Satellites have long been used to track ice extent (area), but calculating the thickness of the marine floes requires the overflying spacecraft to gauge the difference between the top of the ice surface and the top of the water - a relatively simple calculation then gives the overall volume.

BBC: Launch success for Esa's Cryosat-2 ice mission

One area where JPM fell short was in calculating the income of homeowners accurately.

FORBES: Treasury Singles Out JPMorgan As Worst Mortgage Servicer Under Federal Program

The ranking was determined by calculating the number of job postings per thousand people in each major U.S. metropolitan area.

FORBES: The Easiest and Hardest Cities for Finding a Job

"I don't know why otherwise cool and calculating people lose their heads in the mountains, but they do, " says Richard Kahl, editor of Ski Area Management magazine.

FORBES: Ski Mogul