caa a22 4500 605471185 CHVBK 20210128100331.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00382-014-2226-1 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2226-1 Is global warming affecting cave temperatures? Experimental and model data from a paradigmatic case study [Elektronische Daten] [David Domínguez-Villar, Sonja Lojen, Kristina Krklec, Andy Baker, Ian Fairchild] This research focuses on the mechanisms that transfer the variations in surface atmospheric temperature into caves to evaluate whether they record the warming trend of recent decades. As a study case, we use the data from a hall in Postojna Cave (Slovenia), which was monitored from 2009 to 2013. The low-frequency thermal variability of this cave chamber is dominated by the conduction of heat from the surface through the bedrock. We implemented a thermal conduction model that reproduces low-frequency thermal gradients similar to those measured in the cave. At the 37m depth of this chamber, the model confirms that the bedrock is already recording the local expression of global warming with a delay of 20-25years, and predicts a cave warming during the coming decades with a mean rate of 0.015±0.004Cyear−1. However, because of the transfer of surface atmosphere thermal variability depends on the duration of the oscillations, the thermal anomalies with periods 7-15years in duration have delay times <10years at the studied hall. The inter-annual variability of the surface atmospheric temperature is recorded in this cave hall, although due to the different delay and amplitude attenuation that depends on the duration of the anomalies, the cave temperature signal differs significantly from that at the surface. As the depth of the cave is a major factor in thermal conduction, this is a principal control on whether or not a cave has already recorded the onset of global warming. Springer-Verlag Berlin Heidelberg, 2014 Global warming nationallicence Cave nationallicence Temperature nationallicence Heat conduction nationallicence Postojna nationallicence Domínguez-Villar David Centro Nacional de Investigación sobre la Evolución Humana, Paseo Sierra de Atapuerca s/n, 09002, Burgos, Spain aut Lojen Sonja Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia aut Krklec Kristina Department of Soil Science, Faculty of Agriculture, University of Zagreb, Svetošimunska 25, 10000, Zagreb, Croatia aut Baker Andy Connected Waters Initiative Research Centre, University of New South Wales, 110 King St. Manly Vale, 2093, Sydney, NSW, Australia aut Fairchild Ian School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut Climate Dynamics Springer Berlin Heidelberg 45/3-4(2015-08-01), 569-581 0930-7575 45:3-4<569 2015 45 382 https://doi.org/10.1007/s00382-014-2226-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2226-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Domínguez-Villar David Centro Nacional de Investigación sobre la Evolución Humana, Paseo Sierra de Atapuerca s/n, 09002, Burgos, Spain aut NATIONALLICENCE 700 1- Lojen Sonja Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia aut NATIONALLICENCE 700 1- Krklec Kristina Department of Soil Science, Faculty of Agriculture, University of Zagreb, Svetošimunska 25, 10000, Zagreb, Croatia aut NATIONALLICENCE 700 1- Baker Andy Connected Waters Initiative Research Centre, University of New South Wales, 110 King St. Manly Vale, 2093, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Fairchild Ian School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, Birmingham, UK aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/3-4(2015-08-01), 569-581 0930-7575 45:3-4<569 2015 45 382