The McMurdo Dry Valleys of Antarctica contain perennially
Hoare. Results confirm previous reports that 0, concentrations in the upper water column exceed atmospheric equilibrium and that N, and Ar are supersaturated throughout the water column. The mean supersaturation of N, was found to be 2.0 (*0.37) and Ar was 3.8 (rtl. 1). The ratios of N,/Ar (20.3 +3....
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.574.140 2023-05-15T13:56:11+02:00 The McMurdo Dry Valleys of Antarctica contain perennially D. T. Anderseni C. P. Mckay R. A. Wharton The Pennsylvania State University CiteSeerX Archives 1997 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.140 http://daleandersen.seti.org/Dale_Andersen/Science_articles_files/Andersen et al. 1998.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.140 http://daleandersen.seti.org/Dale_Andersen/Science_articles_files/Andersen et al. 1998.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://daleandersen.seti.org/Dale_Andersen/Science_articles_files/Andersen et al. 1998.pdf text 1997 ftciteseerx 2016-01-08T12:40:14Z Hoare. Results confirm previous reports that 0, concentrations in the upper water column exceed atmospheric equilibrium and that N, and Ar are supersaturated throughout the water column. The mean supersaturation of N, was found to be 2.0 (*0.37) and Ar was 3.8 (rtl. 1). The ratios of N,/Ar (20.3 +3.8), and 02/Ar (22.5 rt4.0) at the ice-water interface are consistent with those previously measured, suggesting that bubble formation is the main process for removing gas from the lake. However, the saturations of N, and Ar greatly exceed those previously predicted for degassing by bubble formation only at the ice-water interface. The data support the hypothesis that removal of gas by bubbles occurs in the water column to a depth of 11 m in Lake Hoare. CO, concentration increases from near zero at the ice-water interface to 80-100 times saturation at and below the chemocline at c. 28 m. There is considerable variability in the gas concentrations throughout the water column; samples separated in depth by one metre may vary by more than 50 % in gas content. It is likely that this phenomenon results from the lack of turbulent mixing in the water column. Methane (c. 2 pg 1.’) was detected below the chemocline and immediately above the sedimentlwater interface at a depth of 30 m. Samples from lakes Vanda, Joyce, and Miers, also show supersaturations of 0,, N2, and Ar at levels similar to levels found Text Antarc* Antarctica McMurdo Dry Valleys Unknown McMurdo Dry Valleys Miers ENVELOPE(163.850,163.850,-78.100,-78.100) Vanda ENVELOPE(161.550,161.550,-77.533,-77.533) Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) Lake Hoare ENVELOPE(162.850,162.850,-77.633,-77.633) |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
Hoare. Results confirm previous reports that 0, concentrations in the upper water column exceed atmospheric equilibrium and that N, and Ar are supersaturated throughout the water column. The mean supersaturation of N, was found to be 2.0 (*0.37) and Ar was 3.8 (rtl. 1). The ratios of N,/Ar (20.3 +3.8), and 02/Ar (22.5 rt4.0) at the ice-water interface are consistent with those previously measured, suggesting that bubble formation is the main process for removing gas from the lake. However, the saturations of N, and Ar greatly exceed those previously predicted for degassing by bubble formation only at the ice-water interface. The data support the hypothesis that removal of gas by bubbles occurs in the water column to a depth of 11 m in Lake Hoare. CO, concentration increases from near zero at the ice-water interface to 80-100 times saturation at and below the chemocline at c. 28 m. There is considerable variability in the gas concentrations throughout the water column; samples separated in depth by one metre may vary by more than 50 % in gas content. It is likely that this phenomenon results from the lack of turbulent mixing in the water column. Methane (c. 2 pg 1.’) was detected below the chemocline and immediately above the sedimentlwater interface at a depth of 30 m. Samples from lakes Vanda, Joyce, and Miers, also show supersaturations of 0,, N2, and Ar at levels similar to levels found |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
D. T. Anderseni C. P. Mckay R. A. Wharton |
spellingShingle |
D. T. Anderseni C. P. Mckay R. A. Wharton The McMurdo Dry Valleys of Antarctica contain perennially |
author_facet |
D. T. Anderseni C. P. Mckay R. A. Wharton |
author_sort |
D. T. Anderseni |
title |
The McMurdo Dry Valleys of Antarctica contain perennially |
title_short |
The McMurdo Dry Valleys of Antarctica contain perennially |
title_full |
The McMurdo Dry Valleys of Antarctica contain perennially |
title_fullStr |
The McMurdo Dry Valleys of Antarctica contain perennially |
title_full_unstemmed |
The McMurdo Dry Valleys of Antarctica contain perennially |
title_sort |
mcmurdo dry valleys of antarctica contain perennially |
publishDate |
1997 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.140 http://daleandersen.seti.org/Dale_Andersen/Science_articles_files/Andersen et al. 1998.pdf |
long_lat |
ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(161.550,161.550,-77.533,-77.533) ENVELOPE(162.850,162.850,-77.633,-77.633) ENVELOPE(162.850,162.850,-77.633,-77.633) |
geographic |
McMurdo Dry Valleys Miers Vanda Hoare Lake Hoare |
geographic_facet |
McMurdo Dry Valleys Miers Vanda Hoare Lake Hoare |
genre |
Antarc* Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys |
op_source |
http://daleandersen.seti.org/Dale_Andersen/Science_articles_files/Andersen et al. 1998.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.140 http://daleandersen.seti.org/Dale_Andersen/Science_articles_files/Andersen et al. 1998.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766263557471600640 |