The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE)
We present PATICE, a GIS database of Patagonian glacial geomorphology and recalibrated chronological data. PATICE includes 58,823 landforms and 1,669 geochronological ages, and extends from 38°S to 55°S in southern South America. We use these data to generate new empirical reconstructions of the Pat...
Published in: | Earth-Science Reviews |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2020
|
Subjects: | |
Online Access: | http://eprints.gla.ac.uk/211914/ http://eprints.gla.ac.uk/211914/7/211914.pdf |
id |
ftuglasgow:oai:eprints.gla.ac.uk:211914 |
---|---|
record_format |
openpolar |
spelling |
ftuglasgow:oai:eprints.gla.ac.uk:211914 2023-05-15T13:54:57+02:00 The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE) Davies, Bethan J. Darvill, Christopher M. Lovell, Harold Bendle, Jacob M. Dowdeswell, Julian A. Fabel, Derek García, Juan-Luis Geiger, Alessa Glasser, Neil F. Gheorghiu, Delia M. Harrison, Stephen Hein, Andrew S. Kaplan, Michael R. Martin, Julian R.V. Mendelova, Monika Palmer, Adrian Pelto, Mauri Rodés, Ángel Sagredo, Esteban A. Smedley, Rachel Smellie, John L. Thordycraft, Varyl R. 2020-05 text http://eprints.gla.ac.uk/211914/ http://eprints.gla.ac.uk/211914/7/211914.pdf en eng Elsevier http://eprints.gla.ac.uk/211914/7/211914.pdf Davies, B. J. et al. (2020) The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE). Earth Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Earth_Science_Reviews.html>, 204, 103152. (doi:10.1016/j.earscirev.2020.103152 <http://dx.doi.org/10.1016/j.earscirev.2020.103152>) cc_by_4 CC-BY GB Physical geography QE Geology Articles PeerReviewed 2020 ftuglasgow https://doi.org/10.1016/j.earscirev.2020.103152 2020-06-11T22:09:38Z We present PATICE, a GIS database of Patagonian glacial geomorphology and recalibrated chronological data. PATICE includes 58,823 landforms and 1,669 geochronological ages, and extends from 38°S to 55°S in southern South America. We use these data to generate new empirical reconstructions of the Patagonian Ice Sheet (PIS) and subsequent ice masses and ice-dammed palaeolakes at 35 ka, 30 ka, 25 ka, 20 ka, 15 ka, 13 ka (synchronous with the Antarctic Cold Reversal), 10 ka, 5 ka, 0.2 ka and 2011 AD. At 35 ka, the PIS covered of 492.6 x103 km2, had a sea level equivalent of ~1,496 mm, was 350 km wide and 2090 km long, and was grounded on the Pacific continental shelf edge. Outlet glacier lobes remained topographically confined and the largest generated the suites of subglacial streamlined bedforms characteristic of ice streams. The PIS reached its maximum extent by 33 – 28 ka from 38°S to 48°S, and earlier, around 47 ka from 48°S southwards. Net retreat from maximum positions began by 25 ka, with ice-marginal stabilisation then at 21 – 18 ka, which was then followed by rapid, irreversible deglaciation. By 15 ka, the PIS had separated into disparate ice masses, draining into large ice-dammed lakes along the eastern margin, which strongly influenced rates of recession. Glacial readvances or stabilisations occurred at least at 14 – 13 ka, 11 ka, 6 – 5 ka, 2 – 1 ka, and 0.5 – 0.2 ka. We suggest that 20th century glacial recession (% a-1) is occurring faster than at any time documented during the Holocene. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet University of Glasgow: Enlighten - Publications Antarctic Pacific The Antarctic Earth-Science Reviews 204 103152 |
institution |
Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
topic |
GB Physical geography QE Geology |
spellingShingle |
GB Physical geography QE Geology Davies, Bethan J. Darvill, Christopher M. Lovell, Harold Bendle, Jacob M. Dowdeswell, Julian A. Fabel, Derek García, Juan-Luis Geiger, Alessa Glasser, Neil F. Gheorghiu, Delia M. Harrison, Stephen Hein, Andrew S. Kaplan, Michael R. Martin, Julian R.V. Mendelova, Monika Palmer, Adrian Pelto, Mauri Rodés, Ángel Sagredo, Esteban A. Smedley, Rachel Smellie, John L. Thordycraft, Varyl R. The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE) |
