Seasonal to decadal scale variations in the surface velocity of Jakobshavn Isbrae, Greenland: Observation and model-based analysis

• Published in: Journal of Geophysical Research: Earth Surface Vol. 117; no. F2
• Main Authors: Joughin, Ian, Smith, Ben E., Howat, Ian M., Floricioiu, Dana, Alley, Richard B., Truffer, Martin, Fahnestock, Mark
• Format: Journal Article
• Language: English
• Published: Washington, DC Blackwell Publishing Ltd 01.06.2012; American Geophysical Union
• Subjects: Acceleration; Analysis; Buttresses; Cryosphere; Driving ability; Earth sciences; Earth, ocean, space; Exact sciences and technology; Floating ice; Flotation; Flow resistance; glacier; Glacier retreat; Glaciers; glaciology; ice stream; Satellite observation; Seasonal variation; Seasonal variations; Surface velocity; Thickening; Thinning; Traction; Winter; polar regions; Arctic region; Greenland; troughs; glaciers; satellites; stress; models; Space remote sensing; Summer; Satellite observation; cycles; pressure; Floating ice; acceleration; new data; Thinning; Dynamical evolution; Winter; Flow velocity; geometry; Polar region; flotation; seasonal variations; Thickening

Using new data, we build upon the nearly two‐decade long record of observations from Jakobshavn Isbrae to investigate the processes driving its dynamic evolution. While winter flow speed has not increased substantially over the last three winters, there remains a strong seasonal variation in flow sp...