Geodetic Mass Balances and Area Changes of Echaurren Norte Glacier (Central Andes, Chile) between 1955 and 2015

Détails

Ressource 1Télécharger: remotesensing-11-00260.pdf (8066.44 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_A3C4A644236A
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Geodetic Mass Balances and Area Changes of Echaurren Norte Glacier (Central Andes, Chile) between 1955 and 2015
Périodique
Remote Sensing
Auteur(s)
Farías-Barahona David, Vivero Sebastián, Casassa Gino, Schaefer Marius, Burger Flavia, Seehaus Thorsten, Iribarren-Anacona Pablo, Escobar Fernando, Braun Matthias
ISSN
2072-4292
Statut éditorial
Publié
Date de publication
28/01/2019
Peer-reviewed
Oui
Volume
11
Numéro
3
Pages
260
Langue
anglais
Résumé
The Echaurren Norte Glacier is a reference glacier for the World Glacier Monitoring Service (WGMS) network and has the longest time series of glacier mass balance data in the Southern Hemisphere. The data has been obtained by the direct glaciological method since 1975. In this study, we calculated glacier area changes using satellite images and historical aerial photographs, as well as geodetic mass balances for different periods between 1955 and 2015 for the Echaurren Norte Glacier in the Central Andes of Chile. Over this period, this glacier lost 65% of its original area and disaggregated into two ice bodies in the late 1990s. The geodetic mass balances were calculated by differencing digital elevation models derived from several sources. The results indicated a mean cumulative glacier wide mass loss of −40.64 ± 5.19 m w.e. (−0.68 ± 0.09 m w.e. a−1). Within this overall downwasting trend, a positive mass balance of 0.54 ± 0.40 m w.e. a−1 was detected for the period 2000–2009. These estimates agree with the results obtained with the glaciological method during the same time span. Highly negative mass change rates were found from 2010 onwards, with −1.20 ± 0.09 m w.e. a−1 during an unprecedented drought in Central Andes of Chile. The observed area and the elevation changes indicate that the Echaurren Norte Glacier may disappear in the coming years if negative mass balance rates prevail.
Mots-clé
General Earth and Planetary Sciences
Open Access
Oui
Création de la notice
30/01/2019 10:55
Dernière modification de la notice
24/05/2020 15:08
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