Reconstructing the glacier contribution to sea-level rise back to 1850

We present a method to estimate the glacier contribution to sea-level rise from glacier length records. These records form the only direct evidence of glacier changes prior to 1946, when the first continuous mass-balance observations began. A globally representative length signal is calculated from...

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Bibliographic Details
Main Authors: J. Oerlemans, M. Dyurgerov, R. S. W. van de Wal
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2007
Subjects:
geo
Online Access:http://www.the-cryosphere.net/1/59/2007/tc-1-59-2007.pdf
https://doaj.org/article/a2d05dbba19e41ddad1ae8c3086667e4
Description
Summary:We present a method to estimate the glacier contribution to sea-level rise from glacier length records. These records form the only direct evidence of glacier changes prior to 1946, when the first continuous mass-balance observations began. A globally representative length signal is calculated from 197 length records from all continents by normalisation and averaging of 14 different regions. Next, the resulting signal is calibrated with mass-balance observations for the period 1961–2000. We find that the glacier contribution to sea level rise was 5.5±1.0 cm during the period 1850–2000 and 4.5±0.7 cm during the period 1900–2000.