ub.xmlui.mirage2.page-structure.muninLogoub.xmlui.mirage2.page-structure.openResearchArchiveLogo
    • EnglishEnglish
    • norsknorsk
  • Velg spraaknorsk 
    • EnglishEnglish
    • norsknorsk
  • Administrasjon/UB
Vis innførsel 
  •   Hjem
  • Fakultet for naturvitenskap og teknologi
  • Institutt for geovitenskap
  • Artikler, rapporter og annet (geovitenskap)
  • Vis innførsel
  •   Hjem
  • Fakultet for naturvitenskap og teknologi
  • Institutt for geovitenskap
  • Artikler, rapporter og annet (geovitenskap)
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Subglacial water storage and drainage beneath the Fennoscandian and Barents Sea ice sheets

Permanent lenke
https://hdl.handle.net/10037/14088
DOI
https://doi.org/10.1016/j.quascirev.2018.10.007
Thumbnail
Åpne
article.pdf (4.353Mb)
Accepted manuscript version (PDF)
Dato
2018-10-17
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Shackleton, Calvin; Patton, Henry; Hubbard, Alun Lloyd; Winsborrow, Monica; Kingslake, Jonathan; Esteves, Mariana da Silveira Ramos; Andreassen, Karin; Greenwood, Sarah L.
Sammendrag
Subglacial hydrology modulates how ice sheets flow, respond to climate, and deliver meltwater, sediment and nutrients to proglacial and marine environments. Here, we investigate the development of subglacial lakes and drainage networks beneath the Fennoscandian and Barents Sea ice sheets over the Late Weichselian. Utilizing an established coupled climate/ice flow model, we calculate high-resolution, spatio-temporal changes in subglacial hydraulic potential from ice sheet build-up (∼37 ka BP) to complete deglaciation (∼10 ka BP). Our analysis predicts up to 3500 potential subglacial lakes, the largest of which was 658 km2, and over 70% of which had surface areas <10 km2, comparable with subglacial lake-size distributions beneath the Antarctic Ice Sheet. Asynchronous evolution of the Fennoscandian Ice Sheet into the flatter relief of northeast Europe affected patterns of subglacial drainage, with up to 100 km3 more water impounded within subglacial lakes during ice build-up compared to retreat. Furthermore, we observe frequent fill/drain cycles within clusters of subglacial lakes at the onset zones and margins of ice streams that would have affected their dynamics. Our results resonate with mapping of large subglacial channel networks indicative of high-discharge meltwater drainage through the Gulf of Bothnia and central Barents Sea. By tracking the migration of meltwater drainage outlets during deglaciation, we constrain locations most susceptible to focussed discharge, including the western continental shelf-break where subglacial sediment delivery led to the development of major trough-mouth fans. Maps of hydraulic potential minima that persist throughout the Late Weichselian reveal potential sites for preserved subglacial lake sediments, thereby defining useful targets for further field-investigation.
Beskrivelse
Accepted manuscript version. Published version available at https://doi.org/10.1016/j.quascirev.2018.10.007. Licensed CC BY-NC-ND 4.0.
Forlag
Elsevier
Sitering
Shackleton, C., Patton, H., Hubbard, A.L., Winsborrow, M., Kingslake, J., Esteves, M.d.S.R., ... Greenwood, S.L. (2018). Subglacial water storage and drainage beneath the Fennoscandian and Barents Sea ice sheets. Quaternary Science Reviews, 201, 13-28. https://doi.org/10.1016/j.quascirev.2018.10.007
Metadata
Vis full innførsel
Samlinger
  • Artikler, rapporter og annet (geovitenskap) [814]

Bla

Bla i hele MuninEnheter og samlingerForfatterlisteTittelDatoBla i denne samlingenForfatterlisteTittelDato
Logg inn

Statistikk

Antall visninger
UiT

Munin bygger på DSpace

UiT Norges Arktiske Universitet
Universitetsbiblioteket
uit.no/ub - munin@ub.uit.no

Tilgjengelighetserklæring