Publication: Methane production, consumption and its carbon isotope ratios in the Southern Ocean during the austral summer
Issued Date
2010
Resource Type
Language
eng
ISSN
1810-6277 (Print)
1810-6285 (Online)
1810-6285 (Online)
Rights
Mahidol University.
Bibliographic Citation
Biogeosciences Discussions. Vol.7, No.5 (2010), 7207-7225.
Suggested Citation
N. Boontanon, S. Watanabe, T. Odate, N. Yoshida, Narin Boontanon, นรินทร์ บุญตานนท์ Methane production, consumption and its carbon isotope ratios in the Southern Ocean during the austral summer. Biogeosciences Discussions. Vol.7, No.5 (2010), 7207-7225.. doi:10.5194/bgd-7-7207-2010 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/48481
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Title
Methane production, consumption and its carbon isotope ratios in the Southern Ocean during the austral summer
Other Contributor(s)
Mahidol University. Faculty of Environment and Resource Studies.
Japan Science and Technology Agency. 2SORST project.
Japan Marine Science and Technology Center
Japan. National Institute of Polar Research.
Interdisciplinary Graduate School of Science and Engineering. Department of Environmental Science and Technology.
Japan Science and Technology Agency. 2SORST project.
Japan Marine Science and Technology Center
Japan. National Institute of Polar Research.
Interdisciplinary Graduate School of Science and Engineering. Department of Environmental Science and Technology.
Abstract
The distribution of dissolved CH4 in the Southern Ocean at 140 E was measured during
the austral summer. Surface CH4 was supersaturated on average, and the calculated
mean sea-air flux rate was 0.32 μmolm−2 d−1. The vertical distributions exhibited
a CH4 5 maximum at approximately 125 m (ÉCH4, 2.94 nM) below the chlorophyll-rich
layer, suggesting a relationship between CH4 production and plankton dynamics in this
area. CH4 oxidation and ocean movement characteristics in the deep layer led to the
enrichment and fluctuation of 13CCH4
. We estimated the influence of Southern Ocean
CH4, a source of isotopically heavy CH4 to the atmosphere, on the global CH4 budget
10 to be approximately 0.19Gg d−1.