{"created":"2023-07-25T08:06:46.846230+00:00","id":5676,"links":{},"metadata":{"_buckets":{"deposit":"a41f10fa-8c44-4498-bc45-ad859baaf529"},"_deposit":{"created_by":18,"id":"5676","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"5676"},"status":"published"},"_oai":{"id":"oai:ir.kagoshima-u.ac.jp:00005676","sets":["228:243:5192","51:52"]},"author_link":["112278","668"],"item_7_biblio_info_5":{"attribute_name":"収録雑誌名","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2014-03-20","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"26","bibliographicPageStart":"1","bibliographicVolumeNumber":"11","bibliographic_titles":[{"bibliographic_title":"地域政策科学研究","bibliographic_titleLang":"ja"},{"bibliographic_title":"Journal of the doctorate studies in social sciences","bibliographic_titleLang":"en"}]}]},"item_7_date_6":{"attribute_name":"作成日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2014-03-20","subitem_date_issued_type":"Issued"}]},"item_7_description_4":{"attribute_name":"要約(Abstract)","attribute_value_mlt":[{"subitem_description":"The SO2 gas concentration data on the ground surface at 21 stations around Sakurajima volcano in Kagoshima Prefecture during 2001-2012 were analyzed with respect to weather situation and correlation with the amounts of ash-fall and SPM. In recent years, there is a tendency to increase the high concentration events exceeding 100 ppb which is the environmental standard. The entire events of high concentration are dominated by the events at Arimura station, associated with the blow down of volcanic gas to the foot of the mountain. Other stations inside Sakurajima also suffer high concentration events according to the wind direction, and also outside Sakurajima to some extent. Quite different pattern of the high concentration events with a weak wind was confirmed. The convection current develops above the ground in the daytime owing to the sunshine in fine weather, and brings down the gas from plume height above the summit to the ground. Then the dispersion of the gas is governed by ground winds that change direction easily, resulting the detection of SO2 at the stations inside and outside Sakurajima in different directions. Strong correlation of ash fall amount with\nhigh concentration events of SPM and SO2 station was observed at Arimura. This indicates that, if Sakurajima volcano becomes very active, they will start to increase at the same time, possibly bringing a disaster complex. Therefore, for the disaster prevention or mitigation, comprehensive measures should be taken against volcanic ejecta around Sakurajima volcano.","subitem_description_language":"en","subitem_description_type":"Other"},{"subitem_description":"本研究では，2001年～2012年に鹿児島県および鹿児島市が桜島内外21カ所で測定したSO2ガス濃度を環境省が定めている環境基準に照らし合わせ，これを超えるSO2ガス高濃度事象と風向・風速との関連，およびSO2ガス高濃度事象とSPM 量高濃度事象および降灰量の相関について検討した。本研究で，近年この環境基準を超えるSO2ガス高濃度事象が増加する傾向にあることがわかった。そして全体のSO2ガス高濃度事象の月別・年別時数は，有村局のSO2ガス高濃度事象のそれによって特徴付けられることもわかった。高濃度事象の主因は，強風によって山頂付近の火口から山麓へSO2ガスが高濃度のまま吹き降ろされることである。その風向によって下流にある特定の測定局が影響を受け，条件によっては島外の下流遠方で高濃度事象が見られる場合もある。また，弱風下で全方位的にSO2ガス高濃度事象が測定される場合があることも明らかにした。これは桜島火山上空でゆっくりと拡散したSO2ガスが対流混合によって地上付近に滞留し，変化しやすい地上風の風向に支配され，桜島火山周辺全域の測定局で高濃度事象が検出されるメカニズムであると考えられる。さらに近年，有村局で測定されるSO2ガス濃度高濃度事象・SPM 量高濃度事象・降灰量は，互いに高い相関が認められるようになってきた。それゆえ火山活動が盛んになるとSO2ガス濃度高濃度事象・SPM 量高濃度事象・降灰量は同時に増加し始め，複合的な災害になる可能性が高い。それゆえ桜島火山の周囲では火山噴出物に関して，それぞれ個別の対策だけではなく，総合的な防災対策を採るべきである。","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_7_publisher_23":{"attribute_name":"公開者・出版者","attribute_value_mlt":[{"subitem_publisher":"鹿児島大学","subitem_publisher_language":"ja"},{"subitem_publisher":"Kagoshima University","subitem_publisher_language":"en"}]},"item_7_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"13490699","subitem_source_identifier_type":"PISSN"}]},"item_7_source_id_9":{"attribute_name":"NII書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA11950379","subitem_source_identifier_type":"NCID"}]},"item_7_subject_15":{"attribute_name":"NDC","attribute_value_mlt":[{"subitem_subject":"453.8","subitem_subject_scheme":"NDC"},{"subitem_subject":"519","subitem_subject_scheme":"NDC"}]},"item_7_version_type_14":{"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":"坂本, 昌弥","creatorNameLang":"ja"},{"creatorName":"SAKAMOTO, Masaya","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"112278","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"木下, 紀正","creatorNameLang":"ja"},{"creatorName":"KINOSHITA, Kisei","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"668","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"1000080037209","nameIdentifierScheme":"NRID","nameIdentifierURI":" "}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2016-10-28"}],"displaytype":"detail","filename":"1-26.pdf","filesize":[{"value":"3.7 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"label":"1-26.pdf","objectType":"fulltext","url":"https://ir.kagoshima-u.ac.jp/record/5676/files/1-26.pdf"},"version_id":"2607b7f4-a1c4-49e0-ba5d-8d4b6db3b0a4"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"二酸化硫黄","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"風向・風速","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"浮遊粒子状物質","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"降灰量","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"高濃度事象","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"Sulfur dioxide","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Wind speed and wind direction","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"SPM","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Ash fall amount","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"High concentration event","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"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":"桜島火山ガスの挙動と防災","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"桜島火山ガスの挙動と防災","subitem_title_language":"ja"},{"subitem_title":"Behavior of Volcanic Gas and Disaster Prevention at Sakurajima Volcano","subitem_title_language":"en"}]},"item_type_id":"7","owner":"18","path":["52","5192"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2016-04-08"},"publish_date":"2016-04-08","publish_status":"0","recid":"5676","relation_version_is_last":true,"title":["桜島火山ガスの挙動と防災"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2024-06-18T01:43:54.780012+00:00"}