Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica
Although over 600 Antarctic subglacial lakes have been identified using radar and satellite observations, the bathymetry and bed properties, which are key to understanding conditions within the lake, have been determined in very few localities. We present measurements of water column thickness and l...
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ftdoajarticles:oai:doaj.org/article:63a294a098fc412c973e9c1b7ff573e5 2023-07-23T04:15:08+02:00 Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica A. M. Brisbourne A. M. Smith A. Rivera R. Zamora F. Napoleoni J. A. Uribe M. Ortega https://doi.org/10.1017/jog.2023.38 https://doaj.org/article/63a294a098fc412c973e9c1b7ff573e5 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143023000382/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.38 0022-1430 1727-5652 https://doaj.org/article/63a294a098fc412c973e9c1b7ff573e5 Journal of Glaciology, Pp 1-10 Antarctic glaciology glacier hydrology seismics subglacial lakes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/jog.2023.38 2023-07-02T00:35:18Z Although over 600 Antarctic subglacial lakes have been identified using radar and satellite observations, the bathymetry and bed properties, which are key to understanding conditions within the lake, have been determined in very few localities. We present measurements of water column thickness and lakebed properties from Lago Subglacial CECs (SLC), located beneath 2653 m of ice at the Rutford-Institute-Minnesota divide in Antarctica. Seismic profiles indicate a maximum water column thickness of 301.3 ± 1.5 m, at the widest part of the lake, with an estimated lake volume of 2.5 ± 0.3 km3. Seismic imaging and measurements of the reflection strength at the ice base and lakebed indicate >15 m of high-porosity fine-grained sediment in the central section of the lakebed, consistent with a depositional sequence with an age of up to 0.5 Ma. These observations, along with previous radar measurements and modelling, indicate a low-energy sedimentary environment with a long water-residence time. As such, SLC is a suitable target for exploration via direct access to recover sediment records of ice sheet and climate history and investigate microbial life with long periods of isolation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology West Antarctica Directory of Open Access Journals: DOAJ Articles Antarctic Lago subglacial CECs ENVELOPE(-87.583,-87.583,-79.242,-79.242) Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) West Antarctica Journal of Glaciology 1 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology glacier hydrology seismics subglacial lakes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology glacier hydrology seismics subglacial lakes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 A. M. Brisbourne A. M. Smith A. Rivera R. Zamora F. Napoleoni J. A. Uribe M. Ortega Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica |
topic_facet |
Antarctic glaciology glacier hydrology seismics subglacial lakes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Although over 600 Antarctic subglacial lakes have been identified using radar and satellite observations, the bathymetry and bed properties, which are key to understanding conditions within the lake, have been determined in very few localities. We present measurements of water column thickness and lakebed properties from Lago Subglacial CECs (SLC), located beneath 2653 m of ice at the Rutford-Institute-Minnesota divide in Antarctica. Seismic profiles indicate a maximum water column thickness of 301.3 ± 1.5 m, at the widest part of the lake, with an estimated lake volume of 2.5 ± 0.3 km3. Seismic imaging and measurements of the reflection strength at the ice base and lakebed indicate >15 m of high-porosity fine-grained sediment in the central section of the lakebed, consistent with a depositional sequence with an age of up to 0.5 Ma. These observations, along with previous radar measurements and modelling, indicate a low-energy sedimentary environment with a long water-residence time. As such, SLC is a suitable target for exploration via direct access to recover sediment records of ice sheet and climate history and investigate microbial life with long periods of isolation. |
format |
Article in Journal/Newspaper |
author |
A. M. Brisbourne A. M. Smith A. Rivera R. Zamora F. Napoleoni J. A. Uribe M. Ortega |
author_facet |
A. M. Brisbourne A. M. Smith A. Rivera R. Zamora F. Napoleoni J. A. Uribe M. Ortega |
author_sort |
A. M. Brisbourne |
title |
Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica |
title_short |
Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica |
title_full |
Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica |
title_fullStr |
Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica |
title_full_unstemmed |
Bathymetry and bed conditions of Lago Subglacial CECs, West Antarctica |
title_sort |
bathymetry and bed conditions of lago subglacial cecs, west antarctica |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/jog.2023.38 https://doaj.org/article/63a294a098fc412c973e9c1b7ff573e5 |
long_lat |
ENVELOPE(-87.583,-87.583,-79.242,-79.242) ENVELOPE(-85.300,-85.300,-78.600,-78.600) |
geographic |
Antarctic Lago subglacial CECs Rutford West Antarctica |
geographic_facet |
Antarctic Lago subglacial CECs Rutford West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology West Antarctica |
op_source |
Journal of Glaciology, Pp 1-10 |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143023000382/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.38 0022-1430 1727-5652 https://doaj.org/article/63a294a098fc412c973e9c1b7ff573e5 |
op_doi |
https://doi.org/10.1017/jog.2023.38 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
10 |
_version_ |
1772189136241819648 |