1. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Townhall Meeting 13 March 2016 15:00 – 17:00 Multidisciplinary drifting Observatory for the Study of Arctic Climate

2. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Markus Rex K. Dethloff, M. Shupe, M. Rex, U. Nixdorf, M. Nicolaus & the international MOSAiC consortium Introduction

3. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Introduction (Markus Rex, 10min) Science / Implementation (Matthew Shupe, 15min) Logistics (Uwe Nixdorf, 10min) Practical Issues (Marcel Nicolaus, 10min) Modelling (Klaus Dethloff, 10min) Next Steps (Markus Rex, Matthew Shupe, 5min) Agenda for Meeting at ASSW 2016

4. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Overarching goal: To improve the understanding of coupled atmosphere-ice-ocean-ecosystem processes in the Central Arctic to support improved sea ice forecasting, regional weather forecasting, and climate predictions. Multidisciplinary drifting Observatory for the Study of Arctic Climate

5. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks http://data.giss.nasa.gov/gistemp/time_series.html Near surface temperature changes derived from observations 90 60 30 Arctic Equator Antarctic 0 -30 -60 -90 196019701980199020002010 The Arctic is a key area for gloabal climate change

6. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Stroeve et al., 2007, updated Arctic climate change is not well represented in state-of-the-art Earth System Models 10 8 6 4 2 0 19001950200020502100 Minimum sea ice extent (10 6 km 3 ) Models versus observations Understanding of key climate processes in the Arctic is limited by lack of observations! Many processes in the Arctic climate system only roughly represented in Climate Models

7. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Year round observations in the Central Arctic Central Station: RV Polarstern Distributed network of satellite stations Supply by rendevous with icebreakers from MOSAiC partners Additional science on supply cruises 2019-2020

8. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Main scientific focus areas Aerosols Ozone Layer Dynamical coupling Boundary layer Clouds Sea ice Ecosystem Energy & momentum fluxes Radiation Formation Drift Deformation Melting Vertical fluxes through boundaries between ocean, sea ice and atmosphere Meridional fluxes in atmosphere and ocean Thermal structure Small scale processes Chemistry in ocean, sea ice & atmosphere Interaction with aerosols and clouds Vertical and meridional dynamical coupling in the Arctic climate system Radiative properties of clouds & aerosols Microphysical interactions between clouds & aerosols Interactions with boundary layer Precipitation Biogeochemical fluxes Chemistry Full seasonal cycle: Ecosystem dynamics Populations in ocean and sea ice

9. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Year round observations in the Central Arctic Services for stakeholders and the society Development and improvement of process models for relevant Arctic sub-systems Development and improvement of subgridscale parametrizations for Earth System Models General Research Approach

10. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks SEA ICE BIO-GEO- CHEM. OCEAN ECO- SYSTEM ATMO- SPHERE Working Groups

11. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks Organisational Implementation Administration and Infrastructure K. Wurr, C. Ruholl, J. Eilers, C. Ungermann, U. Nixdorf International Advisory Board M. Shupe, H. Yang, V. Sokolov, S. Gerland Project Coordinator M. Rex Supported by Project Manager Executive Committee K. Lochte, M. Rex, K. Wurr, U. Nixdorf AWI Research Sections International Partner Institutions Project Board Representatives of the 5 Topics SEA-ICE OCEAN BIO-GEOCHEM. ECOSYSTEM ATMOSPHERE

12. MOSAiC Meeting, ASSW, 13 March 2016, Fairbanks