View in EDS

Evolution of glacial lakes from the Northern Patagonia Icefield and terrestrial water storage in a sea-level rise context

Saved in:
Bibliographic Details
Title: Evolution of glacial lakes from the Northern Patagonia Icefield and terrestrial water storage in a sea-level rise context
Authors: Loriaux, Thomas thomas@cecs.cl, Casassa, Gino
Source: Global & Planetary Change. Mar2013, Vol. 102, p33-40. 8p.
Subjects: Glacial lakes, Ice fields, Water storage, Absolute sea level change, Landsat satellites, Floods
Geographic Terms: Patagonia (Argentina & Chile), Argentina, Chile
Abstract: Abstract: An increase of glacial lake area of 66.0km2 has been measured at the periphery of the Northern Patagonia Icefield (NPI) between 1945 and 2011. Results have been obtained by digitizing the glacial lakes from Lliboutry''s topographic map and from various multitemporal Landsat satellite scenes (1976, 1987, 2001 and 2011). This first complete glacial lake inventory of the NPI indicates a total lake area of 167.5±8.4km2 for 2011, which represents an increase of 64.9% with respect to the total glacial lake area of the NPI in 1945 (101.6±19.1km2). The highest area increase was experienced by the San Quintín Lake with an expansion of 18.0km2 in the 1945–2011 period. Using a volume–area scaling model, a total volume increase of 4.8km3 is estimated for the entire glacial lake population in the 66-year period. Based on the volumetric increase of the glacial lakes we compute a terrestrial water storage factor of 10% of the contribution of NPI to sea-level rise for the last decade (2001–2011), which is considered as a lower bound since lakes that have lost contact with the ice are not considered in the inventory. The increasing risk of Glacial Lake Outburst Floods (GLOF''s) due to the glacial lake enlargement is also discussed. [Copyright &y& Elsevier]
Copyright of Global & Planetary Change is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Abstract: An increase of glacial lake area of 66.0km2 has been measured at the periphery of the Northern Patagonia Icefield (NPI) between 1945 and 2011. Results have been obtained by digitizing the glacial lakes from Lliboutry''s topographic map and from various multitemporal Landsat satellite scenes (1976, 1987, 2001 and 2011). This first complete glacial lake inventory of the NPI indicates a total lake area of 167.5±8.4km2 for 2011, which represents an increase of 64.9% with respect to the total glacial lake area of the NPI in 1945 (101.6±19.1km2). The highest area increase was experienced by the San Quintín Lake with an expansion of 18.0km2 in the 1945–2011 period. Using a volume–area scaling model, a total volume increase of 4.8km3 is estimated for the entire glacial lake population in the 66-year period. Based on the volumetric increase of the glacial lakes we compute a terrestrial water storage factor of 10% of the contribution of NPI to sea-level rise for the last decade (2001–2011), which is considered as a lower bound since lakes that have lost contact with the ice are not considered in the inventory. The increasing risk of Glacial Lake Outburst Floods (GLOF''s) due to the glacial lake enlargement is also discussed. [Copyright &y& Elsevier]
ISSN:09218181
DOI:10.1016/j.gloplacha.2012.12.012