Relatives of Philip Goodeve-Docker have paid tribute to him in a Facebook post:
We wanted to let everyone know that on Sunday morning we had a phone call to confirm that Philip sadly died.
To our son, brother and friend, we are so glad that you were on your adventure and expedition that you had wanted to do for so long. You will be unbelievably missed and your memory cherished. xx
The 30-year-old charity promoter from Ealing, London, was said to be "on the expedition of his lifetime" with two friends in Greenland, when the group got into difficulty on Sunday.
More top news
The wild animal is said to have killed at least one person and injured several. It was captured on camera by stunned onlookers.
Tiger Woods has dropped out of the world's top 100 golfers for the first time since 1996
Police e-fit software been used to create the faces of the most beautiful man and woman in the world.