Supplement to: Sole, Andrew J; Mair, D W F; Nienow, P W; Bartholomew, I D; King, MA; Burke, M J; Joughin, Ian (2011): Seasonal speedup of a Greenland marine-terminating outlet glacier forced by surface melt–induced changes in subglacial hydrology. Journal of Geophysical Research, 116(F3), F03014, https://doi.org/10.1029/2010JF001948