topic_facet |
GB Physical geography QE Geology |
description |
We present PATICE, a GIS database of Patagonian glacial geomorphology and recalibrated chronological data. PATICE includes 58,823 landforms and 1,669 geochronological ages, and extends from 38°S to 55°S in southern South America. We use these data to generate new empirical reconstructions of the Patagonian Ice Sheet (PIS) and subsequent ice masses and ice-dammed palaeolakes at 35 ka, 30 ka, 25 ka, 20 ka, 15 ka, 13 ka (synchronous with the Antarctic Cold Reversal), 10 ka, 5 ka, 0.2 ka and 2011 AD. At 35 ka, the PIS covered of 492.6 x103 km2, had a sea level equivalent of ~1,496 mm, was 350 km wide and 2090 km long, and was grounded on the Pacific continental shelf edge. Outlet glacier lobes remained topographically confined and the largest generated the suites of subglacial streamlined bedforms characteristic of ice streams. The PIS reached its maximum extent by 33 – 28 ka from 38°S to 48°S, and earlier, around 47 ka from 48°S southwards. Net retreat from maximum positions began by 25 ka, with ice-marginal stabilisation then at 21 – 18 ka, which was then followed by rapid, irreversible deglaciation. By 15 ka, the PIS had separated into disparate ice masses, draining into large ice-dammed lakes along the eastern margin, which strongly influenced rates of recession. Glacial readvances or stabilisations occurred at least at 14 – 13 ka, 11 ka, 6 – 5 ka, 2 – 1 ka, and 0.5 – 0.2 ka. We suggest that 20th century glacial recession (% a-1) is occurring faster than at any time documented during the Holocene. |
format |
Article in Journal/Newspaper |
author |
Davies, Bethan J. Darvill, Christopher M. Lovell, Harold Bendle, Jacob M. Dowdeswell, Julian A. Fabel, Derek García, Juan-Luis Geiger, Alessa Glasser, Neil F. Gheorghiu, Delia M. Harrison, Stephen Hein, Andrew S. Kaplan, Michael R. Martin, Julian R.V. Mendelova, Monika Palmer, Adrian Pelto, Mauri Rodés, Ángel Sagredo, Esteban A. Smedley, Rachel Smellie, John L. Thordycraft, Varyl R. |
author_facet |
Davies, Bethan J. Darvill, Christopher M. Lovell, Harold Bendle, Jacob M. Dowdeswell, Julian A. Fabel, Derek García, Juan-Luis Geiger, Alessa Glasser, Neil F. Gheorghiu, Delia M. Harrison, Stephen Hein, Andrew S. Kaplan, Michael R. Martin, Julian R.V. Mendelova, Monika Palmer, Adrian Pelto, Mauri Rodés, Ángel Sagredo, Esteban A. Smedley, Rachel Smellie, John L. Thordycraft, Varyl R. |
author_sort |
Davies, Bethan J. |
title |
The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE) |
title_short |
The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE) |
title_full |
The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE) |
title_fullStr |
The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE) |
title_full_unstemmed |
The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE) |
title_sort |
evolution of the patagonian ice sheet from 35 ka to the present day (patice) |
publisher |
Elsevier |
publishDate |
2020 |
url |
http://eprints.gla.ac.uk/211914/ http://eprints.gla.ac.uk/211914/7/211914.pdf |
geographic |
Antarctic Pacific The Antarctic |
geographic_facet |
Antarctic Pacific The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
http://eprints.gla.ac.uk/211914/7/211914.pdf Davies, B. J. et al. (2020) The evolution of the Patagonian Ice Sheet from 35 ka to the present day (PATICE). Earth Science Reviews <http://eprints.gla.ac.uk/view/journal_volume/Earth_Science_Reviews.html>, 204, 103152. (doi:10.1016/j.earscirev.2020.103152 <http://dx.doi.org/10.1016/j.earscirev.2020.103152>) |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.earscirev.2020.103152 |
container_title |
Earth-Science Reviews |
container_volume |
204 |
container_start_page |
103152 |
_version_ |
1766261152710393856 |