Articles | Volume 15, issue 7
The Cryosphere, 15, 3355–3375, 2021
https://doi.org/10.5194/tc-15-3355-2021
The Cryosphere, 15, 3355–3375, 2021
https://doi.org/10.5194/tc-15-3355-2021

Research article 21 Jul 2021

Research article | 21 Jul 2021

Surges of Harald Moltke Bræ, north-western Greenland: seasonal modulation and initiation at the terminus

Lukas Müller et al.

Data sets

A processing system to monitor Greenland outlet glacier velocity variations at decadal and seasonal time scales utilizing the Landsat imagery (https://data1.geo.tu-dresden.de/flow_velocity/download.shtml) R. Rosenau, M. Scheinert, and R. Dietrich https://doi.org/10.1016/j.rse.2015.07.012

Programme for monitoring of the Greenland ice sheet (PROMICE): Greenland ice velocity A. Solgaard and A. Kusk https://doi.org/10.10.22008/PROMICE/DATA/SENTINEL1ICEVELOCITY/GREENLANDICESHEET/V1.0.0

MEaSUREs Greenland Ice Velocity: Selected Glacier Site Velocity Maps from InSAR I. Joughin, I. M. Howat, B. E. Smith, and T. Scambos https://doi.org/10.5067/YXMJRME5OUNC

BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Mulibeam Echo Sounding Combined Wicht Mass Conservation M. Morlighem, C. N. Williams, E. Rignot, L. An, J. E. Arndt, J. L. Bamber, G. Catania, N. Chauché, A. Dowdeswell, B. Dorschel, I. Fenty, K. Hogan, I. Howat, A. Hubbard, M. Jakobsson, T. M. Jordan, K. K. Kjeldsen, R. Millan, L. Mayer, J. Mouginot, B. P. Y. Noël, C. O'Cofaigh, S. Palmer, H. Rysgaard, H. Seroussi, M. J. Siegert, P. Slabon, F. Straneo, M. R. van de Broeke, W. Weinrebe, M. Wood, and K. B. Zinglersen https://doi.org/10.1002/2017GL074954

IceBridge BedMachine Greenland M. Morlighem, C. N. Williams, E. Rignot, L. An, J. E. Arndt, J. L. Bamber, G. Catania, N. Chauché, A. Dowdeswell, B. Dorschel, I. Fenty, K. Hogan, I. Howat, A. Hubbard, M. Jakobsson, T. M. Jordan, K. K. Kjeldsen, R. Millan, L. Mayer, J. Mouginot, B. P. Y. Noël, C. O'Cofaigh, S. Palmer, H. Rysgaard, H. Seroussi, M. J. Siegert, P. Slabon, F. Straneo, M. R. van de Broeke, W. Weinrebe, M. Wood, and K. B. Zinglersen https://doi.org/10.5067/VLJ5YXKCNGXO

IceBridge MCoRDS L1B Geolocated Radar Echo Strength Profiles J. Paden, J. Li, C. Leuschen, F. Rodriguez-Morales, and R. Hale https://doi.org/10.5067/90S1XZRBAX5N

Rapid ablation zone expansion amplifies north Greenland mass loss: modelled (RACMO2) and observed (MODIS) data sets B. P. Y. Noël https://doi.org/10.1594/PANGAEA.904428

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Short summary
Harald Moltke Bræ, a marine-terminating glacier in north-western Greenland, undergoes remarkable surges of episodic character. Our data show that a recent surge from 2013 to 2019 was initiated at the glacier front and exhibits a pronounced seasonality with flow velocities varying by 1 order of magnitude, which has not been observed at Harald Moltke Bræ in this way before. These findings are crucial for understanding surge mechanisms at Harald Moltke Bræ and other marine-terminating glaciers.