Arctic Ocean
The Arctic has a serious litter problem: in just ten years, the concentration of marine litter at a deep-sea station in the Arctic Ocean has risen 20-fold. This was recently reported in

for employees, politics and society. As a major research centre, the AWI maintains stations in the Arctic and Antarctic, research vessels and polar aircraft. This is associated with a comparatively high [...] societal options for action. With our research on changes in the atmosphere, the cryosphere, the ocean and the coast, corresponding feedback mechanisms as well as the consequences of climate change for [...] habitats and species and the overall significance of the UN goals for sustainable development for oceans and polar regions and to keeping these issues present in the public consciousness. A particular challenge

SAR mapping of young sea ice in the marginal ice zone from ocean gravity wave attenuation On the SAR mapping of young sea ice in the MIZ from ocean gravity wave attenuation Giacomo De Carolis1, Francesca [...] ons is still very large. The specific role of GPI in the energy exchanges between atmosphere and ocean has not yet fully understood, there is interest in improving observational capabilities to effectively [...] common form of ice in the freezing period in the MIZ. They are produced more often than before in the Arctic as a result of the sea ice cover decline, and are thought to be the primary source of sea ice fringing

differences between data products 7eolab.dk Coupled sea ice-ocean model Max-Planck Institute Ocean Model (MPIOM) global setup with focus over the Arctic Jungclaus et al., 2012 Niederdrenk et al., 2017 8eolab [...] Hendricksf, Michael Karcherb,f,Hajo Eickeng, and Ola Gråbakh aThe Inversion Lab, Hamburg, Germany bOcean Atmosphere Systems, Hamburg, Germany ceolab.dk, København, Denmark dLund University, Sweden eMax Planck [...] observational scenarios in terms of their constraints on target quantities of interest ● Based upon Arctic Mission Benefit Analysis (ArcMBA) system that was developed within an ESA-funded study This presentation:

ervice (Japan) O perational m onitoring and forecasting G lobal atm osphere, ocean and sea ice observations U se atm osphere and ocean system s for the reanalyses (JR A -55). P olar observations are used for [...] for the operational forecasting. The developm ent of im proved ocean-sea ice reanalysis. W ill use S IC , S IT, and velocity and lim ited ocean in-situ observations 5 days 10km B etter initializing sea ice [...] assessm ent of ten ocean reanalyses in the polar regions. C lim ate D ynam ics. D oi:10.1007/s00382-018-4242-z M eteorological S ervice (M étéo- France) Local, regional and global ocean and atm osphere inform

www.kepler-polar.eu EU Arctic Policy ● KEPLER represents the needs of users in all 3 pillars of the integrated EU policy for the Arctic ○ Climate Change and Safeguarding the Arctic Environment ■ Strongly [...] Maritime Monitoring GA: 821984 www.kepler-polar.eu Why KEPLER? ● Large changes in Arctic and Antarctic climate, on land, in the ocean and in the atmosphere ○ Contributing to an ‘opening up’ of the Polar Regions [...] Regions that has important socio-economic, environmental and security implications ■ Arctic Ocean will be increasingly accessible and more broadly used by those seeking the its abundant resources and trade

collect and analyse Arctic sea-ice drift forecasts at lead times from days to a year. Forecasts are made with various methods for drifting sea-ice buoys and, ultimately, the trans-Arctic MOSAiC drift campaign [...] Apr 1 Jul 1 Oct 1 Jan 2018 1 Apr 1 Jul 1 Oct 1 Jan 2019 uw001_IceOceanModel uo001_mpasCESM ukmo001_FOAM ukmo001_cplNWP ucl001_IceOceanModelTracer nrl001_flatearth24 metno001_RK2 esrl001_SeaIceVelocity [...] collect and analyse Arctic sea-ice drift forecasts at lead times from days to a year. Forecasts are made with various methods for drifting sea-ice buoys and, ultimately, the trans-Arctic MOSAiC drift campaign

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

Atmosphere, Sea Ice and Upper Ocean (w/ SST) EnVar: Atm, Ice, Ocean(SST, Mixed-layer) GEM NEMO+ CICE EnVar: Atm, Ice, Ocean(SST, Mixed-layer) GEM NEMO+ CICE EnVar: Atm, Ice, Ocean(SST, Mixed-layer) GEM NEMO+ [...] (no diurnal cycle) Page ‹#› – June 17, 2019 Strongly Coupled Atm-Ice-Ocean DA EnVar: Atm, Ice, Ocean(SST, Mixed-layer) Atmos GEM Ocean Ice NEMO+ CICE 00 UTC 06 UTC 12 UTC 18 UTC Atm,Oce,Ice Working towards: [...] concentration (passive microwave, ASCAT, ice charts, soon SAR) Used for initializing coupled ice-ocean and ice-ocean-atmosphere forecasts for NWP – thickness unconstrained Now developing own ice thickness as

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