OIB

For eleven years from 2009 through 2019, the planes of NASA’s Operation IceBridge flew above the Arctic, Antarctic and Alaska, gathering data on the height, depth, thickness, flow and change of sea ice, glaciers and ice sheets.

Greenland’s melting ice sheet could generate more sea level rise than previously thought if greenhouse gas emissions continue to increase and warm the atmosphere at their current rate, according to a new modeling study. The study, which used data from NASA’s Operation IceBridge airborne campaign, was published in Science Advances today.

This is the last year for Operation IceBridge, NASA’s most comprehensive airborne survey of ice change. Since the launch of its first Arctic campaign in spring 2009, IceBridge has enabled discoveries ranging from water aquifers hidden within snow in southeast Greenland, to the first map indicating where the base of the massive Greenland Ice Sheet is thawed, to detailed depictions of the evolving Arctic sea ice cover and the thickness of the overlying snow.

In Alaska, 5 percent of the land is covered by glaciers that are losing a lot of ice and contributing to sea level rise. To monitor these changes, a small team of NASA-funded researchers has been flying scientific instruments on a bright red, single-engine plane since spring 2009.

A NASA glaciologist has discovered a possible second impact crater buried under more than a mile of ice in northwest Greenland. This follows the finding, announced in November 2018, of a 19-mile-wide crater beneath Hiawatha Glacier – the first meteorite impact crater ever discovered under Earth’s ice sheets. Though the newly found impact sites in northwest Greenland are only 114 miles apart, at present they do not appear to have formed at the same time.

A gigantic cavity — two-thirds the area of Manhattan and almost 1,000 feet (300 meters) tall — growing at the bottom of Thwaites Glacier in West Antarctica is one of several disturbing discoveries reported in a new NASA-led study of the disintegrating glacier. The findings highlight the need for detailed observations of Antarctic glaciers' undersides in calculating how fast global sea levels will rise in response to climate change.

An international team of researchers, including a NASA glaciologist, has discovered a large meteorite impact crater hiding beneath more than a half-mile of ice in northwest Greenland. The crater — the first of any size found under the Greenland ice sheet — is one of the 25 largest impact craters on Earth, measuring roughly 1,000 feet deep and more than 19 miles in diameter, an area slightly larger than that inside Washington’s Capital Beltway.

PLAN OF THE DAY FOR WEDNESDAY, Nov 14: FLIGHT DAY

0600 Breakfast Opens
0800 Power On
0900 Flight brief
0930 Doors close
1000 Take off

NASA’s Operation IceBridge flew over an iceberg that is three times the size of Manhattan – the first time anyone has laid eyes on the giant iceberg, dubbed B-46 by the U.S. National Ice Center, that broke off from Pine Island Glacier in late October.