{"created":"2023-07-25T11:09:33.660518+00:00","id":13621,"links":{},"metadata":{"_buckets":{"deposit":"50afb120-6710-4f50-9c07-5a8644669a58"},"_deposit":{"created_by":36,"id":"13621","owners":[36],"pid":{"revision_id":0,"type":"depid","value":"13621"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00013621","sets":[]},"author_link":["44655","44654","44656","44653"],"item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2016-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicPageEnd":"475","bibliographicPageStart":"470","bibliographicVolumeNumber":"10","bibliographic_titles":[{},{"bibliographic_title":"Polar Science","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"New ground penetrating radar (GPR) observations on the Múlajökull surge-type outlet glacier, central Iceland, are presented. Overall 10.5 km of GPR profile lines were recorded parallel to the glacier margin in August, 2015. Detailed GPR investigations combined with high-accuracy GPS measurements allowed to build a high-resolution model of the subglacial topography. We provide new evidence of streamlined ridges beneath Múlajökull’s marginal zone interpreted as drumlins and show the location of the upper edge of the drumlin field. This discovery improves understanding of the location, morphology and development of drumlins as other geophysical observations of subglacial bedforms beneath modern outlet glaciers are quite rare. The location of drumlins corresponds with the position of the major sets of crevasses in the digital elevation model (2008) suggesting the presence of additional drumlins beneath such crevasses in the ice-marginal zone. We suggest this semi-circular pattern of crevasses to be formed due to the variable glacier strain rates created by the subglacial topography. Numerous hyperbolic diffractions representing reflections of englacial channels are found in radar profiles suggesting a well-developed channelized drainage system of a surge-type glacier in its quiescence phase. The calculated thinning of the ice surface in the investigated area (0.65 km2) is on average 17.9 m during 2008–2015.","subitem_description_type":"Abstract"}]},"item_10001_description_6":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"2015年8月に、アルスランド中央のムーラ氷河で、氷河縁とほぼ平行に、新たに全長10.5 kmのGPR（地中レーダー）観測を行い、GPSによる高精度な位置データと合わせ、高解像度の氷河下地形モデルを得た。その結果、ムーラ氷河の縁辺下に氷堆丘と思われる流線形隆起の新たな証拠と、氷堆丘群の上端の位置を示した。現在流出している氷河下の堆積形態に関する他の地球物理学的観測はほとんどなく、この発見は、氷堆丘の位置、形態とその発達に関する知見の向上に寄与する。氷堆丘の位置は、2008年の数値標高データの主要なクレバス位置と一致しており、このことは、氷縁域の同様なクレバス下にも氷堆丘が存在する可能性を示している。クレパスの半円形パターンは、氷河下の地形による氷河の変形率の違いによって生じたものと推測する。レーザー断面に見られる多数の双曲線状の回折は氷河内の水路の反射で、サージタイプ氷河の静止期に発達した排水システムを示す。2008−2015間の調査域（0.65 km2）での氷床面の薄層化は、平均17.9 mと見積もられた。","subitem_description_type":"Other"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"10.1016/j.polar.2016.05.003"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://dx.doi.org/10.1016/j.polar.2016.05.003","subitem_relation_type_select":"DOI"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"18739652","subitem_source_identifier_type":"ISSN"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Lamsters, Kristaps","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"44653","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Karušs, Jānis","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"44654","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Rečs, Agnis","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"44655","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Bērziņš, Dāvids","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"44656","nameIdentifierScheme":"WEKO"}]}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Hofsjökull ice cap","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Subglacial topography","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Ground penetrating radar","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Surge-type glacier","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"Drumlins","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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Detailed subglacial topography and drumlins at the marginal zone of Múlajökull outlet glacier, central Iceland: Evidence from low frequency GPR data","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Detailed subglacial topography and drumlins at the marginal zone of Múlajökull outlet glacier, central Iceland: Evidence from low frequency GPR data"},{"subitem_title":"Detailed subglacial topography and drumlins at the marginal zone of Múlajökull outlet glacier, central Iceland: Evidence from low frequency GPR data","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"36","path":["1741"],"pubdate":{"attribute_name":"公開日","attribute_value":"2016-12-08"},"publish_date":"2016-12-08","publish_status":"0","recid":"13621","relation_version_is_last":true,"title":["Detailed subglacial topography and drumlins at the marginal zone of Múlajökull outlet glacier, central Iceland: Evidence from low frequency GPR data"],"weko_creator_id":"36","weko_shared_id":-1},"updated":"2023-07-25T15:46:53.527648+00:00"}