{"created":"2023-07-25T11:01:02.622613+00:00","id":2945,"links":{},"metadata":{"_buckets":{"deposit":"74d91ddb-f453-48ce-8667-bf4beb011ba2"},"_deposit":{"created_by":4,"id":"2945","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"2945"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00002945","sets":["1259:1260:1262:425:430"]},"author_link":["4329"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2002-11","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"52","bibliographicPageStart":"42","bibliographicVolumeNumber":"16","bibliographic_titles":[{"bibliographic_title":"Polar meteorology and glaciology"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Pattyn,  Frank","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":"Recent observations in western Dronning Maud Land, Antarctica, point to a relatively high bedrock roughness in the area of the future EPICA drilling site. It is commonly accepted that such a roughness does not favor the interpretation of deep ice cores as basal ice-sheet interactions might disturb the bottom ice layers. The present study aims at examining the ice-flow characteristics over a strongly undulating bed and investigates its influence on age-depth profiles in the ice sheet.For this purpose a high-resolution time-dependent two-dimensional flowline model was developed (horizontal gridsize ≦ 1km), taking into account all relevant stresses at such a small scale. The model is solved on a fixed finite-difference grid, and compared with a similar model, solving the velocity field according to the shallow-ice approximation. The analysis is presented for sinusoidal bedrock undulations with amplitude-to-wavelength ratio comparable to those observed by radio-echo sounding (D.Steinhage et al., Ann. Glaciol., 29, 267, 1999). Calculations are performed over a period of 300 ka. Results demonstrate that the influence of a high bed roughness on the age-depth profiles is not only confined close to the bed, but near the surface as well, which might affect the interpretation of shallow ice cores.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00002945","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":"AA1129795X","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":"Department of Geography, Vrije Universiteit Brussel"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2002-11-01"}],"displaytype":"detail","filename":"KJ00000043818.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000043818","url":"https://nipr.repo.nii.ac.jp/record/2945/files/KJ00000043818.pdf"},"version_id":"e0810604-f40d-4109-9685-63a3d1e89d29"}]},"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":"Ice-flow characteristics over a rough bedrock: implications for ice-core interpretation","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Ice-flow characteristics over a rough bedrock: implications for ice-core interpretation"}]},"item_type_id":"1","owner":"4","path":["430"],"pubdate":{"attribute_name":"公開日","attribute_value":"2002-11-01"},"publish_date":"2002-11-01","publish_status":"0","recid":"2945","relation_version_is_last":true,"title":["Ice-flow characteristics over a rough bedrock: implications for ice-core interpretation"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:40:11.303804+00:00"}