Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica)
Results of studying the bottom relief of a unique small reservoir (lake) located in the south of the Broknes peninsula, the oasis of the Larsemann Hills (East Antarctica) are presented. The first reliable depth measurements carried out in January 2022 demonstrated that within the shallow basin of the...
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ftdoajarticles:oai:doaj.org/article:467b2342e5964dc6a6188a52c70de934 2023-05-15T14:13:30+02:00 Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica) S. D. Grigorieva M. R. Kuznetsova M. V. Shitov G. V. Priakhina M. P. Kashkevich 2022-09-01T00:00:00Z https://doi.org/10.31857/S2076673422030139 https://doaj.org/article/467b2342e5964dc6a6188a52c70de934 RU rus Nauka https://ice-snow.igras.ru/jour/article/view/1032 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.31857/S2076673422030139 https://doaj.org/article/467b2342e5964dc6a6188a52c70de934 Лëд и снег, Vol 62, Iss 3, Pp 377-386 (2022) гидрологический режим ледниковые озёра озёрная котловина подводный рельеф полуостров брокнес холмы ларсеманн Science Q article 2022 ftdoajarticles https://doi.org/10.31857/S2076673422030139 2023-03-19T01:40:11Z Results of studying the bottom relief of a unique small reservoir (lake) located in the south of the Broknes peninsula, the oasis of the Larsemann Hills (East Antarctica) are presented. The first reliable depth measurements carried out in January 2022 demonstrated that within the shallow basin of the lake (average depth of 1 m or less) there are four narrow depressions (canyons) with a width of 5.5 m or less and a depth reaching 27.7m. Such a character of bottom relief has not been found before in any of the more than 150 known lakes of this oasis. To study this phenomenon, we performed fieldwork including hydrological observations, measurements of water temperature and mineralization at different horizons, high-precision bathymetric survey, and the underwater photography together with geological and geophysical investigations of the lake bank slope. A working hypothesis explaining the origin of such unusual bottom relief suggests a version of frost cracking that propagates along the fracture zone in the bedrock followed by the formation of cryoeluvium and the removal fine-grained particles (suffusion). Article in Journal/Newspaper Antarc* Antarctica East Antarctica Directory of Open Access Journals: DOAJ Articles Broknes ENVELOPE(76.346,76.346,-69.391,-69.391) East Antarctica Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) Reservoir Lake ENVELOPE(-100.990,-100.990,56.757,56.757) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
Russian |
topic |
гидрологический режим ледниковые озёра озёрная котловина подводный рельеф полуостров брокнес холмы ларсеманн Science Q |
spellingShingle |
гидрологический режим ледниковые озёра озёрная котловина подводный рельеф полуостров брокнес холмы ларсеманн Science Q S. D. Grigorieva M. R. Kuznetsova M. V. Shitov G. V. Priakhina M. P. Kashkevich Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica) |
topic_facet |
гидрологический режим ледниковые озёра озёрная котловина подводный рельеф полуостров брокнес холмы ларсеманн Science Q |
description |
Results of studying the bottom relief of a unique small reservoir (lake) located in the south of the Broknes peninsula, the oasis of the Larsemann Hills (East Antarctica) are presented. The first reliable depth measurements carried out in January 2022 demonstrated that within the shallow basin of the lake (average depth of 1 m or less) there are four narrow depressions (canyons) with a width of 5.5 m or less and a depth reaching 27.7m. Such a character of bottom relief has not been found before in any of the more than 150 known lakes of this oasis. To study this phenomenon, we performed fieldwork including hydrological observations, measurements of water temperature and mineralization at different horizons, high-precision bathymetric survey, and the underwater photography together with geological and geophysical investigations of the lake bank slope. A working hypothesis explaining the origin of such unusual bottom relief suggests a version of frost cracking that propagates along the fracture zone in the bedrock followed by the formation of cryoeluvium and the removal fine-grained particles (suffusion). |
format |
Article in Journal/Newspaper |
author |
S. D. Grigorieva M. R. Kuznetsova M. V. Shitov G. V. Priakhina M. P. Kashkevich |
author_facet |
S. D. Grigorieva M. R. Kuznetsova M. V. Shitov G. V. Priakhina M. P. Kashkevich |
author_sort |
S. D. Grigorieva |
title |
Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica) |
title_short |
Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica) |
title_full |
Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica) |
title_fullStr |
Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica) |
title_full_unstemmed |
Anomalous bottom topography of a small lake in the Larsemann Hills Oasis (East Antarctica) |
title_sort |
anomalous bottom topography of a small lake in the larsemann hills oasis (east antarctica) |
publisher |
Nauka |
publishDate |
2022 |
url |
https://doi.org/10.31857/S2076673422030139 https://doaj.org/article/467b2342e5964dc6a6188a52c70de934 |
long_lat |
ENVELOPE(76.346,76.346,-69.391,-69.391) ENVELOPE(76.217,76.217,-69.400,-69.400) ENVELOPE(-100.990,-100.990,56.757,56.757) |
geographic |
Broknes East Antarctica Larsemann Hills Reservoir Lake |
geographic_facet |
Broknes East Antarctica Larsemann Hills Reservoir Lake |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
Лëд и снег, Vol 62, Iss 3, Pp 377-386 (2022) |
op_relation |
https://ice-snow.igras.ru/jour/article/view/1032 https://doaj.org/toc/2076-6734 https://doaj.org/toc/2412-3765 2076-6734 2412-3765 doi:10.31857/S2076673422030139 https://doaj.org/article/467b2342e5964dc6a6188a52c70de934 |
op_doi |
https://doi.org/10.31857/S2076673422030139 |
_version_ |
1766285965874167808 |