1. A new look at the new Arctic sea ice cover
Multidisciplinary drifting Observatory for the Study of Arctic Climate
Snow and Sea Ice
A new look at the new Arctic sea ice cover

2. Winter, spring, summer, and fall in the new Arctic Ocean
A year long time series
Winter, spring, summer, and fall in the new Arctic Ocean

3. Of every available ice type
First year ice
Multiyear ice
Ridges
Winter leads
Summer leads
Melt ponds
Examine spatial variability as well as temporal evolution

4. Snow and Sea Ice: Connections
Modelling
Physical properties
Atmosphere
Mass balance
Ice dynamics and mechanics
Thickness
Remote Sensing
Ocean
Optics
Ponds and leads
Bio- Geochemistry
Ecosystem
Sea ice is a great integrator in the middle of everything

5. Snow and Sea Ice Sub-Topics
Physical Properties of Sea Ice
Temperature, Salinity, Density, Texture, O18 Ice cores, Salt and oxygen harps
Porosity Multi-frequency EM
Archive samples Coring
Properties of Snow Pack
Grain size, specific surface area Snow pits
Stratigraphy and micro-structure Snow pits, Computer Tomography
Density, hardness, snow-water equivalent Penetrometer, snow pits, snow fork
Temperature Thermistor chains, manual profiles, IR surface temperature
Black carbon and chemical properties Sun Photometer

6. Snow and Sea Ice Sub-Topics
Mass Balance of Sea Ice and Snow
Sea ice thickness, snow depth, freeboard EM transects, Magna Probe, snow radar, stakes, hot wires
Ice growth, surface, bottom ,lateral melt Stakes, ROV multi-beam
Surface topography LIDAR, particle counters
Floe size distribution Photo cameras, ship radar
Ice Dynamics and Mechanics
Deformation and Shear Ship radar
Position High resolution position (GNSS)
Stress and Strain Strain gauge, sensors on Polarstern
3D ridges Structure by motion, ROV multibeam, UAV with LIDAR,
surface laser scanning

7. Snow and Sea Ice Sub-Topics
Ice and Snow Optics
Spectral albedo Radiation stations, transects, airborne hyper-spectral camera
Spectral transmission and PAR Radiation stations, transects, ROV
In ice spectral irradiance profiles Radiation stations, light harp
Absorption in ice algae and upper ocean Sampling, stations, ROV, and profiling

8. Snow and Sea Ice Sub-Topics
Melt Ponds
Depth, geometry and coverage Surveys, stereo cameras, cameras, hyperspectral cameras
Surface roughness and false bottoms LIDAR, ROV mutli-beam and video
Surface temperature IR temperature (KT19)
Salinity and water properties Sampling
Leads
Ice growth in winter Thickness gauges, autonomous stations
Thermohaline structure Sampling
Heat content Horizontal and vertical profiles of T,S
Lateral melt Surface measurements, aerial photographs

9. Intensive Observation Periods (IOPs)
Freeze-up &
Ice Growth
Sea ice dynamics
Snow properties
Sea ice optics &
Melt processes
Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep
MOSAIC End
MOSAIC Start
Intensive study of particular properties and processes

10. Distributed Observations
Buoys
Drift and deformation array All buoys with GPS
Stress
Stress gauges
Wave interaction
Wave buoys, tiltmeters
Sea ice thickness IMB (CRREL and thermistor)
Snow depth Snow Buoys, IMB (CRREL and thermistor)
Temperature (snow/ice, air, surface) Snow Buoys, IMB, SVP, Weather Station
Surface conditions Camera Buoys, IMB thermistor, ITP
Radiation Radiation stations, weather stations
Other: Atmosphere, Ocean, Eco, BGC Other teams
Possible setup example
Extending the Central Observatory

11. Berth concept and activity planning
Snow and Sea Ice Team: total 8 berths
Sample schedule for spring
Ambitious plan with a team approach

12. Snow and Sea Ice Modelling
Numerical Modelling
Contribute to Sea Ice Outlook (seasonal timescale)
Use MOSAiC observations to improve data assimilation
Develop a complex 1-D thermodynamic snow/sea ice/upper ocean model, possibly to include bio-geo-chemistry
Apply a 3-D snowpack model to sea ice
Parameterize sea ice/snow/mixed layer processes for a 3-D model
Improve albedo treatment in Community Earth System Model
Implement improved components into coupled climate model
Models informing observations to improve parameterizations

13. MOSAiC: Snow and sea ice
Thanks to many people for many contributions

15. Questions to be answered
Instruments used and responsible lead
Measured parameters: spatial and temporal over 4
Parameters used for model applications
Time schedule for measurements (weekly, monthly, seasonal)
Coordinated measurements for crosscutting events (fronts, blooms, etc.)

16. XX Other things I thought of
List some key partners with names here and there
Have some rough statement that we are extremely tight with the berth. I will still try to argue that for the ROV and the Helicopter, we get another berth or can give these people into a common pool
Need to acknowledge all the great contributions from the community already
Writing proposals
Participating in meetings
Promoting MOSAiC
etc
Show some more links to other teams (there is only the one slide in the beginning)
Also highlight our central role in organizing the different “infrasturctures”:
Central observatory
Helicopters
Ground tuthing of RS
ROV
Need to add more modelling from the model table
May be add a statement on the amount of funded work