Deutsch
 
Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

 
 
DownloadE-Mail
  Rapid development and persistence of efficient subglacial drainage under 900 m-thick ice in Greenland

Chandler, D. M., Wadham, J. L., Nienow, P. W., Doyle, S. H., Tedstone, A. J., Telling, J., Hawkings, J., Alcock, J. D., Linhoff, B., Hubbard, A. (2021): Rapid development and persistence of efficient subglacial drainage under 900 m-thick ice in Greenland. - Earth and Planetary Science Letters, 566, 116982.
https://doi.org/10.1016/j.epsl.2021.116982

Item is

Dateien

einblenden: Dateien
ausblenden: Dateien
:
5007347.pdf (Verlagsversion), 3MB
Name:
5007347.pdf
Beschreibung:
-
Sichtbarkeit:
Öffentlich
MIME-Typ / Prüfsumme:
application/pdf / [MD5]
Technische Metadaten:
Copyright Datum:
-
Copyright Info:
-

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Chandler, David M.1, Autor
Wadham, Jemma L.1, Autor
Nienow, Peter W.1, Autor
Doyle, Samuel H.1, Autor
Tedstone, Andrew J.1, Autor
Telling, Jon1, Autor
Hawkings, Jonathan2, Autor              
Alcock, Jonathan D.1, Autor
Linhoff, Benjamin1, Autor
Hubbard, Alun1, Autor
Affiliations:
1External Organizations, ou_persistent22              
23.5 Interface Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum, ou_754888              

Inhalt

einblenden:
ausblenden:
Schlagwörter: -
 Zusammenfassung: Intensive study of the Greenland Ice Sheet's (GrIS) subglacial drainage has been motivated by its importance for ice dynamics and for nutrient/sediment export to coastal ecosystems. This has revealed consistent seasonal development of efficient subglacial drainage in the lower ablation area. While some hydrological models show qualitative agreement with field data, conflicting evidence (both field- and model-based) maintains uncertainty in the extent and rate of efficient drainage development under thick (∼1 km) ice. Here, we present the first simultaneous time series of directly-observed subglacial drainage evolution, supraglacial hydrology and ice dynamics over 11 weeks in a large GrIS catchment. We demonstrate development of a fast/efficient subglacial drainage system extending from the margin to beneath ice >900 m thick, which then persisted with little response to highly variable moulin inputs including extreme melt events and extended periods (2 weeks) of low melt input. This efficient system evolved within ∼3 weeks at a moulin initiated when a fracture intersected a supraglacial river (rather than hydrofracture and lake drainage). Ice flow response to surface melt inputs at this site follows a pattern commonly observed in the lower GrIS ablation area, and by assuming a strong relationship between ice dynamics and subglacial hydrology, we infer that efficient subglacial drainage evolution is widespread under 900 m-thick ice in west Greenland. This time series of tracer transit characteristics through a developing and then persistent efficient drainage system provides a unique data set with which to validate and constrain existing numerical drainage system models, extending their capability for simulating drainage system evolution under current and future conditions.

Details

einblenden:
ausblenden:
Sprache(n):
 Datum: 20212021
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.epsl.2021.116982
GFZPOF: p4 T5 Future Landscapes
OATYPE: Hybrid Open Access
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: Earth and Planetary Science Letters
Genre der Quelle: Zeitschrift, SCI, Scopus
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: 566 Artikelnummer: 116982 Start- / Endseite: - Identifikator: ISSN: 0012-821X
ISSN: 1385-013X
CoNE: https://gfzpublic.gfz-potsdam.de/cone/journals/resource/journals99
Publisher: Elsevier