 |
| Titel |
Evolution of surface velocities and ice discharge of Larsen B outlet glaciers from 1995 to 2013 |
| VerfasserIn |
J. Wuite, H. Rott, M. Hetzenecker, D. Floricioiu, J. De Rydt, G. H. Gudmundsson, T. Nagler, M. Kern |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1994-0416
|
| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 9, no. 3 ; Nr. 9, no. 3 (2015-05-09), S.957-969 |
| Datensatznummer |
250116795
|
| Publikation (Nr.) |
 copernicus.org/tc-9-957-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| We use repeat-pass SAR data to produce detailed maps of surface motion
covering the glaciers draining into the former Larsen B Ice Shelf, Antarctic
Peninsula, for different epochs between 1995 and 2013. We combine the
velocity maps with estimates of ice thickness to analyze fluctuations of ice
discharge. The collapse of the central and northern sections of the ice
shelf in 2002 led to a near-immediate acceleration of tributary glaciers as
well as of the remnant ice shelf in Scar Inlet. Velocities of most of the
glaciers discharging directly into the ocean remain to date well above the
velocities of the pre-collapse period. The response of individual glaciers
differs and velocities show significant temporal fluctuations, implying
major variations in ice discharge as well. Due to reduced velocity and ice
thickness the ice discharge of Crane Glacier decreased from 5.02 Gt a−1
in 2007 to 1.72 Gt a−1 in 2013, whereas Hektoria and Green glaciers
continue to show large temporal fluctuations in response to successive
stages of frontal retreat. The velocity on Scar Inlet ice shelf increased 2–3-fold since 1995, with the largest increase in the first years
after the break-up of the main section of Larsen B. Flask and Leppard
glaciers, the largest tributaries to Scar Inlet ice shelf, accelerated. In
2013 their discharge was 38% and 46% higher than in 1995. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|