Microbial origin of excess greenhouse gases in glacial ice
We report the discovery of methanogenic archaea that account for abrupt factor 10 increases in methane concentration found by E. Brook at depths of 2954 and 3036 m in the GISP2 (Greenland Ice Sheet Project 2) ice core. The total microbial concentration we measured with direct cell counts tracks the...
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ftdatacite:10.48550/arxiv.q-bio/0506041 2023-05-15T16:29:14+02:00 Microbial origin of excess greenhouse gases in glacial ice Tung, H. C. Bramall, N. E. Price, P. B. 2005 https://dx.doi.org/10.48550/arxiv.q-bio/0506041 https://arxiv.org/abs/q-bio/0506041 unknown arXiv Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ Populations and Evolution q-bio.PE Cell Behavior q-bio.CB FOS Biological sciences Preprint Article article CreativeWork 2005 ftdatacite https://doi.org/10.48550/arxiv.q-bio/0506041 2022-04-01T17:38:35Z We report the discovery of methanogenic archaea that account for abrupt factor 10 increases in methane concentration found by E. Brook at depths of 2954 and 3036 m in the GISP2 (Greenland Ice Sheet Project 2) ice core. The total microbial concentration we measured with direct cell counts tracks the excesses of methanogens that we identified by their F420 fluorescence. The highly localized (<1 m thick) layers of methanogens suggest flow induced mixing of layers of microbe laden anaerobic basal ice with glacial ice. The metabolic rate we found for microbes at 2954 and 3036 m lies roughly on the Arrhenius line for microbes imprisoned in rock, sediment, and basal ice. Equating the loss rate of methane recently discovered in the Martian atmosphere to the production rate by possible methanogens, we estimate that their Martian habitat would be at a temperature of ~0 degrees C and that the concentration, if uniformly distributed in a 100 m thick layer, would be 0.04 cell per cubic centimeter. : 14 pages, 4 figures, submitted to Science Report Greenland Greenland Ice Sheet Project ice core Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Greenland |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
unknown |
topic |
Populations and Evolution q-bio.PE Cell Behavior q-bio.CB FOS Biological sciences |
spellingShingle |
Populations and Evolution q-bio.PE Cell Behavior q-bio.CB FOS Biological sciences Tung, H. C. Bramall, N. E. Price, P. B. Microbial origin of excess greenhouse gases in glacial ice |
topic_facet |
Populations and Evolution q-bio.PE Cell Behavior q-bio.CB FOS Biological sciences |
description |
We report the discovery of methanogenic archaea that account for abrupt factor 10 increases in methane concentration found by E. Brook at depths of 2954 and 3036 m in the GISP2 (Greenland Ice Sheet Project 2) ice core. The total microbial concentration we measured with direct cell counts tracks the excesses of methanogens that we identified by their F420 fluorescence. The highly localized (<1 m thick) layers of methanogens suggest flow induced mixing of layers of microbe laden anaerobic basal ice with glacial ice. The metabolic rate we found for microbes at 2954 and 3036 m lies roughly on the Arrhenius line for microbes imprisoned in rock, sediment, and basal ice. Equating the loss rate of methane recently discovered in the Martian atmosphere to the production rate by possible methanogens, we estimate that their Martian habitat would be at a temperature of ~0 degrees C and that the concentration, if uniformly distributed in a 100 m thick layer, would be 0.04 cell per cubic centimeter. : 14 pages, 4 figures, submitted to Science |
format |
Report |
author |
Tung, H. C. Bramall, N. E. Price, P. B. |
author_facet |
Tung, H. C. Bramall, N. E. Price, P. B. |
author_sort |
Tung, H. C. |
title |
Microbial origin of excess greenhouse gases in glacial ice |
title_short |
Microbial origin of excess greenhouse gases in glacial ice |
title_full |
Microbial origin of excess greenhouse gases in glacial ice |
title_fullStr |
Microbial origin of excess greenhouse gases in glacial ice |
title_full_unstemmed |
Microbial origin of excess greenhouse gases in glacial ice |
title_sort |
microbial origin of excess greenhouse gases in glacial ice |
publisher |
arXiv |
publishDate |
2005 |
url |
https://dx.doi.org/10.48550/arxiv.q-bio/0506041 https://arxiv.org/abs/q-bio/0506041 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Ice Sheet Project ice core Ice Sheet |
genre_facet |
Greenland Greenland Ice Sheet Project ice core Ice Sheet |
op_rights |
Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004 http://arxiv.org/licenses/assumed-1991-2003/ |
op_doi |
https://doi.org/10.48550/arxiv.q-bio/0506041 |
_version_ |
1766018920044560384 |