1. A coupled model system for shelf seas and marginal seas Hans Burchard (IOW) and many others

2. Motivation Climate changeEutrophication Constructions Fishery IPCC BACC Baltic Assessment for Climate Change

3. The Baltic Sea estuarine circulation Reissmann et al., 2009 Exchange flow Inflows Boundary and internal mixing Air-sea interaction

4. Hydrography of upper mixed layer in Central Baltic Sea

6. Data: Volker Fiekas (FWG) Micro- structure- profiles

7. Burchard et al. (2006) Biogeochemistry in the upper Central Baltic Sea

8. Zooplankton migration in Central Baltic Sea

9. Coupling waves and currents GETM Current velocities at coastal station (Duck‘94) Cross-shore Along-shore Moghimi et al. (2013)

10. Implementation of Marine Strategy Framework Directive Questions about complex interactions in a variable coastal environment require an integrative model concept. Modular System for Shelves and Coasts (MoSSCo)

11. atmospheric chemistry atmospheric physics benthic geoecology benthic biogeochemistry cohesive sediments adaptive ecosystem & element cycles waves river discharge ocean physics ocean BGC water physics Modular System for Shelves and Coasts (MoSSCo)

12. COAWST Modeling System C = Coupled MCT http://www-unix.mcs.anl.gov/mct/ O = OceanROMS http://www.myroms.org/ A = AtmosphereWRF http://www.wrf-model.org/ W = WaveSWAN http://vlm089.citg.tudelft.nl/swan ST = Sediment TransportCSTMS http://woodshole.er.usgs.gov/project- pages/sediment-transport/ Modeling System COAWST Coupled Ocean – Atmosphere – Wave – Sediment Transport Modeling System to investigate the impacts of storms on coastal environments. svn 455 v 2.6.0 v 3.4 v 40.91

13. Model setup OCEAN ATMOSPHERE WAVE u s, v s, , bath, Z 0 H wave, L mwave, L pwave, D wave, T psurf, T mbott, Q b, Diss bot, Diss surf, Diss wcap, U bot MCT Uwind, Vwind, Patm, RH, Tair, cloud, rain, evap, SWrad, Lwrad LH, HFX, Ustress, Vstress SST MCT U wind, V wind H wave, L pwave, T psurf, MCT WRF wind speed Longitude Latitude ROMS SSTSWAN Hsig SEDIMENT

14. SCRIP - grid interpolation Atmosphere model provides heat flux to cover entire ocean grid. SCRIP interpolations weights needed to remap data fields. Ocean model provides higher resolution and coupled response of SST to atmosphere. But the ocean grid is limited in spatial coverage so atmosphere model must combine data from different sources, which can create a discontinuity in the forcing. http://climate.lanl.gov/Software/SCRIP/ Flux conservative remapping scheme Ocean grid 5 km Atm Grid 6 km HFLX 1 0 GFS data SST

15. Nor’Ida Nov 2009 Bodie Island, NC Wallops Island, VA L L H 8 th Nov 9 th Nov 10 th Nov 11 th Nov 13 th Nov wind speed 23 m/s (50 mph) wind speed 23 m/s (50 mph) Before After http://coastal.er.usgs.g ov/hurricanes/norida/ Wave heights (m) wind speed 40 m/s (90 mph) wind speed 40 m/s (90 mph)

16. WRF WINDS WRF + ROMS + SWAN m/s WRF + ROMS S 0.85 0.78 0.89 DATA WRF WRF+ROMS WRF+ROMS+SWAN Reduced wind speed with waves coupling.

17. WAVES WRF WRF + SST +OOST WRF + SST DATA WRF WRF+ROMS WRF+ROMS+SWAN WRF + ROMS WRF S 0.80 0.74 0.88 m Reduced waves with waves coupling.