A Decade of Variability on Jakobshavn Isbrae: Ocean Temperatures Pace Speed Through Influence on Mélange Rigidity

  title={A Decade of Variability on Jakobshavn Isbrae: Ocean Temperatures
Pace Speed Through Influence on M{\'e}lange Rigidity},
  author={Ian R. Joughin and David E. Shean and Ben E. Smith and Dana Floricioiu},
Abstract. The speed of Greenland’s fastest glacier, Jakobshavn Isbrae, has varied substantially since its speedup in the late 1990s. Here we present observations of surface velocity, mélange rigidity, and surface elevation to examine its behaviour over the last decade. Consistent with earlier results, we find a pronounced cycle of summer speedup and thinning followed by winter slowdown and thickening. There were extended periods of rigid mélange in the winters of 2016–17 and 2017–18, concurrent… 

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