The NY Times has a detailed article by Justin Gillis about the loss of ice from glaciers, principally in Greenland and the dearth of information about the ice loss as more and more satellites take the plunge. Be sure to check out the interactive graphics. An interesting bit of cleverness is described
Two seismologists, Meredith Nettles and Göran Ekström of Columbia University, discovered a few years ago that unusual earthquakes were emanating from the Greenland glaciers as they dumped the extra ice into the sea. “It’s remarkable that an iceberg can do this, but when that loss of ice occurs, it does generate a signal that sets up a vibration that you can record all across the globe,” Dr. Nettles said in an interview in Greenland.
Analyzing past records, they discovered that these quakes had increased severalfold from the level of the early 1990s, a sign of how fast the ice is changing.
There is just a bit of the usual he said she said, with John Christy doing the obligatory turn of someone who knows a bit about climate but nothing about glaciers saying don't worry, move on, while those who study glaciers
“As a scientist, you have to stick to what you know and what the evidence suggests,” said Gordon Hamilton, one of the researchers in the helicopter. “But the things I’ve seen in Greenland in the last five years are alarming. We see these ice sheets changing literally overnight.”and sea level rise say worry a lot.
So what we have is a lot of observations, models and understanding against one guys gut feeling. Whom should Eli believe, remember this is about betting the bunnies.
Climate scientists readily admit that the three-foot estimate could be wrong. Their understanding of the changes going on in the world’s land ice is still primitive. But, they say, it could just as easily be an underestimate as an overestimate. One of the deans of American coastal studies, Orrin H. Pilkey of Duke University, is advising coastal communities to plan for a rise of at least five feet by 2100.
“I think we need immediately to begin thinking about our coastal cities — how are we going to protect them?” said John A. Church, an Australian scientist who is a leading expert on sea level. “We can’t afford to protect everything. We will have to abandon some areas.”