Surface elevation changes during 2007-13 on Bowdoin and Tugto Glaciers, northwestern Greenland

To quantify recent thinning of marine-terminating outlet glaciers in northwestern Greenland, we carried out field and satellite observations near the terminus of Bowdoin Glacier. These data were used to compute the change in surface elevation from 2007 to 2013 and this rate of thinning was then compared with that of the adjacent land-terminating Tugto Glacier. Comparing DEMs of 2007 and 2010 shows that Bowdoin Glacier is thinning more rapidly (4.1 +/- 0.3 m a(-1)) than Tugto Glacier (2.8 +/- 0.3 m a(-1)). The observed negative surface mass-balance accounts for