Fig. 1.

Observed vertical velocities (in mm/yr) of the GNET stations in southeast Greenland. These velocities, their uncertainties (< 1 mm/yr), and the observational time spans are listed in SI Appendix, Table S1. When a station’s velocity estimate is known to have been very strongly affected by the 2010 ice loss anomaly (as at station SENU), the velocity label is marked *. However, there is no way to know the extent to which the 2010 anomaly has affected the GNET stations established in 2009. Some of the longer-lived GPS stations such as KULU have recorded major changes in uplift rate throughout their lifetimes, in which case their average vertical velocity since the beginning of year 2000 is given, and this velocity is marked with a V to indicate multiyear variability. Note that station symbols encode their installation dates. The highest uplift rates observed so far anywhere in Greenland are those at stations MIK2 and KUAQ; however, it seems likely that these rates were perturbed upwards by the 2010 melting anomaly, and do not represent the average uplift rates over the several years prior to 2010.