 |
| Titel |
Response of the large-scale subglacial drainage system of Northeast Greenland to surface elevation changes |
| VerfasserIn |
N. B. Karlsson, D. Dahl-Jensen |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 9, no. 4 ; Nr. 9, no. 4 (2015-08-06), S.1465-1479 |
| Datensatznummer |
250116828
|
| Publikation (Nr.) |
 copernicus.org/tc-9-1465-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| The influence of subglacial water on the dynamics of ice flow has been the
object of increasing interest in the past decade. In this study we focus on
large-scale, long-term changes in surface elevation over Northeast
Greenland and the corresponding changes in subglacial water routeways. Our
results show that over timescales ranging from decades to millennia the area
may experience redistribution of and fluctuation in subglacial water outflux
under the main glacier outlets. The fluctuations in subglacial water routing
occur even in the absence of external forcing. Based on these results we
conclude that changes in the subglacial water routeways are an intrinsic part
of the drainage basin dynamics, where the subglacial system is likely always
in a transient state. The results also imply that fluctuations at the margins
observed at present might originate from changes several hundred kilometres
upstream. Since surface elevation changes may propagate upstream over
timescales much longer than the observational period, the cause of the
fluctuations may not be present in current observational records. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|