Annual layer thicknesses and age-depth (oldest estimate) of Derwael Ice Rise (IC12), Dronning Maud Land, East Antarctica: Supplement to: Philippe, M et al. (2016): Ice core evidence for a 20th century increase in surface mass balance in coastal Dronning Maud Land, East Antarctica. The Cryosphere, 10(5), 2501-2516, doi:10.5194/tc-10-2501-2016