A simplified method to estimate the run-off in Periglacial Creeks: A case study of King George Islands, Antarctic Peninsula

• Language: unknown
• Published: 2018
• Subjects: Antarctic Peninsula; Climatic change; Glacial discharge; Permafrost hydrology; Run-off; Atmospheric temperature; Catchments; Fourier analysis; Glacial geology; Runoff; Sea level; Climatic changes; Field observations; Global sea level rise; Meteorological condition; Northern Hemispheres; Surface air temperatures; Monte Carlo methods; Antarctic; George Islands; King George Island; King George Islands; Potter Peninsula; The Antarctic; Antarc*; Antarctica; permafrost
• Online Access: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1364503X_v376_n2122_p_Falk; https://hdl.handle.net/20.500.12110/paper_1364503X_v376_n2122_p_Falk

Although the relationship between surface air temperature and glacial discharge has been studied in the Northern Hemisphere for at least a century, similar studies for Antarctica remain scarce and only for the past four decades. This data scarcity is due to the extreme meteorological conditions and terrain inaccessibility. As a result, the contribution of glacial discharge in Antarctica to global sea-level rise is still attached with great uncertainties, especially from partly glaciated hydrological basins as can be found in the Antarctic Peninsula. In this paper, we propose a simplified model based on the Monte Carlo method and Fourier analysis for estimating discharge in partly glaciated and periglacial hydrological catchments with a summer melt period. Our model offers the advantage of scarce data requirements and quick recognition of periglacial environments. Discharge was found to be highly correlated with surface air temperature for the partially glaciated hydrological catchments on Potter Peninsula, King George Island (Isla 25 Mayo). The model is simple to implement and requires few variables to make most versatile simulations. We have obtained a monthly simulated maximum flow estimates between 0.74 and 1.07 m3 s-1 for two creeks (South and North Potter) with a very good fit to field observations. The glacial mean monthly discharge during summermonths was estimated to 0.44 ± 0.02m3 s-1 for South Potter Creek and 0.55 ± 0.02m3 s-1 for North Potter Creek. This article is part of the theme issue 'The marine system of the West Antarctic Peninsula: status and strategy for progress in a region of rapid change'. © 2018 The Authors.