depth in the Southern Ocean. In Proceedings of Ocean Optics XXI, Glasgow, United Kingdom, Oct 2012. Taylor B. B. , Taylor M. H., Dinter T., Bracher A. (2012) Intercomparison of ocean color products identifying [...] Oziel L., Karakus O., Sidorenko D., Völker C., Ye Y., Zeising M., Hauck J. (2023) Ocean biogeochemistry in the coupled ocean-sea ice-biogeochemistry model FESOM2.1-REcoM3. Geoscientific Model Development: [...] monitoring of surface phytoplankton functional types in the Atlantic Ocean. Report: 7th edition of the Copernicus Marine Service Ocean State Report (OSR 7). State of the Planet Discussions 1, preprint,

Martin Losch, Helge Goessling Assimilation system § Model: AWI-CM (FESOM1.4-ECHAM6), ~25 km in the Arctic § Method: LESTKF (Nerger, 2012), a variant EnKF coded in PDAF § State vector: SIC, SIT, SIU, SIV [...] SAF data CTRL Analysis OSI SAF Only nominal data are assimilated and plotted. AO -AO + Analysis- Ocean Comparison to EN4 Theta Salinity SalinityTheta Analysis Analysis- Atmosphere Differences to ERA-Interim [...] SIC and SIT increments at each analysis step. Increment- Sea ice Sea ice drift increment Increment- Ocean Theta Implications from other experiments August mean Antarctic SIT averaged over 2007-2012 (No sea

al., 2017 Global FESOM2 setup with 4.5 km Arctic Ocean Sea ice dynamics 𝐷(𝑚𝒖) 𝐷𝑡 = −𝑚𝑓*𝒌 ×𝒖 + 𝝉𝒂 + 𝝉𝒘 −𝑚𝑔∆𝐻 + 𝛻 6 𝝈 Coriolis force a/s and ocean drag Sea Surface tilt Ice interaction Ice [...] not scale well FESOM2 throughput depending on NEVP (4.5km Arctic Ocean setup, 1728 cores) At about 650 NEVP the sea ice code cost as much as ocean code. Scalability of different model computational cores [...] From this To this Same computational cost Ice thickness, 4.5 km resolution Arctic setup Finite Element (volumE) Sea Ice Ocean Model FESOM Solves: • hydrostatic primitive equations • sea ice equations Domain:

Error bars: One standard deviation of the mean difference Where & when? NSIDC regions „Arctic Ocean“ and „Canadian Arctic Archipelago“ for 2003-2011 PMW differences to MODIS SIC & ISF as f(melt-pond fraction) [...] Products Pan-hemispheric inter-comparisons Evaluation at 100% sea-ice concentration Evaluation during Arctic summer melt * Kern, S., et al., ICDC, CEN, University of Hamburg 9th Int. Workshop on sea ice modelling [...] Products Pan-hemispheric inter-comparisons Evaluation at 100% sea-ice concentration Evaluation during Arctic summer melt * Kern, S., et al., ICDC, CEN, University of Hamburg 9th Int. Workshop on sea ice modelling

Antarctic ice-bed-ocean interfaces , Nature Communications, 9, doi: 10.1038/s41467-018-04583-0 . Stärz, M. , Jokat, W., Knorr, G. and Lohmann, G. (2017): Threshold in North Atlantic-Arctic Ocean circulation [...] doi: 10.1038/ncomms15867 . Stein, R., Fahl, K., Gierz, P. , Niessen, F. and Lohmann, G. (2017): Arctic Ocean sea ice cover during the penultimate glacial and the last interglacial , Nature Communications [...] , Jokat, W. and Lohmann, G. (2016), Evidence for ice-free summers in the late Miocene central Arctic Ocean , Nature Communications, 7, pp. 1-13, doi: 10.1038/ncomms11148 . Abelmann, A., Gersonde, R. ,

A. (2013): FRAM - FRontiers in Arctic marine Monitoring: Permanent Observations in a Gateway to the Arctic Ocean , OCEANS - Bergen, 2013 MTS/IEEE . doi: 10.1109/OCEANS-Bergen.2013.6608008 49. Soltwedel [...] Biological experiments at a long-term station in the deep Arctic Ocean using the Remotely Operated Vehicle VICTOR 6000 (Poster) , Arctic Ocean Conference, Stockholm, Schweden.-07.11.2001 . 291. Soltwedel [...] variation due to warming of the Arctic ocean , ASLO Conference, Granada, Spain, 22 February 2015 - 27 February 2015 . 6. Soltwedel, T. (2015): FRAM - FRontiers in Arctic marine Monitoring: Permanent Ob

Saccharina latissima. Picture by Emil Bremnes. CONSUMERS Eat food that also restores the ocean 6 Discover new food from the ocean 8 Inspiring new recipes 10 Cooking event in Brest: tasting the low trophic world [...] long-lasting international cooperation and research advances have contributed to the All-Atlantic Ocean Community and its ability to unlock sustainable food production now and into the future. The links [...] resources 40 Having fun with low trophic aquaculture 41 CONSUMERS Eat food that also restores the ocean By 2050, it is estimated that the Earth will be home to 10 billion people. Feeding the world is already

O: Comparison of the zooplankton diversity under different ice conditions in the central deep Arctic Ocean in 1990-s and 2000-s K. Kosobokova , Elizaveta Ershova 14:00-14:15 WP5- IORAS: Results of the [...] 13:30-13:50 WP1-AARI: Observed atmospheric and sea-ice changes and feedbacks: Svalbard area and Euarasian Arctic - in situ observations and ice charting. B. Ivanov, V. Smolyanitsky, T. Alekseeva 13:50-14:10 Discussion [...] 16:10-16:25 WP3- AWI-AC: The role of synoptic-planetary wave interactions for the linkage between Arctic climate change and mid-latitude atmospheric circulation changes D. Handorf 16:25-16:40 WP3- IAPRAS:

Woodhouse, M. T.: Influence of oceanic dimethyl sulfide emissions on cloud condensation nuclei concentra- tions and seasonality over the remote Southern Hemisphere oceans: A global model study, J. Geophys [...] free Antarctic continent represents an outstanding case: sur- rounded and isolated by the Southern Ocean from other con- tinents, NPF should be inherently linked with the advection of marine air masses. [...] mechanisms of NPF and the influence on CCN concentra- tions in the remote atmosphere of the Southern Ocean. The work of Korhonen et al. (2008) revealed a weaker impact of DMS-derived secondary aerosol on marine

O pen A ccess Hydrology and Earth System Sciences O pen A ccess Discussions Ocean Science O pen A ccess O pen A ccess Ocean Science Discussions Solid Earth O pen A ccess O pen A ccess Solid Earth Discussions [...] on snow may have substantially contributed to the rapid warming entailed by sea ice loss in the Arctic (Hansen et al., 2005). Concerning the global distribution of carbonaceous aerosols, there is a major [...] ments indicate a geographical gradient of atmospheric BC concentrations from South Pole to Southern Ocean with min- imum BC concentrations at South Pole (around 0.65 ng m−3, Bodhaine, 1995), slightly increasing