1. Multidisciplinary drifting Observatory for the Study of Arctic Climate
Central Observatory
Workshop 1 and 2 Nov
Based on experiences: N-ICE, SHEBA, PS106
Involvement of all teams
Documentation of the process
Now: first draft
Then refining based on this workshop and continuous process
Needs: critical view, contributions, suggestions
Needs not: safety discussions

2. Selecting the Floe Decisions at home Drift path criteria
Now: Plans with 84-85°N / °E
In 2019: Refining based on actual ice conditions
Drift path criteria
Survival for 1 year
Lowest risk to Greenland and Beaufort Gyre
Lowest risk into Russian EEZ
Best position for supply and airborne campaign
At the starting position
Origin and history of the floe: one year old from Laptev Sea
Distance to open water
Surrounding ice conditions (Distributed Network)
Ice thickness distribution (re-supply)
Floe size
Figure: T. Krumpen

3. The Initial Phase Arriving at the floe Set-up priorities
Polarstern goes along side of the floe
Set-up support on the Central Observatory from 2nd vessel
2nd vessel to support Set-up of distributed network
Possible exchange of personnel and equipment
General plan: ice station on starboard side
Set-up only after intensive floe inspection and on-board coordination
Set-up choice and spare installations <= break ups
Set-up priorities
Define a time window for set-up work
Teams need to define their priorities
Will define a start date for “regular” measurements and operations

4. Main Installations 1/2 Met City Ocean City ECO Sites BGC Sites
Met towers: 15 or 20m high, 10m high, mobile
Radiation
Tethered Balloon
SODAR
Aerosols, blowing snow
Ocean City
Weather haven (e.g. CTD, MSS, ECO profiling)
Small tents (e.g. ADCP)
ECO Sites
Various holes (Primary productivity, Sediment traps, incubations, AZFP)
Coring areas (200x200m)
BGC Sites
Coring areas (100x100m)
Snow samplings (100x100m)
Water pumping

5. Main Installations 2/2 ICE Sites Close to Polarstern Others
2 ROV sites (hut and tent)
Airborne and remote sensing no-go with transects around (2x1km)
2 main buoy sites (100x100m)
Small masts (e.g. to lead)
Ablation stake field (4x 50x50m)
Remote sensing antennas (100x100m)
Optic stations and transect
Close to Polarstern
Hovercraft and helicopter landing
Shelter for Pistenbulli / Skidoos
AUV launch
Contamination site (50x50m)
Others
Distributed shelters and safety equipment
Runway
Unmanned Aerial Vehicle Site
Distributed installations (e.g. thermistor strings, chambers, cameras, LIDAR)

6. The Set-Up Dependencies of measurements and installations
Distances to other sites
Contamination (distance and direction to Polarstern)
Ropes
No or limited access areas
Power supply
Distance to power line
Impacts and dependencies
Holes in summer
Electronic / electromagnetic / acoustic interference
Light pollution
Across teams and methods (holes, interference, contamination, …)
Impacts of Polarstern and supply vessels
Traffic on the floe / pathways
Maintaining the surface (snow accumulation)
Snow and ice conditions
Surface conditions, being representative
New ice formation and riding
Break up scenarios

7. The Floe Map

8. Beyond the Central Observatory
The 2-km site
Observations and sampling with least impact of Polarstern and the Central Observatory
Routine visits (need coordination with other remote work: Helicopter, Hovercraft)
Could have flagged track to Polarstern
The 10-km site
Access by Hovercraft and Helicopter
Close nodes of the distributed network
5-km nodes
Super sites at 15 km

9. Beyond the Central Observatory

10. Additional aspects Floe coordinate and meta-data system
Measurements must have x/y coordinates
Need to maintain local coordinate system of ALL sites, measurements, etc.
Ice Station Log book
AIM: The MOSAiC story book, a quick summary of each day
Daily log of all team leaders and coordinators on board
Needs to be designed
Ice conditions, weather, ocean
Measurements
Coordinated external observations
Action item list
Solve the WHO aspects
Next status meeting: July 2019

11. Coordination on Board Mission Board for regular briefings Weekly plans
Cruise leader with 5 team leaders (incl. co-cruise leader)
Organizing the 24h routines
Cross-team and method dependencies (interference, contamination, …)
Weekly plans
Synchronizing activities on the floe and on Polarstern
Considering weather conditions and safety aspects
Distributing limited supplies (scooters, weapons, …)
Binding regulations for all participants
Development over next year at AWI
Including international expertise
The big WHO
General duties, services and maintenance
Installations, huts, shelters on the ice
Powerline
Pistenbulli and scooters