An isotopic model for basal freeze-on associated with subglacial upward flow of pore water
Subglacial freezing in polar glaciers can have a significant dynamical effect. Recent studies have shown that freezing of pore water flowing upward through subglacial fine‐grained sediments at the freezing interface and progression of this freezing front downward are responsible for fast ice flow st...
Gespeichert in:
| Veröffentlicht in: | Geophysical research letters 2004-01, Vol.31 (2), p.L02401.1-n/a |
|---|---|
| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | n/a |
|---|---|
| container_issue | 2 |
| container_start_page | L02401.1 |
| container_title | Geophysical research letters |
| container_volume | 31 |
| creator | Souchez, R. Samyn, D. Lorrain, R. Pattyn, F. Fitzsimons, S. |
| description | Subglacial freezing in polar glaciers can have a significant dynamical effect. Recent studies have shown that freezing of pore water flowing upward through subglacial fine‐grained sediments at the freezing interface and progression of this freezing front downward are responsible for fast ice flow stoppage in ice streams. The upward pore water flow leads to the formation of debris‐bearing basal ice layers. A model for stable isotope composition, both in δD and δ18O, is developed for predicting the isotopic composition of the ice segregated by such a mechanism. The development of this isotopic model for water films present along the grains of the subglacial sediment predicts the absence of apparent fractionation for the ice formed. This prediction is tested against two East Antarctic outlet glaciers by studying the δD‐δ18O relationships in the basal ice layers of these glaciers. |
| doi_str_mv | 10.1029/2003GL018861 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_28294216</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>18068062</sourcerecordid><originalsourceid>FETCH-LOGICAL-a4672-6f995608444f3ec4e254fe6c86ab6bc49b2dae3d8134ef5a575fcfab6b78409c3</originalsourceid><addsrcrecordid>eNqFkF9rFDEUxYNY6Fr71g-QF31yNP8myTyWoquwVlpbCn0JmcyNRrObaTLLWD-9WbZYnyxcuJd7f-dwOQidUPKWEta9Y4Tw5YpQrSV9hha0E6LRhKjnaEFIV2em5CF6UcoPUknC6QLdnm5wKGlKY3B4nQaI2KeMe1tsnTLAb2jSBttSkgt2ggHPYfqOy7b_Fm3dRLwdZ5sH7GOacfJ4TBnwXMn8Eh14GwscP_QjdP3h_dXZx2b1Zfnp7HTVWCEVa6TvulYSLYTwHJwA1goP0mlpe9k70fVssMAHTbkA39pWtd753U1pQTrHj9Drve-Y090WymTWoTiI0W4gbYthmnWCUfkkSDWRtVgF3-xBl1MpGbwZc1jbfG8oMbukzb9JV_zVg68tzkaf7caF8qhpW6q5UJVje24OEe7_62mWlyuqFN_90uxFoUzw66_I5p9GKq5ac3O-NJ-luKjx3Jqv_A8Ak5tM</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>18068062</pqid></control><display><type>article</type><title>An isotopic model for basal freeze-on associated with subglacial upward flow of pore water</title><source>Wiley Free Content</source><source>Wiley-Blackwell AGU Digital Library</source><source>EZB-FREE-00999 freely available EZB journals</source><source>Wiley Online Library All Journals</source><creator>Souchez, R. ; Samyn, D. ; Lorrain, R. ; Pattyn, F. ; Fitzsimons, S.</creator><creatorcontrib>Souchez, R. ; Samyn, D. ; Lorrain, R. ; Pattyn, F. ; Fitzsimons, S.</creatorcontrib><description>Subglacial freezing in polar glaciers can have a significant dynamical effect. Recent studies have shown that freezing of pore water flowing upward through subglacial fine‐grained sediments at the freezing interface and progression of this freezing front downward are responsible for fast ice flow stoppage in ice streams. The upward pore water flow leads to the formation of debris‐bearing basal ice layers. A model for stable isotope composition, both in δD and δ18O, is developed for predicting the isotopic composition of the ice segregated by such a mechanism. The development of this isotopic model for water films present along the grains of the subglacial sediment predicts the absence of apparent fractionation for the ice formed. This prediction is tested against two East Antarctic outlet glaciers by studying the δD‐δ18O relationships in the basal ice layers of these glaciers.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2003GL018861</identifier><identifier>CODEN: GPRLAJ</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>basal ice ; Earth, ocean, space ; Exact sciences and technology ; ice segregation ; Isotopic composition ; stable isotopes</subject><ispartof>Geophysical research letters, 2004-01, Vol.31 (2), p.L02401.1-n/a</ispartof><rights>Copyright 2004 by the American Geophysical Union.</rights><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4672-6f995608444f3ec4e254fe6c86ab6bc49b2dae3d8134ef5a575fcfab6b78409c3</citedby><cites>FETCH-LOGICAL-a4672-6f995608444f3ec4e254fe6c86ab6bc49b2dae3d8134ef5a575fcfab6b78409c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2003GL018861$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2003GL018861$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,1433,11513,27923,27924,45573,45574,46408,46467,46832,46891</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15518347$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Souchez, R.</creatorcontrib><creatorcontrib>Samyn, D.</creatorcontrib><creatorcontrib>Lorrain, R.</creatorcontrib><creatorcontrib>Pattyn, F.</creatorcontrib><creatorcontrib>Fitzsimons, S.