{"created":"2023-07-25T11:03:28.710028+00:00","id":6381,"links":{},"metadata":{"_buckets":{"deposit":"8b80aef6-36d3-4e05-9fa2-cfe1b79a3c2a"},"_deposit":{"created_by":4,"id":"6381","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"6381"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00006381","sets":["1259:1260:1261:802:808"]},"author_link":["1752","35622","35621","35620"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2004-08","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"76","bibliographicPageStart":"65","bibliographicVolumeNumber":"18","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":"Hayakawa, Masashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Molchanov, Oleg A.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Schekotov, Alexander Yu.","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Fedorov, Evgeny","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":"This paper intends to report on the statistical results on the spectral resonance structures of the ionospheric Alfven resonances (IAR) in the ULF frequency range 0.1-5.0 Hz on the basis of the analysis of long-term data obtained from July 2000 to December 2002 (2.5 years) at the Karimshino station (Kamchatka, Russia) (L=2.1) by the conventional 3-component search-coil magnetometer. We analyze both the dynamic spectra of three components and polarization spectra in order to distinguish IAR from other possible noises. The average frequency difference _F between the adjacent maxima, intensity and occurrence rate of the IAR spectra have been estimated from the averaged spectra. Early papers at middle latitudes have been based on a small data base. Based on our first long-term observation at middle latitude, new findings, especially related to the seasonal variation, have emerged from this analysis. (1) There is an evident seasonal variation in the occurrence rate with a maximum in the September-January period and an almost complete absence of IAR structures in the spring-early summer time. (2) Occurrence maximum in the diurnal variation is found at 21-23 LT in the autumn and winter. Almost all the IAR structures are observed at local nighttime. (3) The averaged _F is found to be about 0.2-0.5 Hz in the autumn period but it seems to increase up to 0.5-0.7 Hz in winter. (4) The IAR occurrence rate is inversely correlated with the Kp index of global magnetic activity. (5) The intensity of D component exceeds essentially that of H component of the IAR structures in a majority of cases. Diurnal variations of resonance frequencies in the H and D components are not always identical. Finally the mechanisms to explain the observed characteristics of the IAR have been discussed.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00006381","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":"University of Electro-Communications"},{"subitem_text_language":"en","subitem_text_value":"Institute of Physics of the Earth, Russian Academy of Science"},{"subitem_text_language":"en","subitem_text_value":"Institute of Physics of the Earth, Russian Academy of Science"},{"subitem_text_language":"en","subitem_text_value":"Institute of Physics of the Earth, Russian Academy of Science"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2004-08-01"}],"displaytype":"detail","filename":"KJ00000729600.pdf","filesize":[{"value":"769.1 kB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000729600","url":"https://nipr.repo.nii.ac.jp/record/6381/files/KJ00000729600.pdf"},"version_id":"317bce80-4f5a-4036-bb29-9a7815853ade"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ionospheric Alfven resonator (IAR)","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"ionosphere","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"magnetosphere","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"polarization","subitem_subject_language":"en","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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Observation of ionospheric Alfven resonance at a middle latitude station","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Observation of ionospheric Alfven resonance at a middle latitude station"}]},"item_type_id":"1","owner":"4","path":["808"],"pubdate":{"attribute_name":"公開日","attribute_value":"2004-08-01"},"publish_date":"2004-08-01","publish_status":"0","recid":"6381","relation_version_is_last":true,"title":["Observation of ionospheric Alfven resonance at a middle latitude station"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:02:17.399142+00:00"}