{"created":"2023-07-25T11:03:27.419743+00:00","id":6351,"links":{},"metadata":{"_buckets":{"deposit":"c91f40ff-2ef3-4a5c-8494-cea1ca46fb54"},"_deposit":{"created_by":4,"id":"6351","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"6351"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00006351","sets":["1259:1260:1261:802:806"]},"author_link":["35758","10184","35760","35761","35757","35755","35756","35759"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2002-09","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"125","bibliographicPageStart":"111","bibliographicVolumeNumber":"16","bibliographic_titles":[{"bibliographic_title":"Advances in polar upper atmosphere research"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kirkwood,S.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Barabash,V.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Belova,E.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Nilsson,H.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Rao,T.N.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Stebel,K.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Osepian,A.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Chilson,Phillip B.","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":"Thin layers of enhanced radar echoes in the winter mesosphere have been observed by the ESRAD 52 MHz MST radar (67°53 ' N, 21°06 ' E) during several recent solar proton events. These polar mesosphere winter echoes (PMWE) can occur at any time of day or night above 70 km altitude, whereas below this height they are seen only during daytime. An energy deposition / ion-chemical model is used to calculate electron and ion densities from the observed proton fluxes. It is found that PMWE occurrence correlates well with low values of λ(the ratio of negative ion density to electron density). There is a sharp cut-off in PMWE occurrence at λ～10^<2>, which is independent of electron density. No direct dependence of PMWE occurrence on electron density can be found within the range represented by the solar proton events, with PMWE being observed at all levels of electron density corresponding to values of λ<10^<2>. Together with results concerning the thickness, echo aspect-sensitivity and echo spectral-width of the PMWE, this observation leads to the conclusion that the layers cannot be explained by turbulence alone. A role for charged aerosols in creating PMWE is proposed.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00006351","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":"AA11397422","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":"Swedish Institute of Space Physics/Swedish Institute of Space Physics/Swedish Institute of Space Physics/Swedish Institute of Space Physics/Swedish Institute of Space Physics/Swedish Institute of Space Physics/Polar Geophysical Institute/Cooperative Institute for Research in Environmental Science (CIRES) University of Colorado"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2002-09-01"}],"displaytype":"detail","filename":"KJ00000047990.pdf","filesize":[{"value":"1.7 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000047990","url":"https://nipr.repo.nii.ac.jp/record/6351/files/KJ00000047990.pdf"},"version_id":"b7079b2b-8280-4090-a55a-a60160977652"}]},"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":"Polar mesosphere winter echoes during solar proton events","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Polar mesosphere winter echoes during solar proton events"}]},"item_type_id":"1","owner":"4","path":["806"],"pubdate":{"attribute_name":"公開日","attribute_value":"2002-09-01"},"publish_date":"2002-09-01","publish_status":"0","recid":"6351","relation_version_is_last":true,"title":["Polar mesosphere winter echoes during solar proton events"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:02:40.934372+00:00"}