Reply to Uxa (2016) Discussion on Active Layer Thickness Prediction on the Western Antarctic Peninsula by Wilhelm et al. (2015)

Uxa () used alternative assumptions to calculate active‐layer thicknesses (ALTs) on Amsler Island, Western Antarctic Peninsula, and concluded that assumptions in Wilhelm et al. () overestimate ALTs in the region. Here, we accept that the core of his argument is correct, but we contend that observati...

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Bibliographic Details
Published in:Permafrost and Periglacial Processes
Main Authors: Kelly Wilhelm, James Bockheim
Format: Article in Journal/Newspaper
Language:unknown
Subjects:
Amsler Island
Antarctic
Antarctic Peninsula
Antarc*
Online Access:https://doi.org/10.1002/ppp.1923
Description
Summary:Uxa () used alternative assumptions to calculate active‐layer thicknesses (ALTs) on Amsler Island, Western Antarctic Peninsula, and concluded that assumptions in Wilhelm et al. () overestimate ALTs in the region. Here, we accept that the core of his argument is correct, but we contend that observations using multiple devices, along with the HYDRUS model, indicate that in some cases assumptions used by Uxa () overcompensate and predict an unrealistically thin active layer for the study area. Observed and predicted ALTs are much greater than would be expected, relative to measurements farther to the north. Such a thick active layer could be due to glacial proximity and topographically controlled hydraulic features that promote wetter‐than‐expected soils. Copyright © 2016 John Wiley & Sons, Ltd.

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