Satellite-based estimates of Antarctic surface meltwater fluxes
Text S1. A description of the satellite-based melt detection and surface energy balance modeling methods (10.26Kb)
Mean annual surface melt fluxes across Dronning Maud Land ice shelves from (A) QSCAT and (B) RACMO with locations referred to in the text labeled (2.404Mb)
Examination of the 2004–2005 melt season at Neumayer Station using observations, an SEB model, QSCAT, and RACMO (2.479Mb)
Profiles from the Larsen C ice shelf (LCIS; see Figure 4) showing annual and mean (1999–2009) melt fluxes from (A) QSCAT and (B) RACMO. (730.7Kb)
(A) Areas of meltwater ponding (blue) across the Larsen Ice Shelf observed using visible Landsat imagery spanning 2001-2011. (B) Elongate surface melt features in Cabinet Inlet observed by Landsat 7 ETM in February 2006 (location shown in A). (5.946Mb)
Trusel, Luke D.
Frey, Karen E.
Das, Sarah B.
Munneke, Peter Kuipers
van den Broeke, Michiel R.
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This study generates novel satellite-derived estimates of Antarctic-wide annual (1999–2009) surface meltwater production using an empirical relationship between radar backscatter from the QuikSCAT (QSCAT) satellite and melt calculated from in situ energy balance observations. The resulting QSCAT-derived melt fluxes significantly agree with output from the regional climate model RACMO2.1 and with independent ground-based observations. The high-resolution (4.45 km) QSCAT-based melt fluxes uniquely detect interannually persistent and intense melt (>400 mm water equivalent (w.e.) year−1) on interior Larsen C Ice Shelf that is not simulated by RACMO2.1. This supports a growing understanding of the importance of a föhn effect in this region and quantifies the resulting locally enhanced melting that is spatially consistent with recently observed Larsen C thinning. These new results highlight important cryosphere-climate interactions and processes that are presently not fully captured by the coarser-resolution (27 km) regional climate model.
Author Posting. © American Geophysical Union, 2013. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 40 (2013): 6148–6153, doi:10.1002/2013GL058138.
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