in GRACE measurements are physically based, only the overall trend of similar to 30 Gt/year requires correcting. A more accurate mass loss rate estimate for 2002-2015 is similar to 120 Gt/year, considerably below previous estimates.
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With the water redistribution to lower latitudes and other effects from a warming climate, the nontidal Earth moment of inertia (MOI) also increases. After rectification, the GRACE measured mass redistribution shows a steady, statistically robust (passed a two-tailed t-test at p = 0.04 for dof = 15) rate of MOI increase reaching similar to 10.1 x 10(27) kg m(2)/year, equivalent to a 10.91 mu s/year increase in the length of a day, during 2002-2017.
Links
Get the data
- Publisher page n2t.org/ark:/85065/d71r6v5w ↗
documentation · download · from data ucar edu
Where it is published
- data.ucar.edu /dataset/correction-of-grace-measurements-of-the-earths-moment-… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=3d3015d7-9c51-408c-95c0-e19d0a2f1… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | 3d3015d7-9c51-408c-95c0-e19d0a2f169e | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |