The photo above was taken flying over southeast Greenland in August 2008. The ocean there is typically full of icebergs. When snow falls in the interior of Greenland, it piles up and the pressure forces the ice (glaciers) outwards towards the sea. When the ice reaches the sea, it calves off into icebergs. Icebergs are just a part of the equilibrium cycle.
Southeast Greenland receives snow almost continuously, so the icebergs keep coming, year in and year out. If they didn’t, the ice in Greenland would be many miles thick.