1 Satellite Measurements of Sea Level Change: Where Have We Been and Where Are We Going

Our understanding of sea level change has improved considerably over the last decade. Present-day knowledge of sea-level change is derived from tide gauge observations and satellite altimetry measurements. The average rate of sea level change obtained from tide gauges over the last century is +1.8 m...

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Bibliographic Details
Main Authors: R. S. Nerem, D. P. Chambers, E. W. Leuliette, G. T. Mitchum, A. Cazenave
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Greenland
Antarc*
Antarctica
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.2296
http://earth.esa.int/workshops/venice06/participants/1092/paper_venice06.pdf
Description
Summary:Our understanding of sea level change has improved considerably over the last decade. Present-day knowledge of sea-level change is derived from tide gauge observations and satellite altimetry measurements. The average rate of sea level change obtained from tide gauges over the last century is +1.8 mm/year. In comparison, altimeter measurements have shown an average rise of +3.2 ± 0.4 mm/year since 1992. The causes of the present-day rate are a combination of increases in ocean temperatures and land ice melt from mountain glaciers, Greenland, and Antarctica. New satellite technologies, such as InSAR, GRACE and ICESat are making significant contributions to understanding sea level change. 1.

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