If ice falls are happening, those bridges could be closed temporarily, the spokeswoman said.

WSJ: Officials Urge Caution as Snow Starts Falling

Something happens to your sense of time here: It compresses like the crystals of blue ice, then falls away like a calving glacier.

FORBES: Go with the Floe

To assess the contribution from melting ice sheets, scientists try to measure "mass balance, " which is the difference between the annual snow that falls on the permanent ice sheets each year, and the total mass of ice that melts or breaks off the sheets.

WSJ: Polar Ice Sheets Melt at Faster Pace