Operation IceBridge completes 2016 Arctic spring campaign

Operation IceBridge completes 2016 Arctic spring campaign
Glacier de France emptying into the Denmark Strait, Greenland. An ice melange, or a mix of broken icebergs and sea ice, is visible at front of the glacier. Photo taken during NASA's Operation IceBridge Helheim-Kangerdlugssuap Gap B mission on May 17, 2016. Credit: NASA/Maria-José Viñas

Operation IceBridge, NASA's airborne survey of polar ice, ended its eighth spring Arctic campaign on May 21. During their five weeks of operations, mission scientists carried out six research flights over sea ice and ten over land ice.

"We collected data over key portions of the Greenland Ice Sheet, like the fast-changing Zachariae Isstrom Glacier, and we got the broad geographic coverage of Arctic we needed," said Nathan Kurtz, IceBridge's project scientist and a sea ice researcher at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "This is an important continuation of the time series for Arctic ice, particularly with the very warm Arctic winter noticeably impacting sea ice retreat and melt onset this year."

The 2016 Arctic campaign's inaugural research flight took place April 19 aboard one of the National Oceanic and Atmospheric Administration's Hurricane Hunter planes, a P-3 Orion. This year's deployment was shorter than normal due to aircraft maintenance issues and persistent bad weather in the north of Greenland. The first part of the campaign —based out of Thule Air Base in northwest Greenland and also out of Fairbanks, Alaska— focused on sea ice.

"The good news is that we covered the entire western Arctic basin," said Jackie Richter-Menge, IceBridge science team co-lead and sea ice researcher with the U.S. Army Corps of Engineers Cold Regions Research and Engineering Laboratory in Hanover, New Hampshire.

In the coming weeks, IceBridge scientists will be releasing a dataset of sea ice measurements that were collected during this deployment. Modelers will use the data —together with other measurements, such as those of the European Space Agency's (ESA) CryoSat-2 satellite— to try to forecast how the upcoming will evolve.

NASA’s Operation IceBridge has returned from its spring campaign measuring changes in the Greenland ice sheet and in sea ice in the Arctic Ocean. Flying for the first time on board a borrowed NOAA P-3 aircraft, the airborne mission accomplished many of its key goals for the season, including getting measurements over some of the fastest-changing glaciers in Greenland.

"This year we're looking at the potential of an extremely low , so IceBridge's measurements of sea ice will be particularly relevant," Richter-Menge said.

During this campaign the IceBridge aircraft flew under the path of Sentinel-3A, a recently launched ESA satellite that carries a radar altimeter that gauges . Scientists will compare the Sentinel-3A measurements to the data IceBridge collected over the same spots with its radar and laser altimeters. This comparison will help validate and refine Sentinel-3A's data gathering.

The last leg of this year's springtime Arctic deployment was based out of Kangerlussuaq, Greenland, and focused on measuring changes in the elevation of the ice sheet.

"Unlike with the sea ice portion of the campaign, we had a streak of good weather in Kangerlussuaq and the science flights picked up—we flew 10 out of 11 possible flight days," said John Sonntag, IceBridge mission scientist. "It was a very positive way to end our deployment."

This summer, IceBridge will conduct two additional campaigns to measure the impact of the melt season on Arctic sea and land ice. The first one will take place in late July and will be based out of Barrow, Alaska, focusing on the sea ice cover in the Beaufort Sea. The second one, planned for late August to early September, will be based in Kangerlussuaq, Greenland, and repeat land ice missions that IceBridge completed in May, to measure how fast ice thins during the upcoming melt season. The Barrow campaign will last about two weeks, while the Kangerlussuaq deployment will go on for three weeks.

Operation IceBridge completes 2016 Arctic spring campaign
This image was taken by one of Operation IceBridge's infrared camera, which measures the temperature of the surface IceBridge is flying over. This image, taken in the middle of the Arctic Ocean, shows cold, ridged, snow-covered sea ice, flanking a lead, or crack in the sea ice. As floating sea ice insulates the water beneath it, the recently opened lead in the ice is warmer than the recently-formed thin ice immediately bordering it, and much warmer than the snow-covered sea ice in the rest of the image. Credit: NASA/Operation IceBridge

While in Kangerlussuaq, Operation IceBridge hosted several visitors: a TV crew from Spain working on a documentary about climate change in the Arctic; a freelance photographer; four IceBridge-affiliated scientists; and Kelly McCarthy, a science and math teacher from Coal Township, Pennsylvania, who visited IceBridge through the National Science Foundation's PolarTREC educational program.

Also new to the flights was Joe MacGregor, the recently-appointed IceBridge deputy project scientist and a land ice researcher with Goddard.

"It was a fantastic experience," MacGregor said. "It was nice to experience the raw challenges of collecting data and the decision-making process involved in moving forward with the campaign."

The mission of Operation IceBridge is to collect data on changing polar land and sea ice and maintain continuity of measurements between ICESat missions. The original ICESat mission ended in 2009, and its successor, ICESat-2, is scheduled for launch in 2018. Operation IceBridge is currently funded until 2019. The planned overlap with ICESat-2 will help scientists validate the satellite's measurements.

During its eight years of operations in the Arctic, IceBridge has gathered large volumes of data on changes in the elevation of the ice sheet and its internal structure. Measurements from IceBridge have revealed a 460-mile-long (740 kilometers) canyon hiding under a mile of ice and mapped the extent of a vast liquid water aquifer beneath the snow in southern Greenland. IceBridge's readings of the thickness of sea ice and its snow cover have helped scientists improve forecasts for the summer melt season and have enhanced the understanding of variations in ice thickness distribution from year to year.

Citation: Operation IceBridge completes 2016 Arctic spring campaign (2016, June 6) retrieved 22 September 2023 from https://phys.org/news/2016-06-icebridge-arctic-campaign.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

NASA to fly parallel science campaigns at both poles


Feedback to editors