TY - JOUR
T1 - Thinning and slowdown from Greenland's Mittivakkat Gletscher [PREPRINT]
AU - Mernild, S.H.
AU - Knudsen, N.T.
AU - Hoffman, M.J.
AU - Yde, J.C.
AU - Limpscomb, W.H.
AU - Hanna, E.
AU - Malmros, J.K.
AU - Fausto, R.S.
PY - 2012/10/12
Y1 - 2012/10/12
N2 - Here, we document changes for the Mittivakkat Gletscher, the glacier in Greenland (disconnected to the Greenland Ice Sheet, GrIS) having the longest observed mass balance and surface velocity time series (since 1995). Between 1986 and 2011, this glacier decreased by 15% in mean ice thickness and 30% in volume. We attribute these changes to summer warming and less winter snowfall. The vertical strain was able to compensate about 60% of the elevation change due to surface mass balance (SMB) in the lower part, and about 25% in the upper part. The annual mean ice surface velocity decreased by 30%, likely as a dynamic effect of ice thinning. Mittivakkat Gletscher summer surface velocities were on average 50–60% above winter background values, and up to 160% higher during peak velocity events.
AB - Here, we document changes for the Mittivakkat Gletscher, the glacier in Greenland (disconnected to the Greenland Ice Sheet, GrIS) having the longest observed mass balance and surface velocity time series (since 1995). Between 1986 and 2011, this glacier decreased by 15% in mean ice thickness and 30% in volume. We attribute these changes to summer warming and less winter snowfall. The vertical strain was able to compensate about 60% of the elevation change due to surface mass balance (SMB) in the lower part, and about 25% in the upper part. The annual mean ice surface velocity decreased by 30%, likely as a dynamic effect of ice thinning. Mittivakkat Gletscher summer surface velocities were on average 50–60% above winter background values, and up to 160% higher during peak velocity events.
U2 - 10.5194/tcd-6-4387-2012
DO - 10.5194/tcd-6-4387-2012
M3 - Article
VL - 6
SP - 4387
EP - 4415
JO - The Cryosphere Discussions
JF - The Cryosphere Discussions
ER -