Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015

Ryan Wilson, Sebastian H. Mernild, Jeppe K. Malmros, Claudio Bravo, Daniela Carrión

Research output: Contribution to journalReview article

9 Citations (Scopus)

Abstract

For the Andes Cordillera, where observed mass-balance records are sparse, long-term glacier velocity measurements potentially represent a useful tool for assessing glacier health. Utilising manual and automatic feature-tracking techniques applied to Corona, Landsat and ASTER satellite imagery, this paper presents surface velocity fluctuations for Glaciar Universidad between 1967 and 1969, and 1985 and 2015, the longest such time series available for the Andes Cordillera, outside Patagonia. This time series reveals an increase in the surface velocities of the main glacier trunk between 1967 and 1987 (∼90%) followed by a deceleration between 1987 and 2015 (∼80%), with ice velocities observed between 2014 and 2015 possibly representing a 48 a low. In response to the surface velocity fluctuations, the glacier front advanced between 1985 and 1992 (cumulative change of 137 � 14 m), and again to a lesser magnitude during the 1996-98 and 2004-08 periods. Although having exhibited possible surge behaviour during the 1940s, the synchrony of the glacier changes presented for Glaciar Universidad with those reported for nearby glaciers, suggests that this glacier is responding to climatic trends. If the above scenario is true, the results indicate a general pattern of increasingly negative glacier mass-balance conditions since the late 1980s.

Original languageEnglish
Pages (from-to)847-860
Number of pages14
JournalJournal of Glaciology
Volume62
Issue number235
DOIs
Publication statusPublished - 1 Oct 2016
Externally publishedYes

Fingerprint

glacier
cordillera
time series
glacier mass balance
ASTER
synchrony
satellite imagery
Landsat
corona
mass balance
ice

Cite this

Wilson, Ryan ; Mernild, Sebastian H. ; Malmros, Jeppe K. ; Bravo, Claudio ; Carrión, Daniela. / Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015. In: Journal of Glaciology. 2016 ; Vol. 62, No. 235. pp. 847-860.
@article{e1b970f6027b4d82ac6fdc4406992c3d,
title = "Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015",
abstract = "For the Andes Cordillera, where observed mass-balance records are sparse, long-term glacier velocity measurements potentially represent a useful tool for assessing glacier health. Utilising manual and automatic feature-tracking techniques applied to Corona, Landsat and ASTER satellite imagery, this paper presents surface velocity fluctuations for Glaciar Universidad between 1967 and 1969, and 1985 and 2015, the longest such time series available for the Andes Cordillera, outside Patagonia. This time series reveals an increase in the surface velocities of the main glacier trunk between 1967 and 1987 (∼90{\%}) followed by a deceleration between 1987 and 2015 (∼80{\%}), with ice velocities observed between 2014 and 2015 possibly representing a 48 a low. In response to the surface velocity fluctuations, the glacier front advanced between 1985 and 1992 (cumulative change of 137 {\"i}¿½ 14 m), and again to a lesser magnitude during the 1996-98 and 2004-08 periods. Although having exhibited possible surge behaviour during the 1940s, the synchrony of the glacier changes presented for Glaciar Universidad with those reported for nearby glaciers, suggests that this glacier is responding to climatic trends. If the above scenario is true, the results indicate a general pattern of increasingly negative glacier mass-balance conditions since the late 1980s.",
keywords = "Climate change, Glacier mapping, Ice velocity, Mountain glaciers, Remote sensing",
author = "Ryan Wilson and Mernild, {Sebastian H.} and Malmros, {Jeppe K.} and Claudio Bravo and Daniela Carri{\'o}n",
year = "2016",
month = "10",
day = "1",
doi = "10.1017/jog.2016.73",
language = "English",
volume = "62",
pages = "847--860",
journal = "Journal of Glaciology",
issn = "0022-1430",
publisher = "International Glaciology Society",
number = "235",

}

Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015. / Wilson, Ryan; Mernild, Sebastian H.; Malmros, Jeppe K.; Bravo, Claudio; Carrión, Daniela.

In: Journal of Glaciology, Vol. 62, No. 235, 01.10.2016, p. 847-860.

Research output: Contribution to journalReview article

TY - JOUR

T1 - Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015

AU - Wilson, Ryan

AU - Mernild, Sebastian H.

AU - Malmros, Jeppe K.

AU - Bravo, Claudio

AU - Carrión, Daniela

PY - 2016/10/1

Y1 - 2016/10/1

N2 - For the Andes Cordillera, where observed mass-balance records are sparse, long-term glacier velocity measurements potentially represent a useful tool for assessing glacier health. Utilising manual and automatic feature-tracking techniques applied to Corona, Landsat and ASTER satellite imagery, this paper presents surface velocity fluctuations for Glaciar Universidad between 1967 and 1969, and 1985 and 2015, the longest such time series available for the Andes Cordillera, outside Patagonia. This time series reveals an increase in the surface velocities of the main glacier trunk between 1967 and 1987 (∼90%) followed by a deceleration between 1987 and 2015 (∼80%), with ice velocities observed between 2014 and 2015 possibly representing a 48 a low. In response to the surface velocity fluctuations, the glacier front advanced between 1985 and 1992 (cumulative change of 137 � 14 m), and again to a lesser magnitude during the 1996-98 and 2004-08 periods. Although having exhibited possible surge behaviour during the 1940s, the synchrony of the glacier changes presented for Glaciar Universidad with those reported for nearby glaciers, suggests that this glacier is responding to climatic trends. If the above scenario is true, the results indicate a general pattern of increasingly negative glacier mass-balance conditions since the late 1980s.

AB - For the Andes Cordillera, where observed mass-balance records are sparse, long-term glacier velocity measurements potentially represent a useful tool for assessing glacier health. Utilising manual and automatic feature-tracking techniques applied to Corona, Landsat and ASTER satellite imagery, this paper presents surface velocity fluctuations for Glaciar Universidad between 1967 and 1969, and 1985 and 2015, the longest such time series available for the Andes Cordillera, outside Patagonia. This time series reveals an increase in the surface velocities of the main glacier trunk between 1967 and 1987 (∼90%) followed by a deceleration between 1987 and 2015 (∼80%), with ice velocities observed between 2014 and 2015 possibly representing a 48 a low. In response to the surface velocity fluctuations, the glacier front advanced between 1985 and 1992 (cumulative change of 137 � 14 m), and again to a lesser magnitude during the 1996-98 and 2004-08 periods. Although having exhibited possible surge behaviour during the 1940s, the synchrony of the glacier changes presented for Glaciar Universidad with those reported for nearby glaciers, suggests that this glacier is responding to climatic trends. If the above scenario is true, the results indicate a general pattern of increasingly negative glacier mass-balance conditions since the late 1980s.

KW - Climate change

KW - Glacier mapping

KW - Ice velocity

KW - Mountain glaciers

KW - Remote sensing

UR - http://www.scopus.com/inward/record.url?scp=84994641702&partnerID=8YFLogxK

U2 - 10.1017/jog.2016.73

DO - 10.1017/jog.2016.73

M3 - Review article

VL - 62

SP - 847

EP - 860

JO - Journal of Glaciology

JF - Journal of Glaciology

SN - 0022-1430

IS - 235

ER -