Reference : The Effect of Foehn‐Induced Surface Melt on Firn Evolution Over the Northeast Antarct...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/234386
The Effect of Foehn‐Induced Surface Melt on Firn Evolution Over the Northeast Antarctic Peninsula
English
Datta, R.T. [> >]
Tedesco, M. [> >]
Fettweis, Xavier mailto [Université de Liège - ULiège > Département de géographie > Climatologie et Topoclimatologie >]
Agosta, Cécile mailto [> >]
Lhermitte, S. [> >]
Lenaerts, J. [> >]
Wever, N. [> >]
11-Apr-2019
Geophysical Research Letters
Wiley
46
Yes (verified by ORBi)
International
0094-8276
1944-8007
Washington
DC
[en] Surface meltwater ponding has been implicated as a major driver for recent ice shelf collapse as well as the speedup of tributary glaciers in the northeast Antarctic Peninsula. Surface melt on the NAP is impacted by the strength and frequency of westerly winds, which result in sporadic foehn flow. We estimate changes in the frequency of foehn flow and the associated impact on snow melt, density, and the percolation depth of meltwater over the period 1982–2017 using a regional climate model and passive microwave data. The first of two methods extracts spatial patterns of melt occurrence using empirical orthogonal function analysis. The second method applies the Foehn Index, introduced here to capture foehn occurrence over the full study domain. Both methods show substantial foehn‐induced melt late in the melt season since 2015, resulting in compounded densification of the near‐surface snow, with potential implications for future ice shelf stability.
http://hdl.handle.net/2268/234386
10.1029/2018GL080845
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL080845

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