The research of Alfred Wegener (1880-1930) was closely linked to Greenland, since he hadparticipated in the Danmarks expedition in the years 1906-08 including wintering over atDanmarks Havn, Northeast Greenland. Mass change, movement and ice thickness of theGreenland ice sheet and especially the meteorological and atmospheric conditions over theGreenland ice sheet were in the focus of his work.The Alfred Wegener Institute has been performed research at some of the historic sites andelsewhere in Greenland, however, with todays techniques and has been contributing to ourknowledge about ice-sheet mass balance, ice thickness and movement as well as climatehistory.