Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield
The Southern Patagonia Icefield (SPI) withdrawal in recent decades shows contrasting behaviours between adjacent basins. One of the basins with highest volumetric losses is located at northernmost SPI. We refer to Jorge Montt tidewater glacier (48° 30′S/73° 30′W, 445 km2 in 2018), which retreated 2....
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ftdoajarticles:oai:doaj.org/article:8ee10c3826274bef8a31baba94d159f1 2023-05-15T16:57:34+02:00 Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield Francisca Bown Andrés Rivera Michał Pętlicki Claudio Bravo Jonathan Oberreuter Carlos Moffat 2019-10-01T00:00:00Z https://doi.org/10.1017/jog.2019.47 https://doaj.org/article/8ee10c3826274bef8a31baba94d159f1 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143019000479/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.47 0022-1430 1727-5652 https://doaj.org/article/8ee10c3826274bef8a31baba94d159f1 Journal of Glaciology, Vol 65, Pp 732-744 (2019) Glacier calving glacier mass balance ice velocity Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2019 ftdoajarticles https://doi.org/10.1017/jog.2019.47 2023-03-12T01:30:57Z The Southern Patagonia Icefield (SPI) withdrawal in recent decades shows contrasting behaviours between adjacent basins. One of the basins with highest volumetric losses is located at northernmost SPI. We refer to Jorge Montt tidewater glacier (48° 30′S/73° 30′W, 445 km2 in 2018), which retreated 2.7 km between 2011 and 2018 and thinned at rates of up to 21 m a−1 over this period. Based on the retreat record, remote-sensing imagery, field data, a mass-balance model and a calving parameterisation, we attempted to differentiate climatic-induced changes (i.e. surface mass balance) and dynamic responses (i.e. calving fluxes). The surface mass balance reached −4.15 km3 w.e. a−1 between 2012 and 2017. When frontal ablation is included, the net mass balance is −17.79 km3 w.e. a−1. This represents a change of trend compared with modelling estimations of positive surface mass balance prior to 2010. This shift is attributed to higher ablation rates given that accumulation is known to have increased between 1980 and 2015. The available evidence, therefore, indicates that frontal ablation is the main factor, supported by observed rates at Jorge Montt as high as 3.81 km3 w.e. a−1 in 2015, with ice velocities peaking at 11 km a−1. Article in Journal/Newspaper Journal of Glaciology Tidewater Directory of Open Access Journals: DOAJ Articles Patagonia Journal of Glaciology 65 253 732 744 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Glacier calving glacier mass balance ice velocity Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Glacier calving glacier mass balance ice velocity Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Francisca Bown Andrés Rivera Michał Pętlicki Claudio Bravo Jonathan Oberreuter Carlos Moffat Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield |
topic_facet |
Glacier calving glacier mass balance ice velocity Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
The Southern Patagonia Icefield (SPI) withdrawal in recent decades shows contrasting behaviours between adjacent basins. One of the basins with highest volumetric losses is located at northernmost SPI. We refer to Jorge Montt tidewater glacier (48° 30′S/73° 30′W, 445 km2 in 2018), which retreated 2.7 km between 2011 and 2018 and thinned at rates of up to 21 m a−1 over this period. Based on the retreat record, remote-sensing imagery, field data, a mass-balance model and a calving parameterisation, we attempted to differentiate climatic-induced changes (i.e. surface mass balance) and dynamic responses (i.e. calving fluxes). The surface mass balance reached −4.15 km3 w.e. a−1 between 2012 and 2017. When frontal ablation is included, the net mass balance is −17.79 km3 w.e. a−1. This represents a change of trend compared with modelling estimations of positive surface mass balance prior to 2010. This shift is attributed to higher ablation rates given that accumulation is known to have increased between 1980 and 2015. The available evidence, therefore, indicates that frontal ablation is the main factor, supported by observed rates at Jorge Montt as high as 3.81 km3 w.e. a−1 in 2015, with ice velocities peaking at 11 km a−1. |
format |
Article in Journal/Newspaper |
author |
Francisca Bown Andrés Rivera Michał Pętlicki Claudio Bravo Jonathan Oberreuter Carlos Moffat |
author_facet |
Francisca Bown Andrés Rivera Michał Pętlicki Claudio Bravo Jonathan Oberreuter Carlos Moffat |
author_sort |
Francisca Bown |
title |
Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield |
title_short |
Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield |
title_full |
Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield |
title_fullStr |
Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield |
title_full_unstemmed |
Recent ice dynamics and mass balance of Jorge Montt Glacier, Southern Patagonia Icefield |
title_sort |
recent ice dynamics and mass balance of jorge montt glacier, southern patagonia icefield |
publisher |
Cambridge University Press |
publishDate |
2019 |
url |
https://doi.org/10.1017/jog.2019.47 https://doaj.org/article/8ee10c3826274bef8a31baba94d159f1 |
geographic |
Patagonia |
geographic_facet |
Patagonia |
genre |
Journal of Glaciology Tidewater |
genre_facet |
Journal of Glaciology Tidewater |
op_source |
Journal of Glaciology, Vol 65, Pp 732-744 (2019) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143019000479/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2019.47 0022-1430 1727-5652 https://doaj.org/article/8ee10c3826274bef8a31baba94d159f1 |
op_doi |
https://doi.org/10.1017/jog.2019.47 |
container_title |
Journal of Glaciology |
container_volume |
65 |
container_issue |
253 |
container_start_page |
732 |
op_container_end_page |
744 |
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1766049128354152448 |