{"created":"2023-07-25T11:01:38.505980+00:00","id":3716,"links":{},"metadata":{"_buckets":{"deposit":"576130b4-c786-4d73-9092-c778fb7f430d"},"_deposit":{"created_by":4,"id":"3716","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"3716"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00003716","sets":["1259:1260:1262:524:529"]},"author_link":["5695","5701","5690","5693","5697","5694","5698","5696","5699","5691","5700","5703","5692","5702"],"item_1_alternative_title_5":{"attribute_name":"論文名よみ","attribute_value_mlt":[{"subitem_alternative_title":"AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE"}]},"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1992-02","bibliographicIssueDateType":"Issued"},"bibliographicPageStart":"178","bibliographicVolumeNumber":"5","bibliographic_titles":[{"bibliographic_title":"Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology"}]}]},"item_1_creator_7":{"attribute_name":"著者名よみ","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"ナカザワ, タカキヨ"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"マチダ, トシノブ"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"エスミ, ケンジ"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"タナカ, マサユキ"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"フジイ, ヨシユキ"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"アオキ, シュンジ"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"ワタナベ, オキツグ"}],"nameIdentifiers":[{}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"NAKAZAWA, Takakiyo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"MACHIDA, Toshinobu","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"ESUMI, Kenji","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"TANAKA, Masayuki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"FUJII, Yoshiyuki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"AOKI, Shuhji","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"WATANABE, Okitsugu","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_1_description_1":{"attribute_name":"ページ属性","attribute_value_mlt":[{"subitem_description":"P(論文)","subitem_description_type":"Other"}]},"item_1_description_12":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"Dry and melt extraction systems have been developed to determine respectively the CO_2 and CH_4 concentrations of ancient air trapped in the polar ice core. The day extraction system was confirmed to be capable of crushing a core sample of 1kg to fine powder within 2 min, and its air extraction efficiency was estimated to be 98%. The air for the CH_4 measurements was extracted by melting core samples in an evacuated chamber. The CO_2 and CH_4 concentrations were determined using gas chromatography. The overall precision of our analyses is better than ±1 ppmv for CO_2 and ±10 ppbv for CH_4. Two Antarctic ice cores were used in this study. The ice core drilled at Mizuho Station (70°42'S, 44°20'E) showed that pre-industrial levels of the CO_2 and CH_4 concentrations (3300-200 yrs BP) were 279-287 ppmv and 690-750 ppbv, respectively and both concentrations increased rapidly for the last 200 years. It was also found that the CO_2 concentrations between 800 and 200 yrs BP were higher by almost 7 ppmv than those in remaining pre-industrial time, due probably to CO_2 release from the oceans and/or the biosphere. The Yamato core drilled near the end of ice flow (near the Yamato Mountains) showed concentrations of 230-240 ppmv and 530-580 ppbv for CO_2 and CH_4,respectively, which are apparently lower than post-glacial background levels, implying that the core was formed in the glacial period.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00003716","subitem_identifier_reg_type":"JaLC"}]},"item_1_publisher_22":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"National Institute of Polar Research"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA10756213","subitem_source_identifier_type":"NCID"}]},"item_1_text_10":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University"},{"subitem_text_language":"en","subitem_text_value":"Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University"},{"subitem_text_language":"en","subitem_text_value":"Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University:(Present address)Japan Weather Association"},{"subitem_text_language":"en","subitem_text_value":"Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University"},{"subitem_text_language":"en","subitem_text_value":"National Institute of Polar Research"},{"subitem_text_language":"en","subitem_text_value":"National Institute of Polar Research"},{"subitem_text_language":"en","subitem_text_value":"National Institute of Polar Research"}]},"item_1_text_3":{"attribute_name":"記事種別(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"ABSTRACT"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1992-02-01"}],"displaytype":"detail","filename":"KJ00002409945.pdf","filesize":[{"value":"84.7 kB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00002409945","url":"https://nipr.repo.nii.ac.jp/record/3716/files/KJ00002409945.pdf"},"version_id":"cc26b5a9-cb91-4d91-bcea-98a168235e02"}]},"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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE"}]},"item_type_id":"1","owner":"4","path":["529"],"pubdate":{"attribute_name":"公開日","attribute_value":"1992-02-01"},"publish_date":"1992-02-01","publish_status":"0","recid":"3716","relation_version_is_last":true,"title":["AIR EXTRACTION SYSTEMS FOR ICE CORE AND CO_2 AND CH_4 CONCENTRATIONS IN THE PAST ATMOSPHERE"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:29:59.132547+00:00"}