HR: 09:00h
AN: C41A-05    [Abstracts]
TI: Recent Flow Velocities at the Front of Jakobshavn Isbrae/Greenland from 2004 Field Observations
AU: * Dietrich, R
EM: dietrich@ipg.geo.tu-dresden.de
AF: TU Dresden Institut für Planetare Geodäsie, Helmholtzstr. 10, Dresden, 01062 Germany
AU: Maas, H
EM: hans-gerd.maas@tu-dresden.de
AF: TU Dresden Institut für Photogrammetrie und Fernerkundung, Helmholtzstr. 10, Dresden, 01062 Germany
AU: Baessler, M
EM: baessler@ipg.geo.tu-dresden.de
AF: TU Dresden Institut für Planetare Geodäsie, Helmholtzstr. 10, Dresden, 01062 Germany
AU: Rülke, A
EM: ruelke@ipg.geo.tu-dresden.de
AF: TU Dresden Institut für Planetare Geodäsie, Helmholtzstr. 10, Dresden, 01062 Germany
AU: Schwalbe, E
EM: ellen.schwalbe@tu-dresden.de
AF: TU Dresden Institut für Photogrammetrie und Fernerkundung, Helmholtzstr. 10, Dresden, 01062 Germany
AB: The Jakobshavn Isbrae is one of the most dynamic tidewater glaciers of the Greenland ice sheet. For the recent time a remarkable retreat of the ice front and an increasing flow velocity have been reported. In August 2004, geodetic field work was carried out next to the present front position of the Jakobshavn Isbrae. With ground-based observations the flow velocity field for the area of the ice front up to 5 km upstream was determined. The observation concept and the data analysis will be described in detail. The obtained velocities range up to 40 m/day, which supports recently published findings based on satellite remote sensing data. Compared to observations performed 20 years ago the flow velocities increased almost by a factor of 2. The consequences for the mass balance of the Jakobshavn Isbrae and its catchment area will be discussed.
DE: 0700 CRYOSPHERE (4540)
DE: 0720 Glaciers
DE: 0762 Mass balance (1218, 1223)
DE: 0774 Dynamics
DE: 0776 Glaciology (1621, 1827, 1863)
SC: Cryosphere [C]
MN: Fall Meeting 2005