Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake
Lake Bonney, a permanently ice‐covered Ant‐ arctic lake, has a middepth maximum N 2 O concentration of 41.6 µ M N (> 580,000% saturation with respect to the global average mixing ratio of N 2 O) in its east lobe, representing the highest level yet reported for a natural aquatic system. Atmosp...
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crwiley:10.4319/lo.1996.41.7.1544 2023-12-03T10:14:06+01:00 Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake Prisu, John C. Downes, Malcolm T. McKay, Christopher P. 1996 http://dx.doi.org/10.4319/lo.1996.41.7.1544 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1996.41.7.1544 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1996.41.7.1544 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1996.41.7.1544 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 41, issue 7, page 1544-1551 ISSN 0024-3590 1939-5590 Aquatic Science Oceanography journal-article 1996 crwiley https://doi.org/10.4319/lo.1996.41.7.1544 2023-11-09T14:28:10Z Lake Bonney, a permanently ice‐covered Ant‐ arctic lake, has a middepth maximum N 2 O concentration of 41.6 µ M N (> 580,000% saturation with respect to the global average mixing ratio of N 2 O) in its east lobe, representing the highest level yet reported for a natural aquatic system. Atmospheric N 2 O over the lake was 45% above the global average, indicating that this lake is an atmospheric source of N 2 O. Apparent N 2 O production (ANP) was correlated with apparent oxygen utilization (AOU), and denitrification was not detectable, implying that nitrification is the primary source for this gas. The slope of a regression of ANP on AOU revealed that potential N 2 O production per unit of potential O 2 consumed in the east lobe of Lake Bonney is at least two orders of magnitude greater than reported for the ocean. The maximum yield ratio for N 2 O [ANP/(NO 2 − + NO 3 − )] in Lake Bonney is 26% (i.e. 1 atom of N appears in N 2 O for every 3.9 atoms appearing in oxidized N), which exceeds previous reports for pelagic systems, being similar to values from reduced sediments. Areal N 2 O flux from the lake to the atmosphere is >200 times the areal flux reported for oceanic systems; most of this gas apparently enters the atmosphere through a small moat that occupies ~3% of the surface of the lake and exists for ~10 weeks in summer. Article in Journal/Newspaper Antarc* Antarctic Arctic Wiley Online Library (via Crossref) Arctic Antarctic Arctic Lake ENVELOPE(-130.826,-130.826,57.231,57.231) Bonney ENVELOPE(162.417,162.417,-77.717,-77.717) Lake Bonney ENVELOPE(-25.588,-25.588,-80.361,-80.361) Limnology and Oceanography 41 7 1544 1551 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Oceanography |
spellingShingle |
Aquatic Science Oceanography Prisu, John C. Downes, Malcolm T. McKay, Christopher P. Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake |
topic_facet |
Aquatic Science Oceanography |
description |
Lake Bonney, a permanently ice‐covered Ant‐ arctic lake, has a middepth maximum N 2 O concentration of 41.6 µ M N (> 580,000% saturation with respect to the global average mixing ratio of N 2 O) in its east lobe, representing the highest level yet reported for a natural aquatic system. Atmospheric N 2 O over the lake was 45% above the global average, indicating that this lake is an atmospheric source of N 2 O. Apparent N 2 O production (ANP) was correlated with apparent oxygen utilization (AOU), and denitrification was not detectable, implying that nitrification is the primary source for this gas. The slope of a regression of ANP on AOU revealed that potential N 2 O production per unit of potential O 2 consumed in the east lobe of Lake Bonney is at least two orders of magnitude greater than reported for the ocean. The maximum yield ratio for N 2 O [ANP/(NO 2 − + NO 3 − )] in Lake Bonney is 26% (i.e. 1 atom of N appears in N 2 O for every 3.9 atoms appearing in oxidized N), which exceeds previous reports for pelagic systems, being similar to values from reduced sediments. Areal N 2 O flux from the lake to the atmosphere is >200 times the areal flux reported for oceanic systems; most of this gas apparently enters the atmosphere through a small moat that occupies ~3% of the surface of the lake and exists for ~10 weeks in summer. |
format |
Article in Journal/Newspaper |
author |
Prisu, John C. Downes, Malcolm T. McKay, Christopher P. |
author_facet |
Prisu, John C. Downes, Malcolm T. McKay, Christopher P. |
author_sort |
Prisu, John C. |
title |
Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake |
title_short |
Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake |
title_full |
Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake |
title_fullStr |
Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake |
title_full_unstemmed |
Extreme supersaturation of nitrous oxide in a poorly ventilated Antarctic lake |
title_sort |
extreme supersaturation of nitrous oxide in a poorly ventilated antarctic lake |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.4319/lo.1996.41.7.1544 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1996.41.7.1544 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1996.41.7.1544 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1996.41.7.1544 |
long_lat |
ENVELOPE(-130.826,-130.826,57.231,57.231) ENVELOPE(162.417,162.417,-77.717,-77.717) ENVELOPE(-25.588,-25.588,-80.361,-80.361) |
geographic |
Arctic Antarctic Arctic Lake Bonney Lake Bonney |
geographic_facet |
Arctic Antarctic Arctic Lake Bonney Lake Bonney |
genre |
Antarc* Antarctic Arctic |
genre_facet |
Antarc* Antarctic Arctic |
op_source |
Limnology and Oceanography volume 41, issue 7, page 1544-1551 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1996.41.7.1544 |
container_title |
Limnology and Oceanography |
container_volume |
41 |
container_issue |
7 |
container_start_page |
1544 |
op_container_end_page |
1551 |
_version_ |
1784261192632500224 |