1. AWI activities in spring/summer 2015 Polarstern and Polar 5 campaigns Thomas Krumpen, Christian Katlein, Marcel Nicolaus, Gerit Birnbaum, Sascha Willmes, and many others

2. AWI activities 2015 9293.193.294 May Jun Jul Aug Sep Oct Polarstern Polar 5 MELTEX

3. PS92 vs. N-ICE vs. MELTEX N-ICE MELTEX PS92

4. Duration 19 May – 28 June 2015 From/to Bremerhaven – Longyearbyen Organization Arctic in Rapid Transition Initiative Campaign leader Ilka Peeken Ilka.Peeken@awi.de TRANSSIZ Transitions in the Arctic Seasonal Sea Ice Zone Polarstern Cruise PS92 Ice stations during PS92

5. Mass/Energy Balance Remote Sensing/Model Snow Properties Sea Ice Thickness Airborne EM Ground EM Snow Depth Ice optics ROV Surface characteristic surveys Aerial photography Objectives: Sea Ice Physics

6. Airborne Sea Ice Thickness 29.05. 2013 AWI - Sea Ice Observations Direct method based on contrast of el. conductivity between ice & water Airborne EM EM Bird measurements

7. 2015 / June EM Bird measurements May/June

8. Documentation Sascha Willmes

9. ROV Cabin Reference sensor Generators Under ice measurements (ROV)

10. Magna Probe: Snow Thickness GEM: Ice Thickness Snow and ice thickness

11. Development of parameterizations Ice/snow thickness vs. transmittance

12. Duration: 30 June – 06 August 2015 Flights hours: 85 h Levels: 200 ft, 2000 ft Campaign leader: Gerit Birnbaum Gerit.Birnbaum@awi.de Station Nord MELTEX aircraft campaign

13. Ice thickness and topography Melt pond characteristics Surface and pond albedo Validation of satellite data (sea ice motion, deformation, feature classification, etc.) Goals

14. Instrumentation

16. Buoy deployments CALIB by MetOcean Deployment of 8 buoys on 03 July 2015 Study deformation in Fram Strait Validate summer sea ice drift data Relocate area of interest

17. Thickness comparison

18. SAR support

19. …thanks