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

• Published in: The Cryosphere
• Main Authors: Oerlemans, J., Dyurgerov, M., van de Wal, R. S. W.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2007
• Subjects: article; Verlagsveröffentlichung; The Cryosphere
• Online Access: https://doi.org/10.5194/tc-1-59-2007; https://noa.gwlb.de/receive/cop_mods_00031889; https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00031843/tc-1-59-2007.pdf; https://tc.copernicus.org/articles/1/59/2007/tc-1-59-2007.pdf

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.