All photos: Robin Davies
After about three weeks and 400 miles—many of which were wind-blown and snowy on the soft, roadless route toward Summit—the Greenland Inland Traverse team (GrIT) rolled into the international deep drilling camp NEEM last Thursday, 12 May.
The Polar Husky superstars of GoNorth! arrived on the 12th as well, in time for project members with teaching and other commitments to meet the flight scheduled for the 13th. Of course that flight was delayed a day due to weather on the ice cap, but eventually the plane came, and personnel were appropriately shuffled.
Exit Jim Lever, Enter Zoe Courville
The GrIT team welcomed Zoe Courville of CRREL on Saturday. We hear the mood was festive at NEEM camp that evening, as many camp personnel were newly arrived on the day’s ANG flight, as well. The NEEM blog site notes that “Everybody had a fine evening, and a lot of people joined in the mid-night dance, featuring the Danish group “Sweet hearts.”
Back to work on Sunday: The GrIT team conducted maintenance on traverse vehicles, delivered 1500 gallons of fuel to NEEM, and reconfigured the loads, shifting another1500 gallons of fuel to the Tucker’s fuel bladder. Net load reduction for the Case: 21,600 pounds. “The Durabase (a semi-flexible plastic bed) is now on High-Molecular-Weight sleds to see if the sleds reduce the drag,” project manager Allen Cornelison noted.
The team headed out for Summit on Sunday, another ~430 miles ahead. On Monday “the Case was able to grab 7th gear,” a first, wrote Cornelison. Still, “it was unable to go any faster probably because it was making 14-inch ruts.” Despite soft snow conditions, the team advanced 45 miles.
More Sled Mobility Tests
The qualities of Greenland’s snow surface and sled mobility are clear foci of the GrIT’s experimental component. Before departing on the traverse, CRREL personnel at Thule fitted the Durabase sled with sensors that collected data at the snow/sled interface; when he returns to CRREL, Lever will analyze these data in hopes they shed light on how to make the interface more slippery.
Back at Thule earlier this spring, Jim Lever prepared the HMV sleds for mobility experiments. Here, the sled is outfitted with heaters. The sensors to collect data on temperature and mobility can be seen along the edges. A second sled was tested using enhanced passive (solar) warming methods.
In addition, after departing the GrIT, Lever flew to Summit Station, where he is conducting mobility tests on a raft purchased specifically for traverse development. Jim’s findings may be applied to improving bipolar mobility—for GrIT and its southern cousin, “SPoT” (the South Pole Traverse).
The Greenland Inland Traverse is funded by the National Science Foundation (NSF). CH2M HILL Polar Services and Cold Regions Research and Engineering Laboratories are working together with the NSF to develop the traverse infrastructure and route. The 2010 spring traverse has several foci: find a safe overland route to Summit Station to help reduce logistical costs and environmental impacts of conducting research there; provide a research platform for scientists conducting field work in Greenland; optimize mobility by focusing on the sled/snow interface. For more field notes coverage of GrIT, click here.
Allen Cornelison, Polar Field Services, CH2M HILL Polar Services
GrIT project manager