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Dissolved methane distribution in the South Pacific and the Southern Ocean in austral summer
http://hdl.handle.net/10659/2966
http://hdl.handle.net/10659/2966b0f770ef-699a-4add-be05-5bb5f08f80ce
名前 / ファイル | ライセンス | アクション |
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S-2012-16_yoshida.pdf (1.3 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2013-06-04 | |||||
タイトル | ||||||
タイトル | Dissolved methane distribution in the South Pacific and the Southern Ocean in austral summer | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | methane | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Pacific | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Southern Ocean | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Yoshida, Osamu
× Yoshida, Osamu× Inoue, Hisayuki Y.× Watanabe, Shuichi× Suzuki, Koji× Noriki, Shinichiro |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | [1] Oceanic methane (CH_4) was examined in the South Pacific and the Southern Ocean from December 2001 to February 2002. From the oligotrophic South Pacific (10°S) to the Subtropical Front (STF), we observed the maximum concentrations of CH_4 in the subsurface layer which ranged from 2.7 to 3.9 nmol kg^<−1>. South of the STF, higher levels of CH_4 were often detected in both the surface and the subsurface layers. Elevated surface CH_4 concentrations (3.4-6.1 nmol kg^<−1>) south of the STF tended to be higher than those north of the STF. Higher CH_4 were often concomitant with an increase in chlorophyll a levels in the Seasonal Ice Zone (SIZ). Considering that phytoplankton does not generate methane directly, the high CH_4 production probably resulted from the grazing processes of Antarctic krill and/or zooplankton fed on phytoplankton and the subsequent microbial methanogenesis in addition to the aerobic CH_4 production in the water column. Present results showed a good relation between surface CH_4 data (<50 m) and σ_θ between 10°S and the Polar Front (PF), which allow us to provide interpolation/extrapolation schemes for CH_4 concentration and sea-air CH_4 flux in the wide area ([CH_4] = 0.15 σ_θ − 0.98 (RMS = 0.21 nmol kg^<−1>, r = 0.68, n = 49, p < 0.001). The sea-air fluxes estimated during our survey were from 2.4 to 4.9 mol CH_4 km^<−2> d^<−1> between 10°S and the PF (54°S), and from 0.8 to 2.3 mol CH_4 km^<−2> d^<−1> south of the PF, where the sea-air CH_4 flux was largely affected by the wind speed. | |||||
書誌情報 |
Journal of Geophysical Research : Oceans 巻 116, 号 C7, p. 1-9, 発行日 2011-07 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0148-0227 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1029/2009JC006089 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | American Geophysical Union | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article |