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Regional distribution of steric and mass contributions to sea level changes

Regional distribution of steric and mass contributions to sea level changes
Regional distribution of steric and mass contributions to sea level changes
The contributing factors to regional sea level variability have been explored for the period 2004–2008 based on altimetry observations, hydrographic data and GRACE measurements. The regional averaged annual cycle of the mass contribution to sea level is shown to be highly unsteady. When compared with steric-corrected altimetry, both signals are coherent, though in some regions the coherence analysis is limited by the use of interpolated hydrographic data and in the equatorial regions it is limited by the low signal-to-noise ratio of GRACE data. The closure of regional sea level budgets depends mainly on the GIA correction chosen. A reconstructed global sea level field (with the atmospheric signal eliminated) spanning the second half of the 20th century together with historical hydrographic observations are used to infer the regional mass contribution to sea level rise for the last decades. Results indicate that mass addition from continental ice is the major contributor to regional mean sea level rise for the last decades. In addition, the spatial patterns of mass rates of change point at Greenland as the main source of fresh water input.
sea level, steric sea level, GRACE, altimetry
0921-8181
206-218
Marcos, Marta
e9449b6f-834c-4239-8bb7-b611a0062412
Calafat, Francesc M.
e9a35f27-7728-44e2-8815-8be201b1fad8
Llovel, William
2ec83d88-04dc-43ea-b3ea-62eb8f32ccbc
Gomis, Damià
422ac23b-8c1f-4dbd-b2d5-35807248c3e8
Meyssignac, Benoit
ebbbe539-e5cb-46fb-9675-2329b616e71a
Marcos, Marta
e9449b6f-834c-4239-8bb7-b611a0062412
Calafat, Francesc M.
e9a35f27-7728-44e2-8815-8be201b1fad8
Llovel, William
2ec83d88-04dc-43ea-b3ea-62eb8f32ccbc
Gomis, Damià
422ac23b-8c1f-4dbd-b2d5-35807248c3e8
Meyssignac, Benoit
ebbbe539-e5cb-46fb-9675-2329b616e71a

Marcos, Marta, Calafat, Francesc M., Llovel, William, Gomis, Damià and Meyssignac, Benoit (2011) Regional distribution of steric and mass contributions to sea level changes. Global and Planetary Change, 76 (3-4), 206-218. (doi:10.1016/j.gloplacha.2011.01.007).

Record type: Article

Abstract

The contributing factors to regional sea level variability have been explored for the period 2004–2008 based on altimetry observations, hydrographic data and GRACE measurements. The regional averaged annual cycle of the mass contribution to sea level is shown to be highly unsteady. When compared with steric-corrected altimetry, both signals are coherent, though in some regions the coherence analysis is limited by the use of interpolated hydrographic data and in the equatorial regions it is limited by the low signal-to-noise ratio of GRACE data. The closure of regional sea level budgets depends mainly on the GIA correction chosen. A reconstructed global sea level field (with the atmospheric signal eliminated) spanning the second half of the 20th century together with historical hydrographic observations are used to infer the regional mass contribution to sea level rise for the last decades. Results indicate that mass addition from continental ice is the major contributor to regional mean sea level rise for the last decades. In addition, the spatial patterns of mass rates of change point at Greenland as the main source of fresh water input.

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More information

Published date: April 2011
Keywords: sea level, steric sea level, GRACE, altimetry
Organisations: Physical Oceanography

Identifiers

Local EPrints ID: 366325
URI: http://eprints.soton.ac.uk/id/eprint/366325
ISSN: 0921-8181
PURE UUID: b1464ee6-7040-4abb-8560-09712abc237e

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Date deposited: 24 Jun 2014 13:56
Last modified: 14 Mar 2024 17:06

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Contributors

Author: Marta Marcos
Author: Francesc M. Calafat
Author: William Llovel
Author: Damià Gomis
Author: Benoit Meyssignac

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