The Cryosphere, 10, 941–960, 2016 www.the-cryosphere.net/10/941/2016/ doi:10.5194/tc-10-941-2016 © Author(s) 2016. CC Attribution 3.0 License. Evidence of recent changes in the ice regime of lakes in the Canadian High Arctic from spaceborne satellite observations Cristina M. Surdu1, Claude R. Duguay2, and Diego Fernández Prieto1 1Earth Observation Science, Applications and Future Technologies Department, European Space Agency (ESA), European Space Research Institute (ESRIN), Frascati (Rome), Italy 2Department of Geography and Environmental Management and Interdisciplinary Centre on Climate Change, University of Waterloo, Waterloo, Ontario, Canada Correspondence to: Cristina M. Surdu (
[email protected]) and Claude R. Duguay (
[email protected]) Received: 25 September 2015 – Published in The Cryosphere Discuss.: 17 November 2015 Revised: 24 March 2016 – Accepted: 17 April 2016 – Published: 10 May 2016 Abstract. Arctic lakes, through their ice cover phenology, ice cover during the summer of 2009, no residual ice was are a key indicator of climatic changes that the high-latitude observed on any of the other lakes from 2007 to 2011. environment is experiencing. In the case of lakes in the Cana- dian Arctic Archipelago (CAA), many of which are ice cov- ered more than 10 months per year, warmer temperatures could result in ice regime shifts. Within the dominant polar- 1 Introduction desert environment, small local warmer areas have been iden- tified. These relatively small regions – polar oases – with In a rapidly changing climate (Zdanowicz et al., 2012; IPCC, longer growing seasons and greater biological productivity 2013; Lenaerts et al., 2013; Woo and Young, 2014), with and diversity are secluded from the surrounding barren polar each of the last 3 decades being successively warmer than desert.