{"created":"2023-06-19T07:00:22.958799+00:00","id":1660,"links":{},"metadata":{"_buckets":{"deposit":"2db9a86b-91ba-4f33-8e05-3bdb3b3e301c"},"_deposit":{"created_by":3,"id":"1660","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"1660"},"status":"published"},"_oai":{"id":"oai:rakuno.repo.nii.ac.jp:00001660","sets":["9:10:23:24"]},"author_link":["3768","3767","3766","3769","3770","3765"],"item_2_biblio_info_9":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-08","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"31","bibliographicPageStart":"24","bibliographicVolumeNumber":"382","bibliographic_titles":[{"bibliographic_title":"Chemical Geology"}]}]},"item_2_description_43":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"subitem_description":"Article","subitem_description_type":"Other"}]},"item_2_description_6":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We analyzed the concentration and stable carbon isotopic ratio (δ^<13>C-CH_4) of methane in the atmosphere and in dissolved methane in water column along 17°S in the subtropical South Pacific. Additionally, the hydrogen isotopic ratios (δD-CH_4) of some water samples were analyzed. The sea–air CH_4 flux is high in the eastern region and off the west coast of Australia, which is related to the high concentrations of dissolved CH_4 and high wind speeds. Moreover, there is a positive correlation between the CH4 and chlorophyll a concentrations at the surface. This consistency suggested that active CH_4 productions related to the primary production cause surface CH_4 accumulation. CH_4 shows a decrease in concentration and an increase in δ^<13>C-CH_4 and δD-CH_4 values from the surface to the depth of about 1000 m. The relationship between δ^<13>C-CH_4 values and CH_4 concentration indicates that the isotopic enrichment of CH_4 reflects microbial oxidation of CH_4 with isotopic fractionation during vertical transport via vertical sinking and/or zooplankton migration. East of 120°W, δ^<13>C-CH_4 values at around 1000 m exceed − 30.0‰. The relationships among the δ^<13>C-CH_4 values, CH_4 concentrations, and oxygen concentrations indicate that the ^<13>C-enriched CH_4 originates not only from in situ CH_4 production and oxidation but also from CH_4 transported from the eastern margin off Peru. Furthermore, at a site near the Central Lau Spreading Centers in the Lau Basin, high δ^<13>C-CH_4 values (up to − 21.4‰) are observed in the benthic water, suggesting a hydrothermal field source.","subitem_description_type":"Abstract"}]},"item_2_publisher_36":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Elsevier B.V."}]},"item_2_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.chemgeo.2014.05.024","subitem_relation_type_select":"DOI"}}]},"item_2_rights_15":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license"}]},"item_2_rights_16":{"attribute_name":"権利（URI）","attribute_value_mlt":[{"subitem_rights":"http://creativecommons.org/licenses/by-nc-nd/3.0/ | http://creativecommons.org/licenses/by-nc-nd/3.0/"}]},"item_2_source_id_10":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0009-2541","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_19":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yoshikawa, Chisato"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hayashi, Elena"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yamada, Keita"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yoshida, Osamu"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Toyoda, Sakae"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yoshida, Naohiro"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-09-14"}],"displaytype":"detail","filename":"S-2015-6_yoshida.pdf","filesize":[{"value":"1.4 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"S-2015-6_yoshida.pdf","url":"https://rakuno.repo.nii.ac.jp/record/1660/files/S-2015-6_yoshida.pdf"},"version_id":"f070c0e4-b600-409a-a841-ecb78314bb45"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Stable isotopes","subitem_subject_scheme":"Other"},{"subitem_subject":"Methane sources and sinks","subitem_subject_scheme":"Other"},{"subitem_subject":"Marine methane flux","subitem_subject_scheme":"Other"},{"subitem_subject":"Subtropical South Pacific","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Methane sources and sinks in the subtropical South Pacific along 17°S as traced by stable isotope ratiosOriginal Research Article","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Methane sources and sinks in the subtropical South Pacific along 17°S as traced by stable isotope ratiosOriginal Research Article"}]},"item_type_id":"2","owner":"3","path":["24"],"pubdate":{"attribute_name":"公開日","attribute_value":"2016-05-23"},"publish_date":"2016-05-23","publish_status":"0","recid":"1660","relation_version_is_last":true,"title":["Methane sources and sinks in the subtropical South Pacific along 17°S as traced by stable isotope ratiosOriginal Research Article"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-06-19T09:03:48.420798+00:00"}