Twenty-one years of mass balance observations along the K-transect, West Greenland

A 21-yr record is presented of surface mass balance measurements along the K-transect. The series covers the period 1990-2011. Data are available at eight sites along a transect over an altitude range of 380-1850 m at approximately 67 degrees N in West Greenland. The surface mass balance gradient is on average 3.8 x 10(-3) m w.e. m(-1), and the mean equilibrium line altitude is 1553 m a.s.l. Only the lower three sites within 10 km of the margin up to an elevation of 700 m experience a significant increasing trend in the ablation over the entire period. Data are available at: doi:10.1594/PANGAEA.779181.