Posts Tagged ‘Extreme Ice Survey’

Tuesday, June 30, 2009

Monday, July 6th, 2009

The four new German Greenpeace / Extreme Ice Survey (EIS) time lapse cameras are installed.

The first was installed 25 June at a 4.6 km wide glacier called Rink Isbrae (71 deg 42.348 min, 51 deg 38.055 min). Rink produces 15 cubic km of is, ranking it number 2 among the most active glaciers in west Greenland. One EIS camera has already been working at Rink, *continuously* since June 2007. Now with two cameras at rink, 3D measurements can be made using “stereo photogrammetry” techniques. Image recording interval at both Rink cameras is 1 h. The Rink Glacier cameras should be revisited ~10 August with an Air Greenland charter if not sooner with the Greenpeace helicopter.

The other three German Greenpeace / Extreme Ice Survey (EIS) cameras were installed 28 June overlooking from 1000 m cliffs on both sides of the 16 km wide Petermann Gletscher (81.5 N latitude). Presently, these cameras are shooting at 1 minute intervals. We plan to re-visit these sites today, weather permitting. Currently we have fog.

Two of the three Petermann Gletscher installations are temporary and will be relocated to one or two candidate glaciers accessible as part of the Extreme Ice Survey (EIS) maintenance tour out of Upernavik or Uummannaq.

*candidate glaciers near Uummannaq:
Kangerdluarssup Sermia (71°14’45.76″N, 51°27’41.36″W)

Kangerdlugssup Sermerssua (71°27’29.79″N, 51°21’32.25″W)

* candidate glaciers near Upernavik (Near Kullorsuaq settlement: Devils thumb):
Alison Glacier (74°37’21.31”N, 56°13’4.99”W)

Jason E. Box
Byrd Polar Research Center
guest scientist on Greenpeace ship Arctic Sunrise

‘Arctic Sunrise’ Northernmost Excursion

Monday, June 29th, 2009

The Greenpeace ship Arctic Sunrise is at 82.5 N with its nose up against an ice arch that has formed 450 km north of it’s normal position. This is the farthest north a Greenpeace ship has been. Our northward progress to the top of Nares St. could not have been easier with the waters almost completely ice free and winds calm.

I took thousands of aerial photos yesterday of Petermann glacier from a helicopter as part of an install of 4 Extreme Ice Survey (EIS) time lapse cameras. The distance across Petermann fjord is not too great for the two pairs of EIS cameras to “see” the goings on below thanks to 1000+ meter cliffs on either side of the glacier. The surface of Petermann has a surprising number of melt ponds and streams, some more aptly put as lakes and rivers. Numerous cracks across Petermann make the prediction of a large (100 sq. km) area seem imminent. A 5th, on-ice, camera site is equipped with an “iceberg tracker” that sends its position twice daily via Iridium satellite. At the moment the “ice camera” remains stable. Eventually, its whole world should start to move, once the ice island detaches.

Jason E. Box @ 0808 UTC aka GMT