Supplement to: Bokhorst, Stef; Huiskes, Ad H L; Convey, Peter; Sinclair, Brent J; Lebouvier, Marc; Van de Vijver, Bart; Wall, Diana H (2011): Microclimate impacts of passive warming methods in Antarctica: implications for climate change studies. Polar Biology, 34(10), 1421-1435, https://doi.org/10.1007/s00300-011-0997-y