Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield
In contrast to the general trend for glaciers of the Southern Patagonia Icefield, Glaciar Pio XI has experienced a large cumulative frontal advance since 1945. In an effort to better understand this advancing behaviour, this paper presents a synoptic analysis of frontal fluctuations (1998–2014), ice...
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ftdoajarticles:oai:doaj.org/article:8bf1f5baa84f4b3bb1f7296065a2c3e9 2023-05-15T13:29:31+02:00 Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield Ryan Wilson Daniela Carrión Andrés Rivera 2016-09-01T00:00:00Z https://doi.org/10.1017/aog.2016.32 https://doaj.org/article/8bf1f5baa84f4b3bb1f7296065a2c3e9 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S026030551600032X/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2016.32 0260-3055 1727-5644 https://doaj.org/article/8bf1f5baa84f4b3bb1f7296065a2c3e9 Annals of Glaciology, Vol 57, Pp 119-130 (2016) frontal advance ice thickening ice velocity remote sensing surge-type glacier Meteorology. Climatology QC851-999 article 2016 ftdoajarticles https://doi.org/10.1017/aog.2016.32 2023-03-12T01:31:57Z In contrast to the general trend for glaciers of the Southern Patagonia Icefield, Glaciar Pio XI has experienced a large cumulative frontal advance since 1945. In an effort to better understand this advancing behaviour, this paper presents a synoptic analysis of frontal fluctuations (1998–2014), ice velocities (1986–2014), ice-surface elevations (1975–2007) and supraglacial moraines (1945–2014) derived from geospatial datasets. These analyses reveal changes in the ice flow of Glaciar Pio XI's freshwater calving northern terminus and tidewater calving southern terminus over recent decades. Between 1986 and 2000, ice flow speed generally accelerated reaching peaks of >15 m d−1 at the frontal edge of the southern terminus. Following this period, flow speed decreased, reducing to <1 m d−1 for the central part of the southern terminus in 2014, despite advancing to a neoglacial maximum. From 2000 to 2014 the reduction in speed was accompanied by a shift in maximum velocity away from the southern terminus, towards the central glacier trunk. As a result, the northern terminus, which accelerated during this period, represented the new primary flow path in 2014. Notably, the moraine maps presented highlight surges occurring around 1981 and again between 1997 and 2000, marked by arcuate moraine features on the southern terminus. Article in Journal/Newspaper Annals of Glaciology Tidewater Directory of Open Access Journals: DOAJ Articles Patagonia Annals of Glaciology 57 73 119 130 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
frontal advance ice thickening ice velocity remote sensing surge-type glacier Meteorology. Climatology QC851-999 |
spellingShingle |
frontal advance ice thickening ice velocity remote sensing surge-type glacier Meteorology. Climatology QC851-999 Ryan Wilson Daniela Carrión Andrés Rivera Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield |
topic_facet |
frontal advance ice thickening ice velocity remote sensing surge-type glacier Meteorology. Climatology QC851-999 |
description |
In contrast to the general trend for glaciers of the Southern Patagonia Icefield, Glaciar Pio XI has experienced a large cumulative frontal advance since 1945. In an effort to better understand this advancing behaviour, this paper presents a synoptic analysis of frontal fluctuations (1998–2014), ice velocities (1986–2014), ice-surface elevations (1975–2007) and supraglacial moraines (1945–2014) derived from geospatial datasets. These analyses reveal changes in the ice flow of Glaciar Pio XI's freshwater calving northern terminus and tidewater calving southern terminus over recent decades. Between 1986 and 2000, ice flow speed generally accelerated reaching peaks of >15 m d−1 at the frontal edge of the southern terminus. Following this period, flow speed decreased, reducing to <1 m d−1 for the central part of the southern terminus in 2014, despite advancing to a neoglacial maximum. From 2000 to 2014 the reduction in speed was accompanied by a shift in maximum velocity away from the southern terminus, towards the central glacier trunk. As a result, the northern terminus, which accelerated during this period, represented the new primary flow path in 2014. Notably, the moraine maps presented highlight surges occurring around 1981 and again between 1997 and 2000, marked by arcuate moraine features on the southern terminus. |
format |
Article in Journal/Newspaper |
author |
Ryan Wilson Daniela Carrión Andrés Rivera |
author_facet |
Ryan Wilson Daniela Carrión Andrés Rivera |
author_sort |
Ryan Wilson |
title |
Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield |
title_short |
Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield |
title_full |
Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield |
title_fullStr |
Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield |
title_full_unstemmed |
Detailed dynamic, geometric and supraglacial moraine data for Glaciar Pio XI, the only surge-type glacier of the Southern Patagonia Icefield |
title_sort |
detailed dynamic, geometric and supraglacial moraine data for glaciar pio xi, the only surge-type glacier of the southern patagonia icefield |
publisher |
Cambridge University Press |
publishDate |
2016 |
url |
https://doi.org/10.1017/aog.2016.32 https://doaj.org/article/8bf1f5baa84f4b3bb1f7296065a2c3e9 |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
Annals of Glaciology Tidewater |
genre_facet |
Annals of Glaciology Tidewater |
op_source |
Annals of Glaciology, Vol 57, Pp 119-130 (2016) |
op_relation |
https://www.cambridge.org/core/product/identifier/S026030551600032X/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2016.32 0260-3055 1727-5644 https://doaj.org/article/8bf1f5baa84f4b3bb1f7296065a2c3e9 |
op_doi |
https://doi.org/10.1017/aog.2016.32 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
73 |
container_start_page |
119 |
op_container_end_page |
130 |
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1766001010471337984 |