{"created":"2023-07-25T11:05:39.540884+00:00","id":8975,"links":{},"metadata":{"_buckets":{"deposit":"cf4a6819-eca5-4dd2-9402-96c2f90f2a98"},"_deposit":{"created_by":4,"id":"8975","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"8975"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00008975","sets":["1259:906:1236:1116"]},"author_link":["20486","15789","14213","20487"],"item_1_alternative_title_5":{"attribute_name":"論文名よみ","attribute_value_mlt":[{"subitem_alternative_title":"ナンキョク セイソウケン ノ チッソ サンカブツ ノ カガク"}]},"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1997-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"283","bibliographicPageStart":"271","bibliographicVolumeNumber":"41","bibliographic_titles":[{"bibliographic_title":"南極資料"},{"bibliographic_title":"Antarctic Record","bibliographic_titleLang":"en"}]}]},"item_1_creator_6":{"attribute_name":"著者名(日)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"近藤, 豊"},{"creatorName":"コンドウ, ユタカ","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"小池, 真"},{"creatorName":"コイケ, マコト","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kondo, Yutaka","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Koike, Makoto","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_11":{"attribute_name":"抄録(日)","attribute_value_mlt":[{"subitem_description":"南極の春先に成層圏オゾンが減少する\"オゾンホール\"の形成において, 窒素酸化物の季節変化は重要な役割を果たしている。オゾンを破壊する塩素酸化物(Cl, ClOなど)は, 二酸化窒素(NO_2)と反応するとオゾンを直接破壊しない準安定物質であるClONO_2に変換されてしまう。このため冬から春先へかけてのNO_2の不活性化(HNO_3への変換)と, HNO_3を取り込んだ極成層圏雲(PSCs)の重力落下による窒素酸化物の成層圏からの除去過程(脱窒denitrification)がオゾンホール出現のために不可欠な条件となっている。このような窒素酸化物の季節変化を調べるために, 成層圏NO_2の連続観測を南極昭和基地において1990年3月より可視分光器を使って始めた。この結果, 夏に極大, 冬に極小が現れ, 春先にはNO_2の不活性化と脱窒により増加が遅い明瞭な季節変化が得られた。この春先のNO_2のゆっくりとした増加は, PSCs上での不均一反応を取り入れたモデル計算と良く一致した。これらの結果は, オゾンホール中でのオゾンの減少を定量的に理解する上で鍵となるNO_2量を, 観測から明かにし, モデルの中で再現できる事を確かめたという点で重要である。一方, 1991年の年末の極渦の崩壊から1992年初めの秋にかけては, ピナツボ火山噴火によって増大した硫酸エーロゾル上での不均一反応により, NO_2が30%ぐらい減少した結果が得られた。この不均一反応は夜間に生成するN_2O_5を必要とするため, 一日中光のあたる南極の夏におけるNO_2の減少は, 中緯度においてNO_2が既に減少した空気が輸送されてきた結果と考えられる。","subitem_description_type":"Other"}]},"item_1_description_12":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"Low levels of reactive nitrogen species are essential for large stratospheric ozone (O_3) depletion over the Antarctic continent in the austral spring (Antarctic ozone hole), because ClO is sequestered by a reaction with NO_2 to form a quasi-stable molecule ClONO_2. The column amounts of NO_2 have been measured using a visible spectrometer at Syowa Station, Antarctica (69°S) since March 1990. The NO_2 column exhibits a large seasonal variation with a maximum in summer and a minimum in winter. The recovery of NO_2 in spring is 2-3 times slower than the fall decay. The low NO_2 level in mid-winter to early spring is considered to be due to a conversion into HNO_3 on PSCs and due to the denitrification by gravitational sedimentation of PSC particles. Results from a chemical box model agreed well with this slow rate of NO_2 increase in spring when heterogeneous chemistry on PSCs was included. The reduction of NO_2 by 30% was found after the breakup of the austral polar vortex in 1992. This is probably due to the transport of air from lower latitudes, where NO_2 is reduced by heterogeneous conversion into HNO_3 on the surface of sulfate aerosols increased by the Pinatubo volcanic eruption.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00008975","subitem_identifier_reg_type":"JaLC"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AN00181831","subitem_source_identifier_type":"NCID"}]},"item_1_source_id_20":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"00857289","subitem_source_identifier_type":"ISSN"}]},"item_1_subject_21":{"attribute_name":"国際十進分類法","attribute_value_mlt":[{"subitem_subject":"551.5","subitem_subject_scheme":"UDC"}]},"item_1_text_10":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Solar-Terrestrial Environment Laboratory, Nagoya University"},{"subitem_text_language":"en","subitem_text_value":"Solar-Terrestrial Environment Laboratory, Nagoya University"}]},"item_1_text_9":{"attribute_name":"著者所属(日)","attribute_value_mlt":[{"subitem_text_value":"名古屋大学太陽地球環境研究所"},{"subitem_text_value":"名古屋大学太陽地球環境研究所"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1997-03-01"}],"displaytype":"detail","filename":"KJ00000140324.pdf","filesize":[{"value":"463.3 kB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000140324","url":"https://nipr.repo.nii.ac.jp/record/8975/files/KJ00000140324.pdf"},"version_id":"56ca657c-8343-44a6-8e85-e4821e18ed63"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"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":"南極成層圏の窒素酸化物の化学","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"南極成層圏の窒素酸化物の化学"},{"subitem_title":"Chemistry of the reactive nitrogen in the Antarctic stratosphere","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["1116"],"pubdate":{"attribute_name":"公開日","attribute_value":"1997-03-01"},"publish_date":"1997-03-01","publish_status":"0","recid":"8975","relation_version_is_last":true,"title":["南極成層圏の窒素酸化物の化学"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:13:32.981002+00:00"}