| Publications | | » | Tropical Pacific influence on W. Antarctic marine aerosols, 2013 submitted
 | | » | Thwaites Glacier, Antarctica accumulation, 2013 submitted
| | » | Influence of supraglacial lakes on seasonal ice flow, TCD, in review, 2013
| | » | Greenland Iron Export, Nature Geosc, 2013
| | » | Greenland Organic Carbon Export, GCA, 2013
| | » | Amundsen Coast Sea Ice and Polynya Variability, JGR, 2013
| | » | Ice Core 10Be Records, EPSL, 2012
| | » | Antarctic Ice Sheet Surface Melting, JGR, 2012
| | » | Greenland discharge isotope mixing model, J. Glac., 2011
| | » | Future Science Opportunities in Antarctica and the Southern Ocean, NRC Report, 2011
| | » | Greenland Ice Sheet DOM, GCA, 2010
| | » | Ice Sheet Hydrofracture and Water-transport Model, GRL, 2009
| | » | Greenland Supraglacial Lake Drainage, Science, 2008
| | » | Greenland Seasonal Speedup, Science, 2008
| | » | West Antarctica Holocene Climate, JGR, 2008
| | » | Greenland Accumulation, J. Climate, 2006
| | » | Melt Layer Formation, J. Glac, 2005
| | » | Whillans Ice Stream Deceleration, GRL, 2005
| | » | Siple Dome Temperature Variability, Annals Glac., 2002
| | » | Patagonian Icefield SAR, JGR, 1996
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Joughin, I., S. B. Das, M. A. King, B. E. Smith, I. M. Howat, and T. Moon (2008)
, Seasonal Speedup along the Western Flank of the Greenland Ice Sheet
, Science, doi 10.1126/science.1153288
It has been widely hypothesized that a warmer climate in Greenland would increase the volume of lubricating surface-melt reaching the ice-bedrock interface, accelerating ice flow and increasing mass loss. We have assembled a dataset that provides a synoptic-scale view, spanning ice-sheet to outlet-glacier flow, with which to evaluate this hypothesis. On the ice sheet, these data reveal summer speedups (50-100%) consistent with, but somewhat larger than, earlier observations. The relative speedup of outlet glaciers, however, is far smaller (<15%). Furthermore, the dominant seasonal influence on Jakobshavn Isbrae’s flow is the calving front’s annual advance and retreat. With other effects producing outlet-glacier speedups an order of magnitude larger, seasonal melt’s influence on ice flow is likely confined to those regions dominated by ice-sheet flow.
FILE » Joughinetal2008.pdf
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