Flow modulation by ocean tides at Helheim Glacier, East Greenland, observed using GPS

(1) Institute for Space Sciences, CSIC/IEEC, Spain (dejuan@ice.csic.es), (2) Lamont-Doherty Earth Observatory of Columbia University, USA, (3) Harvard-Smithsonian Center for Astrophysics, USA, (4) Geological Survey of Denmark and Greenland, Denmark, (5) Danish National Space Center, Denmark, (6) Climate Change Institute, University of Maine, USA, (7) Center for Remote Sensing of Ice Sheets, University of Kansas, USA