Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas
International audience The Antarctic Peninsula is one of the world's most rapidly warming regions; over the last hundred years, glaciers have retreated, exposing new rocky areas to physical weathering. In its northernmost part, the Trinity Peninsula, physical weathering processes on exposed bed...
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ftinsu:oai:HAL:insu-03863526v1 2023-12-17T10:22:00+01:00 Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas Ruiz-Pereira, S. Beriain, E. Cabré, A. Cid-Agüero, P. Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) 2022 https://insu.hal.science/insu-03863526 https://doi.org/10.1016/j.jsames.2022.103913 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2022.103913 insu-03863526 https://insu.hal.science/insu-03863526 BIBCODE: 2022JSAES.11803913R doi:10.1016/j.jsames.2022.103913 ISSN: 0895-9811 EISSN: 1873-0647 Journal of South American Earth Sciences https://insu.hal.science/insu-03863526 Journal of South American Earth Sciences, 2022, 118, ⟨10.1016/j.jsames.2022.103913⟩ Düse bay Antarctic peninsula Frozen grounds Deglaciation Thermal weathering [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2022 ftinsu https://doi.org/10.1016/j.jsames.2022.103913 2023-11-22T17:29:29Z International audience The Antarctic Peninsula is one of the world's most rapidly warming regions; over the last hundred years, glaciers have retreated, exposing new rocky areas to physical weathering. In its northernmost part, the Trinity Peninsula, physical weathering processes on exposed bedrock between west and east coasts may not be at the same weathering stage as surface temperature conditions are assumed historically different. Thus, we examined rock outcrops in ice-free coasts, assessed surface temperature conditions, rock fracturing degree from rock samples, and analyzed the local context for permafrost occurrence. The survey through Trinity Peninsula covered a transect over three ice-free locations between Cape Legoupil and Düse Bay (63°30'S). Our findings support that ice-free-bedrock surfaces at both coasts of the Trinity Peninsula are at an early weathering stage under equivalent air temperature and wind speed conditions over the last decades. Temperature analysis indicated that if surface temperatures sustain its 2015-2016 magnitude, the permafrost distribution will likely become sporadic. Findings indicate that the physical weathering rates should have been significantly slower or have remained ice-covered much longer than in other areas of the Antarctic Peninsula. Nevertheless, a sustained surface warming will elicit higher physical weathering rates beyond the initial stage attested. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice permafrost Institut national des sciences de l'Univers: HAL-INSU Antarctic Antarctic Peninsula Cape Legoupil ENVELOPE(-57.917,-57.917,-63.333,-63.333) Legoupil ENVELOPE(-57.885,-57.885,-63.315,-63.315) The Antarctic Trinity Peninsula ENVELOPE(-58.000,-58.000,-63.500,-63.500) Journal of South American Earth Sciences 118 103913 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Düse bay Antarctic peninsula Frozen grounds Deglaciation Thermal weathering [SDU]Sciences of the Universe [physics] |
spellingShingle |
Düse bay Antarctic peninsula Frozen grounds Deglaciation Thermal weathering [SDU]Sciences of the Universe [physics] Ruiz-Pereira, S. Beriain, E. Cabré, A. Cid-Agüero, P. Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas |
topic_facet |
Düse bay Antarctic peninsula Frozen grounds Deglaciation Thermal weathering [SDU]Sciences of the Universe [physics] |
description |
International audience The Antarctic Peninsula is one of the world's most rapidly warming regions; over the last hundred years, glaciers have retreated, exposing new rocky areas to physical weathering. In its northernmost part, the Trinity Peninsula, physical weathering processes on exposed bedrock between west and east coasts may not be at the same weathering stage as surface temperature conditions are assumed historically different. Thus, we examined rock outcrops in ice-free coasts, assessed surface temperature conditions, rock fracturing degree from rock samples, and analyzed the local context for permafrost occurrence. The survey through Trinity Peninsula covered a transect over three ice-free locations between Cape Legoupil and Düse Bay (63°30'S). Our findings support that ice-free-bedrock surfaces at both coasts of the Trinity Peninsula are at an early weathering stage under equivalent air temperature and wind speed conditions over the last decades. Temperature analysis indicated that if surface temperatures sustain its 2015-2016 magnitude, the permafrost distribution will likely become sporadic. Findings indicate that the physical weathering rates should have been significantly slower or have remained ice-covered much longer than in other areas of the Antarctic Peninsula. Nevertheless, a sustained surface warming will elicit higher physical weathering rates beyond the initial stage attested. |
author2 |
Géosciences Environnement Toulouse (GET) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Ruiz-Pereira, S. Beriain, E. Cabré, A. Cid-Agüero, P. |
author_facet |
Ruiz-Pereira, S. Beriain, E. Cabré, A. Cid-Agüero, P. |
author_sort |
Ruiz-Pereira, S. |
title |
Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas |
title_short |
Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas |
title_full |
Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas |
title_fullStr |
Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas |
title_full_unstemmed |
Assessment of physical weathering in bedrock areas at the Trinity Peninsula, Antarctica: Towards a classification of the current weathering grade in polar areas |
title_sort |
assessment of physical weathering in bedrock areas at the trinity peninsula, antarctica: towards a classification of the current weathering grade in polar areas |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03863526 https://doi.org/10.1016/j.jsames.2022.103913 |
long_lat |
ENVELOPE(-57.917,-57.917,-63.333,-63.333) ENVELOPE(-57.885,-57.885,-63.315,-63.315) ENVELOPE(-58.000,-58.000,-63.500,-63.500) |
geographic |
Antarctic Antarctic Peninsula Cape Legoupil Legoupil The Antarctic Trinity Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula Cape Legoupil Legoupil The Antarctic Trinity Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice permafrost |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice permafrost |
op_source |
ISSN: 0895-9811 EISSN: 1873-0647 Journal of South American Earth Sciences https://insu.hal.science/insu-03863526 Journal of South American Earth Sciences, 2022, 118, ⟨10.1016/j.jsames.2022.103913⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2022.103913 insu-03863526 https://insu.hal.science/insu-03863526 BIBCODE: 2022JSAES.11803913R doi:10.1016/j.jsames.2022.103913 |
op_doi |
https://doi.org/10.1016/j.jsames.2022.103913 |
container_title |
Journal of South American Earth Sciences |
container_volume |
118 |
container_start_page |
103913 |
_version_ |
1785541872830119936 |