title: Preface.
authors.affiliation: Grantham Institute, Department of Earth Science and Engineering, Imperial College London, South Kensington, London, UK m.siegert@imperial.ac.uk.
authors.forename: Martin J
authors.initials: MJ
authors.lastname: Siegert
authors.affiliation: Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, USA.
authors.forename: John C
authors.initials: JC
authors.lastname: Priscu
authors.affiliation: Arctic and Antarctic Research Institute, St Petersburg, Russia.
authors.forename: Irina A
authors.initials: IA
authors.lastname: Alekhina
authors.affiliation: School of Geographical Sciences, University of Bristol, Bristol, UK.
authors.forename: Jemma L
authors.initials: JL
authors.lastname: Wadham
authors.affiliation: School of Earth Sciences, Ohio State University, Columbus, OH, USA.
authors.forename: W Berry
authors.initials: WB
authors.lastname: Lyons
keywords: Antarctic; extreme environments; lakes; subglacial