Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015
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...
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Cambridge University Press
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Online Access: | https://doi.org/10.1017/jog.2016.73 https://doaj.org/article/7a65dc73fafd4022aacf5d41f5d70aa8 |
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ftdoajarticles:oai:doaj.org/article:7a65dc73fafd4022aacf5d41f5d70aa8 2023-05-15T16:57:36+02:00 Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015 RYAN WILSON SEBASTIAN H. MERNILD JEPPE K. MALMROS CLAUDIO BRAVO DANIELA CARRIÓN 2016-10-01T00:00:00Z https://doi.org/10.1017/jog.2016.73 https://doaj.org/article/7a65dc73fafd4022aacf5d41f5d70aa8 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143016000733/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2016.73 0022-1430 1727-5652 https://doaj.org/article/7a65dc73fafd4022aacf5d41f5d70aa8 Journal of Glaciology, Vol 62, Pp 847-860 (2016) climate change glacier mapping ice velocity mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2016 ftdoajarticles https://doi.org/10.1017/jog.2016.73 2023-03-12T01:30:59Z 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. Article in Journal/Newspaper Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Patagonia Journal of Glaciology 62 235 847 860 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
climate change glacier mapping ice velocity mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
climate change glacier mapping ice velocity mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 RYAN WILSON SEBASTIAN H. MERNILD JEPPE K. MALMROS CLAUDIO BRAVO DANIELA CARRIÓN Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015 |
topic_facet |
climate change glacier mapping ice velocity mountain glaciers remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
RYAN WILSON SEBASTIAN H. MERNILD JEPPE K. MALMROS CLAUDIO BRAVO DANIELA CARRIÓN |
author_facet |
RYAN WILSON SEBASTIAN H. MERNILD JEPPE K. MALMROS CLAUDIO BRAVO DANIELA CARRIÓN |
author_sort |
RYAN WILSON |
title |
Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015 |
title_short |
Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015 |
title_full |
Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015 |
title_fullStr |
Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015 |
title_full_unstemmed |
Surface velocity fluctuations for Glaciar Universidad, central Chile, between 1967 and 2015 |
title_sort |
surface velocity fluctuations for glaciar universidad, central chile, between 1967 and 2015 |
publisher |
Cambridge University Press |
publishDate |
2016 |
url |
https://doi.org/10.1017/jog.2016.73 https://doaj.org/article/7a65dc73fafd4022aacf5d41f5d70aa8 |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 62, Pp 847-860 (2016) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143016000733/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2016.73 0022-1430 1727-5652 https://doaj.org/article/7a65dc73fafd4022aacf5d41f5d70aa8 |
op_doi |
https://doi.org/10.1017/jog.2016.73 |
container_title |
Journal of Glaciology |
container_volume |
62 |
container_issue |
235 |
container_start_page |
847 |
op_container_end_page |
860 |
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1766049167284633600 |