1Institute for Marine and Atmospheric research Utrecht, Utrecht University, Utrecht, the Netherlands
2Department of Geography, University of Zurich, Zurich, Switzerland
3Department of Geosciences, University of Fribourg, Fribourg, Switzerland
4Geological Survey of Denmark and Greenland GEUS, Copenhagen, Denmark
5Department of Geoscience & Remote Sensing, Delft University of Technology, Delft, the Netherlands
6Byrd Polar Research Center and School of Earth Sciences, Ohio State University, Columbus, USA
7Department of Geography, University of Liège, Liège, Belgium
Received: 06 Jun 2016 – Published in The Cryosphere Discuss.: 09 Jun 2016
Abstract. This study presents a data set of daily, 1 km resolution Greenland ice sheet (GrIS) surface mass balance (SMB) covering the period 1958–2015. Applying corrections for elevation, bare ice albedo and accumulation bias, the high-resolution product is statistically downscaled from the native daily output of the polar regional climate model RACMO2.3 at 11 km. The data set includes all individual SMB components projected to a down-sampled version of the Greenland Ice Mapping Project (GIMP) digital elevation model and ice mask. The 1 km mask better resolves narrow ablation zones, valley glaciers, fjords and disconnected ice caps. Relative to the 11 km product, the more detailed representation of isolated glaciated areas leads to increased precipitation over the southeastern GrIS. In addition, the downscaled product shows a significant increase in runoff owing to better resolved low-lying marginal glaciated regions. The combined corrections for elevation and bare ice albedo markedly improve model agreement with a newly compiled data set of ablation measurements.
Revised: 23 Aug 2016 – Accepted: 13 Sep 2016 – Published: 13 Oct 2016
Noël, B., van de Berg, W. J., Machguth, H., Lhermitte, S., Howat, I., Fettweis, X., and van den Broeke, M. R.: A daily, 1 km resolution data set of downscaled Greenland ice sheet surface mass balance (1958–2015), The Cryosphere, 10, 2361-2377, doi:10.5194/tc-10-2361-2016, 2016.