Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica
We use the concentrations of noble gases (He, Ne, and Ar), helium isotopes, and tritium to characterize the mechanisms and rates of ventilation for Lake Fryxell, Antarctica, as well as the physical processes controlling dissolved gases. The upper oxic zone is ventilated on timescales of several deca...
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Language: | English |
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crwiley:10.4319/lo.1998.43.2.0265 2023-12-03T10:13:38+01:00 Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica Hood, E. M. Howes, B. L. Jenkins, W. J. 1998 http://dx.doi.org/10.4319/lo.1998.43.2.0265 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1998.43.2.0265 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.2.0265 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 43, issue 2, page 265-272 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 1998 crwiley https://doi.org/10.4319/lo.1998.43.2.0265 2023-11-09T14:19:29Z We use the concentrations of noble gases (He, Ne, and Ar), helium isotopes, and tritium to characterize the mechanisms and rates of ventilation for Lake Fryxell, Antarctica, as well as the physical processes controlling dissolved gases. The upper oxic zone is ventilated on timescales of several decades. The anoxic bottom waters are weakly ventilated, with a turnover time of ∼3,800 years. In the upper euphotic zone, helium and neon are greatly undersaturated with respect to solubility equilibrium with the atmosphere, whereas argon is greatly supersaturated owing to equilibrium partitioning of the gases between ice, water, and air inclusions in the ice. In the bottom waters, the inert dissolved gas concentrations may be remnants of a near‐desiccation event that occurred ∼2,000 years B.P., consistent with current paleoclimatic theories. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library (via Crossref) Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Lake Fryxell ENVELOPE(163.183,163.183,-77.617,-77.617) Limnology and Oceanography 43 2 265 272 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Oceanography |
spellingShingle |
Aquatic Science Oceanography Hood, E. M. Howes, B. L. Jenkins, W. J. Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica |
topic_facet |
Aquatic Science Oceanography |
description |
We use the concentrations of noble gases (He, Ne, and Ar), helium isotopes, and tritium to characterize the mechanisms and rates of ventilation for Lake Fryxell, Antarctica, as well as the physical processes controlling dissolved gases. The upper oxic zone is ventilated on timescales of several decades. The anoxic bottom waters are weakly ventilated, with a turnover time of ∼3,800 years. In the upper euphotic zone, helium and neon are greatly undersaturated with respect to solubility equilibrium with the atmosphere, whereas argon is greatly supersaturated owing to equilibrium partitioning of the gases between ice, water, and air inclusions in the ice. In the bottom waters, the inert dissolved gas concentrations may be remnants of a near‐desiccation event that occurred ∼2,000 years B.P., consistent with current paleoclimatic theories. |
format |
Article in Journal/Newspaper |
author |
Hood, E. M. Howes, B. L. Jenkins, W. J. |
author_facet |
Hood, E. M. Howes, B. L. Jenkins, W. J. |
author_sort |
Hood, E. M. |
title |
Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica |
title_short |
Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica |
title_full |
Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica |
title_fullStr |
Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica |
title_full_unstemmed |
Dissolved gas dynamics in perennially ice‐covered Lake Fryxell, Antarctica |
title_sort |
dissolved gas dynamics in perennially ice‐covered lake fryxell, antarctica |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.4319/lo.1998.43.2.0265 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1998.43.2.0265 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1998.43.2.0265 |
long_lat |
ENVELOPE(163.183,163.183,-77.617,-77.617) ENVELOPE(163.183,163.183,-77.617,-77.617) |
geographic |
Fryxell Lake Fryxell |
geographic_facet |
Fryxell Lake Fryxell |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Limnology and Oceanography volume 43, issue 2, page 265-272 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1998.43.2.0265 |
container_title |
Limnology and Oceanography |
container_volume |
43 |
container_issue |
2 |
container_start_page |
265 |
op_container_end_page |
272 |
_version_ |
1784260471650516992 |