First measurements of methane and its carbon isotope ratio in the Japan Sea (East Sea) SCIE SCOPUS
DC Field | Value | Language |
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dc.contributor.author | Gamo, Toshitaka | - |
dc.contributor.author | Tsunogai, Urumu | - |
dc.contributor.author | Hirota, Akinari | - |
dc.contributor.author | Nakayama, Noriko | - |
dc.contributor.author | Kang, Dong-Jin | - |
dc.contributor.author | Kim, Kyung-Ryul | - |
dc.date.accessioned | 2020-04-20T06:55:43Z | - |
dc.date.available | 2020-04-20T06:55:43Z | - |
dc.date.created | 2020-01-28 | - |
dc.date.issued | 2012-01-20 | - |
dc.identifier.issn | 0304-4203 | - |
dc.identifier.uri | https://sciwatch.kiost.ac.kr/handle/2020.kiost/3643 | - |
dc.description.abstract | We measured dissolved methane (CH4) and its carbon isotope ratio (C-13/C-12 or delta C-13) from surface to bottom seawaters (maximum depth: 3574 m) for the first time in three major offshore areas of the Japan Sea (East Sea): the eastern Japan Basin, Yamato Basin, and Ulleung Basin. Seawater samples were taken during the KT-07-24 cruise of the R/V Tansei Maru in 2007 as part of a Japan-Korea collaborative study. The CH4 concentration and its delta C-13(PDB) were obtained by continuous flow isotope ratio mass spectrometry. While the CH4 concentrations of surface seawater were 2.6-3.8 nmol kg(-1), which was 43( +/- 22)% supersaturated compared to the atmospheric equilibrium values, those in the subsurface (D=30-150 m) showed much higher values up to 9.7 nmol kg(-1) (similar to 300% supersaturation). This subsurface CH4 had the minimum delta C-13 value of -54.3 parts per thousand (less than the atmospheric CH4 value of -47 parts per thousand), implying a contribution from in situ microbial CH4 production in some anoxic microenvironments. The CH4 concentration decreased with depth toward minimum values of similar to 1 nmol kg(-1) (delta C-13, -30 to -40 parts per thousand.) at 1500-2000 m depth. Below a depth of 2000 m, we found a clear difference in CH4 profiles among the three basins; in the eastern Japan Basin the CH4 concentration remained almost constant down to the seafloor, while it gradually increased with depth up to > 2.0 nmol kg(-1) in the Yamato and Ulleung basins. This CH4 increase toward the bottom was accompanied by a decrease of delta C-13-CH4 to less than -50 parts per thousand, suggesting a microbial CH4 supply from bottom sediment in the Yamato and Ulleung basins. We observed a local CH4 plume over a deep channel east of the Yamato Basin, indicating unknown submarine CH4 seepage with a microbial delta C-13 value of about -60 parts per thousand. (C) 2011 Elsevier B.V. All rights reserved. | - |
dc.description.uri | 1 | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject | AGING HYDROTHERMAL PLUMES | - |
dc.subject | GAS HYDRATE | - |
dc.subject | ULLEUNG BASIN | - |
dc.subject | PROPER WATER | - |
dc.subject | OXIDATION | - |
dc.subject | FRACTIONATION | - |
dc.subject | HYDROGEN | - |
dc.subject | DIOXIDE | - |
dc.subject | RIDGE | - |
dc.subject | FLUX | - |
dc.title | First measurements of methane and its carbon isotope ratio in the Japan Sea (East Sea) | - |
dc.type | Article | - |
dc.citation.endPage | 99 | - |
dc.citation.startPage | 92 | - |
dc.citation.title | MARINE CHEMISTRY | - |
dc.citation.volume | 128 | - |
dc.contributor.alternativeName | 강동진 | - |
dc.identifier.bibliographicCitation | MARINE CHEMISTRY, v.128, pp.92 - 99 | - |
dc.identifier.doi | 10.1016/j.marchem.2011.10.006 | - |
dc.identifier.scopusid | 2-s2.0-84855857185 | - |
dc.identifier.wosid | 000300268900010 | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | AGING HYDROTHERMAL PLUMES | - |
dc.subject.keywordPlus | GAS HYDRATE | - |
dc.subject.keywordPlus | ULLEUNG BASIN | - |
dc.subject.keywordPlus | PROPER WATER | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | FRACTIONATION | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordPlus | DIOXIDE | - |
dc.subject.keywordPlus | RIDGE | - |
dc.subject.keywordPlus | FLUX | - |
dc.subject.keywordAuthor | Dissolved methane | - |
dc.subject.keywordAuthor | Carbon isotope ratio | - |
dc.subject.keywordAuthor | Microbial CH4 production and consumption | - |
dc.subject.keywordAuthor | Chemical tracers | - |
dc.subject.keywordAuthor | Japan Sea | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Oceanography | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Oceanography | - |