Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 41, Issue 5, Pages 1639-1643Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2013GL059039
Keywords
sea level; climate change; land motion; geodesy; tide gauge; GPS
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Funding
- French CECILE [ANR-09-CEP-001-01]
- Spanish Ministry of Science
- NERC [BIGF010001] Funding Source: UKRI
- Natural Environment Research Council [BIGF010001] Funding Source: researchfish
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Tide gauge records are the primary source of sea level information over multidecadal to century timescales. A critical issue in using this type of data to determine global climate-related contributions to sea level change concerns the vertical motion of the land upon which the gauges are grounded. Here we use observations from the Global Positioning System for the correction of this vertical land motion. As a result, the spatial coherence in the rates of sea level change during the twentieth century is highlighted at the local and the regional scales, ultimately revealing a clearly distinct behavior between the Northern and the Southern Hemispheres with values of 2.0mm/yr and 1.1mm/yr, respectively. Our findings challenge the widely accepted value of global sea level rise for the twentieth century.
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