Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake
The stable carbon isotopic composition of methane associated with and emitted by the two dominant emergent macrophytes abundant in the many Alaskan tundra lakes, Carex rostrata and Arctophila fulva, is determined. The carbon isotopic composition of the methane was -58.6 +/- 0.5 (n=2) for Arctophila...
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1992
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ftnasantrs:oai:casi.ntrs.nasa.gov:19930032547 2023-05-15T15:23:13+02:00 Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake Chanton, Jeffrey P. Martens, Christopher S. Kelley, Cheryl A. Crill, Patrick M. Showers, William J. Unclassified, Unlimited, Publicly available Oct. 30, 1992 http://ntrs.nasa.gov/search.jsp?R=19930032547 unknown http://ntrs.nasa.gov/search.jsp?R=19930032547 Accession ID: 93A16544 Copyright Other Sources 51 Journal of Geophysical Research; 97; D15; p. 16,681-16,688. 1992 ftnasantrs 2012-02-15T19:59:09Z The stable carbon isotopic composition of methane associated with and emitted by the two dominant emergent macrophytes abundant in the many Alaskan tundra lakes, Carex rostrata and Arctophila fulva, is determined. The carbon isotopic composition of the methane was -58.6 +/- 0.5 (n=2) for Arctophila and -66.6 +/- 2.5 (n=6) for Carex. The methane emitted by these species is depleted in C-13 by 12 per mil for Arctophila and 18 per mil for Carex relative to methane withdrawn from plant stems 1-2 cm below the waterline. The results suggest more rapid transport of (C-12)H4 relative to (C-13)H4 through plants to the atmosphere. Plant stem methane concentrations ranged from 0.2 to 4.0 percent in Arctophila, with an isotopic composition of -46.1 +/- 4.3 percent (n=8). Carex stem methane concentrations ranged from 150 to 1200 ppm, with an isotopic composition of -48.3 +/- 1.4 per mil (n=3). Other/Unknown Material Arctophila fulva Tundra NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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51 |
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51 Chanton, Jeffrey P. Martens, Christopher S. Kelley, Cheryl A. Crill, Patrick M. Showers, William J. Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake |
topic_facet |
51 |
description |
The stable carbon isotopic composition of methane associated with and emitted by the two dominant emergent macrophytes abundant in the many Alaskan tundra lakes, Carex rostrata and Arctophila fulva, is determined. The carbon isotopic composition of the methane was -58.6 +/- 0.5 (n=2) for Arctophila and -66.6 +/- 2.5 (n=6) for Carex. The methane emitted by these species is depleted in C-13 by 12 per mil for Arctophila and 18 per mil for Carex relative to methane withdrawn from plant stems 1-2 cm below the waterline. The results suggest more rapid transport of (C-12)H4 relative to (C-13)H4 through plants to the atmosphere. Plant stem methane concentrations ranged from 0.2 to 4.0 percent in Arctophila, with an isotopic composition of -46.1 +/- 4.3 percent (n=8). Carex stem methane concentrations ranged from 150 to 1200 ppm, with an isotopic composition of -48.3 +/- 1.4 per mil (n=3). |
format |
Other/Unknown Material |
author |
Chanton, Jeffrey P. Martens, Christopher S. Kelley, Cheryl A. Crill, Patrick M. Showers, William J. |
author_facet |
Chanton, Jeffrey P. Martens, Christopher S. Kelley, Cheryl A. Crill, Patrick M. Showers, William J. |
author_sort |
Chanton, Jeffrey P. |
title |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake |
title_short |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake |
title_full |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake |
title_fullStr |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake |
title_full_unstemmed |
Methane transport mechanisms and isotopic fractionation in emergent macrophytes of an Alaskan tundra lake |
title_sort |
methane transport mechanisms and isotopic fractionation in emergent macrophytes of an alaskan tundra lake |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930032547 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Arctophila fulva Tundra |
genre_facet |
Arctophila fulva Tundra |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930032547 Accession ID: 93A16544 |
op_rights |
Copyright |
_version_ |
1766353936887840768 |