I know you concern about global warming is sincere and I appreciate the articles you post.
I want to make up my own mind about these issues so I looked at the researcher’s (Steffen) website for more information. He has lots of data on Greenland ice melt but nothing on the total ice volume. Surely he is collecting this information for all of Greenland —the posted article even mentions ice thickening in central Greenland. Why does he never give the total mass balance? Is it increasing or decreasing? Is he afraid his funding will go away if he states the facts? Or his he just dishonest?
The whole global warming movement has a stench to it because its proponents don’t want to deal with the whole truth. Articles like this make me more skeptical, not less.
"The estimates showed that 69 percent of the ice-mass loss in recent years came from eastern Greenland. Of the 57 cubic miles (239 cubic kilometers) of water mass lost on average each year, 39 cubic miles (164 cubic kilometers) were from the eastern shoreline. More than half of that eastern loss involved ice from the glacier complex in southeast Greenland."
There's your number for the whole ice sheet.