1. 100 m Tartu Flag Flag Tents Toilet TV + mess tent Met. mast Balloon winch Camera view TARA Radiation station POP Seismometer Ice mass balance Tiltmeter Spectral radiation II Spectral radiation I Under ice radiation Validation line – to Helsinki -- 9 Snow stakes Validation line -- to Paris -- Map of ice-camp facilities and scientific sites To the airstrip approx. 500m 22 to 29 April 2007 Position: 88,19°N 124,10°E (on 29 April at 06:30 CET) Sea ice coring Snow pits CTD Organic waste Ice core Single measurements Monitoring program Flags and red tents Facilities and white tents Major pressure ridge Major pressure ridge Ice core Spectral radiation 0 2 Thermistors Snow pits Snow pit Black carbon II Black carbon I N 200 sites: snow depth, ice thickness and freeboard Contribution from the snow and ice group

2. Camera Thermistors Radiation station Snow stakes Aerial photograph (from approx. 200 m height) Major pressure ridge Major pressure ridge

3. Snow pits POPS Radiation station 2 Thermistor strings Sea-ice coring Photograph from the camera on board Tara (karhukamera) 9 Snow stakes

4. Snow and ice thickness validation line Met. mast Radiation station Ice coring and snow pits Thermistors Airstrip Snow stakes Aerial photograph from 29 April 2007 (during Twin Otter takeoff)