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| Titel |
Consistent estimate of ocean warming, land ice melt and sea level rise from Observations |
| VerfasserIn |
Alejandro Blazquez, Benoit Meyssignac, Jean Michel Lemoine |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250127421
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| Publikation (Nr.) |
 EGU/EGU2016-7298.pdf |
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| Zusammenfassung |
| Based on the sea level budget closure approach, this study investigates the consistency of
observed Global Mean Sea Level (GMSL) estimates from satellite altimetry, observed
Ocean Thermal Expansion (OTE) estimates from in-situ hydrographic data (based on
Argo for depth above 2000m and oceanic cruises below) and GRACE observations
of land water storage and land ice melt for the period January 2004 to December
2014.
The consistency between these datasets is a key issue if we want to constrain missing
contributions to sea level rise such as the deep ocean contribution. Numerous previous studies
have addressed this question by summing up the different contributions to sea level rise and
comparing it to satellite altimetry observations (see for example Llovel et al. 2015, Dieng et
al. 2015). Here we propose a novel approach which consists in correcting GRACE solutions
over the ocean (essentially corrections of stripes and leakage from ice caps) with
mass observations deduced from the difference between satellite altimetry GMSL
and in-situ hydrographic data OTE estimates. We check that the resulting GRACE
corrected solutions are consistent with original GRACE estimates of the geoid
spherical harmonic coefficients within error bars and we compare the resulting GRACE
estimates of land water storage and land ice melt with independent results from the
literature.
This method provides a new mass redistribution from GRACE consistent with observations
from Altimetry and OTE. We test the sensibility of this method to the deep ocean contribution
and the GIA models and propose best estimates. |
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