</creatorcontrib><title>An isotopic model for basal freeze-on associated with subglacial upward flow of pore water</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>Subglacial freezing in polar glaciers can have a significant dynamical effect. Recent studies have shown that freezing of pore water flowing upward through subglacial fine‐grained sediments at the freezing interface and progression of this freezing front downward are responsible for fast ice flow stoppage in ice streams. The upward pore water flow leads to the formation of debris‐bearing basal ice layers. A model for stable isotope composition, both in δD and δ18O, is developed for predicting the isotopic composition of the ice segregated by such a mechanism. The development of this isotopic model for water films present along the grains of the subglacial sediment predicts the absence of apparent fractionation for the ice formed. This prediction is tested against two East Antarctic outlet glaciers by studying the δD‐δ18O relationships in the basal ice layers of these glaciers.</description><subject>basal ice</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>ice segregation</subject><subject>Isotopic composition</subject><subject>stable isotopes</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqFkF9rFDEUxYNY6Fr71g-QF31yNP8myTyWoquwVlpbCn0JmcyNRrObaTLLWD-9WbZYnyxcuJd7f-dwOQidUPKWEta9Y4Tw5YpQrSV9hha0E6LRhKjnaEFIV2em5CF6UcoPUknC6QLdnm5wKGlKY3B4nQaI2KeMe1tsnTLAb2jSBttSkgt2ggHPYfqOy7b_Fm3dRLwdZ5sH7GOacfJ4TBnwXMn8Eh14GwscP_QjdP3h_dXZx2b1Zfnp7HTVWCEVa6TvulYSLYTwHJwA1goP0mlpe9k70fVssMAHTbkA39pWtd753U1pQTrHj9Drve-Y090WymTWoTiI0W4gbYthmnWCUfkkSDWRtVgF3-xBl1MpGbwZc1jbfG8oMbukzb9JV_zVg68tzkaf7caF8qhpW6q5UJVje24OEe7_62mWlyuqFN_90uxFoUzw66_I5p9GKq5ac3O-NJ-luKjx3Jqv_A8Ak5tM</recordid><startdate>200401</startdate><enddate>200401</enddate><creator>Souchez, R.</creator><creator>Samyn, D.</creator><creator>Lorrain, R.</creator><creator>Pattyn, F.</creator><creator>Fitzsimons, S.</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7UA</scope><scope>C1K</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>200401</creationdate><title>An isotopic model for basal freeze-on associated with subglacial upward flow of pore water</title><author>Souchez, R. ; Samyn, D. ; Lorrain, R. ; Pattyn, F. ; Fitzsimons, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4672-6f995608444f3ec4e254fe6c86ab6bc49b2dae3d8134ef5a575fcfab6b78409c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>basal ice</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>ice segregation</topic><topic>Isotopic composition</topic><topic>stable isotopes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Souchez, R.</creatorcontrib><creatorcontrib>Samyn, D.</creatorcontrib><creatorcontrib>Lorrain, R.</creatorcontrib><creatorcontrib>Pattyn, F.</creatorcontrib><creatorcontrib>Fitzsimons, S.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Souchez, R.</au><au>Samyn, D.</au><au>Lorrain, R.</au><au>Pattyn, F.</au><au>Fitzsimons, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>An isotopic model for basal freeze-on associated with subglacial upward flow of pore water</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>2004-01</date><risdate>2004</risdate><volume>31</volume><issue>2</issue><spage>L02401.1</spage><epage>n/a</epage><pages>L02401.1-n/a</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><coden>GPRLAJ</coden><abstract>Subglacial freezing in polar glaciers can have a significant dynamical effect. Recent studies have shown that freezing of pore water flowing upward through subglacial fine‐grained sediments at the freezing interface and progression of this freezing front downward are responsible for fast ice flow stoppage in ice streams. The upward pore water flow leads to the formation of debris‐bearing basal ice layers. A model for stable isotope composition, both in δD and δ18O, is developed for predicting the isotopic composition of the ice segregated by such a mechanism. The development of this isotopic model for water films present along the grains of the subglacial sediment predicts the absence of apparent fractionation for the ice formed. This prediction is tested against two East Antarctic outlet glaciers by studying the δD‐δ18O relationships in the basal ice layers of these glaciers.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2003GL018861</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0094-8276 |
| ispartof | Geophysical research letters, 2004-01, Vol.31 (2), p.L02401.1-n/a |
| issn | 0094-8276 1944-8007 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_28294216 |
| source | Wiley Free Content; Wiley-Blackwell AGU Digital Library; EZB-FREE-00999 freely available EZB journals; Wiley Online Library All Journals |
| subjects | basal ice Earth, ocean, space Exact sciences and technology ice segregation Isotopic composition stable isotopes |
| title | An isotopic model for basal freeze-on associated with subglacial upward flow of pore water |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-08T21%3A54%3A48IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=An%20isotopic%20model%20for%20basal%20freeze-on%20associated%20with%20subglacial%20upward%20flow%20of%20pore%20water&rft.jtitle=Geophysical%20research%20letters&rft.au=Souchez,%20R.&rft.date=2004-01&rft.volume=31&rft.issue=2&rft.spage=L02401.1&rft.epage=n/a&rft.pages=L02401.1-n/a&rft.issn=0094-8276&rft.eissn=1944-8007&rft.coden=GPRLAJ&rft_id=info:doi/10.1029/2003GL018861&rft_dat=%3Cproquest_cross%3E18068062%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=18068062&rft_id=info:pmid/&rfr_iscdi=true |