The Cryosphere www.the-cryosphere.net 1994-0416 1994-0424 3 1 2009 10.5194/tc-3-133-2009 http://www.the-cryosphere.net/3/133/2009/ http://www.the-cryosphere.net/3/133/2009/tc-3-133-2009.html http://www.the-cryosphere.net/3/133/2009/tc-3-133-2009.pdf 133 145 2009-05-26 Evaluation of the ground surface Enthalpy balance from bedrock temperatures (Livingston Island, Maritime Antarctic) M. Ramos miguel.ramos@uah.es G. Vieira Department of Physics, University of Alcalá, 28871 Alcalá de Henares, Spain Centre for Geographical Studies/Department of Geography, University of Lisbon, 1600-214 Lisbon, Portugal The annual evolution of the ground temperatures from Incinerador borehole in Livingston Island (South Shetlands, Antarctic) is studied. The borehole is 2.4 m deep and is located in a massive quartzite outcrop with negligible water content, in the proximity of the Spanish Antarctic Station Juan Carlos I. In order to model the movement of the 0°C isotherm (velocity and maximum depth) hourly temperature profiles from: (i) the cooling periods of the frost season of 2000 to 2005, and (ii) the warming periods of the thaw season of 2002–2003, 2003–2004 and 2004–2005, were studied. In this modelling approach, heat gains and losses across the ground surface are assumed to be the causes for the 0°C isotherm movement. A methodological approach to calculate the ground Enthalpy change based on the thermodynamic analysis of the ground during the cooling and warming periods is proposed. The Enthalpy change into the rock is equivalent to the heat exchange through the ground surface during each season, thus enabling to describe the interaction ground-atmosphere and providing valuable data for studies on permafrost and periglacial processes. 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