Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere
The 13C isotopic composition of methane emitted to the troposphere from Amazon capims (floating grassmats) ranged from −36.9 to −48.0‰, averaging −44.4 ± 4.2‰. All pools of methane associated with the grassmats were 13C enriched; methane withdrawn from plant stems ranged from −39 to −49‰ while bubbl...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1989
|
Subjects: | |
Online Access: | https://doi.org/10.17615/c9yd-2w22 https://cdr.lib.unc.edu/downloads/n583z4678?file=thumbnail https://cdr.lib.unc.edu/downloads/n583z4678 |
id |
ftcarolinadr:cdr.lib.unc.edu:0z709626k |
---|---|
record_format |
openpolar |
spelling |
ftcarolinadr:cdr.lib.unc.edu:0z709626k 2023-06-11T04:09:25+02:00 Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere Chanton, J. Crill, P. Bartlett, K. Martens, C. University of North Carolina at Chapel Hill 1989 https://doi.org/10.17615/c9yd-2w22 https://cdr.lib.unc.edu/downloads/n583z4678?file=thumbnail https://cdr.lib.unc.edu/downloads/n583z4678 English eng https://doi.org/10.17615/c9yd-2w22 https://cdr.lib.unc.edu/downloads/n583z4678?file=thumbnail https://cdr.lib.unc.edu/downloads/n583z4678 http://rightsstatements.org/vocab/InC/1.0/ Geophysical Research Letters, 16(8) isotopic composition methane grassmat Brazil Amazonia floating grassmat capims South America carbon isotope Article 1989 ftcarolinadr https://doi.org/10.17615/c9yd-2w22 2023-05-28T21:03:02Z The 13C isotopic composition of methane emitted to the troposphere from Amazon capims (floating grassmats) ranged from −36.9 to −48.0‰, averaging −44.4 ± 4.2‰. All pools of methane associated with the grassmats were 13C enriched; methane withdrawn from plant stems ranged from −39 to −49‰ while bubbles stirred from the root mat averaged −41.4‰. As the CH4 flux from these habitats makes up some 40% of the total flux from the Amazon floodplain, CH4 emissions from the region as a whole must be enriched in the heavy carbon isotope. Methane withdrawn from the stems of five genera of rooted macrophytes ranging in latitude from the Florida Everglades to the Alaskan Arctic exhibited 13C enrichment relative to the sedimentary methane bubble reservoir. Several hypotheses based upon isotopic fractionation by methane transport, oxidation and production processes are proposed to explain this phenomenon. Article in Journal/Newspaper Arctic Carolina Digital Repository (UNC - University of North Carolina) Arctic |
institution |
Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
op_collection_id |
ftcarolinadr |
language |
English |
topic |
isotopic composition methane grassmat Brazil Amazonia floating grassmat capims South America carbon isotope |
spellingShingle |
isotopic composition methane grassmat Brazil Amazonia floating grassmat capims South America carbon isotope Chanton, J. Crill, P. Bartlett, K. Martens, C. Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere |
topic_facet |
isotopic composition methane grassmat Brazil Amazonia floating grassmat capims South America carbon isotope |
description |
The 13C isotopic composition of methane emitted to the troposphere from Amazon capims (floating grassmats) ranged from −36.9 to −48.0‰, averaging −44.4 ± 4.2‰. All pools of methane associated with the grassmats were 13C enriched; methane withdrawn from plant stems ranged from −39 to −49‰ while bubbles stirred from the root mat averaged −41.4‰. As the CH4 flux from these habitats makes up some 40% of the total flux from the Amazon floodplain, CH4 emissions from the region as a whole must be enriched in the heavy carbon isotope. Methane withdrawn from the stems of five genera of rooted macrophytes ranging in latitude from the Florida Everglades to the Alaskan Arctic exhibited 13C enrichment relative to the sedimentary methane bubble reservoir. Several hypotheses based upon isotopic fractionation by methane transport, oxidation and production processes are proposed to explain this phenomenon. |
author2 |
University of North Carolina at Chapel Hill |
format |
Article in Journal/Newspaper |
author |
Chanton, J. Crill, P. Bartlett, K. Martens, C. |
author_facet |
Chanton, J. Crill, P. Bartlett, K. Martens, C. |
author_sort |
Chanton, J. |
title |
Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere |
title_short |
Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere |
title_full |
Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere |
title_fullStr |
Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere |
title_full_unstemmed |
Amazon Capims (floating grassmats): A source of 13C enriched methane to the troposphere |
title_sort |
amazon capims (floating grassmats): a source of 13c enriched methane to the troposphere |
publishDate |
1989 |
url |
https://doi.org/10.17615/c9yd-2w22 https://cdr.lib.unc.edu/downloads/n583z4678?file=thumbnail https://cdr.lib.unc.edu/downloads/n583z4678 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Geophysical Research Letters, 16(8) |
op_relation |
https://doi.org/10.17615/c9yd-2w22 https://cdr.lib.unc.edu/downloads/n583z4678?file=thumbnail https://cdr.lib.unc.edu/downloads/n583z4678 |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/c9yd-2w22 |
_version_ |
1768383263547588608 |