Helgoland
In the 18th Coastal Summer School 16 young scientists from nine nations visiting the North Sea island Helgoland for eleven days. The aim of the project is to deepen their knowledge of coastal

) ● SIV over West Laptev Sea region highly sensitive to same variables, but mainly in region 6 17eolab.dk y = N(x) σ2(y) = N' C(x) N'T + σ2(y mod ) ● SIV over East Siberian Sea region highly sensitive to [...] state, ● forcing, ● process parameters y: target quantity ● Could be anything that is modeled ● Here: sea ice volume and snow volume Quantitative Network Design: 2-Step Procedure Some state variable of the [...] ) σ(y 0 ) x: control vector ● initial state, ● forcing, ● process parameters y: target quantity ● sea ice volume ● snow volume d = M(x) C(x) = (M'T C(d)-1 M' + C(x 0 )-1)-1 5eolab.dk time C(x) C(d 2 )

Antarctica, Siberia and North America. Removes singularities on the ocean points Resolution roughly around 0.25 degree globally 4 European Centre for Medium-Range Weather Forecasts Coupling sea ice in the IFS Coupling [...] a dynamic-thermodynamic sea ice model Implementation both at medium and monthly to seasonal timescales have been largely neutral for the large scale circulation The dynamic sea ice model does allow the [...] PowerPoint Presentation NWP with a thermodynamic-dynamic sea ice model Sarah Keeley & Kristian Mogensen Coupled Processes Team, ECMWF © ECMWF June 24, 2019 Persistence – not a good assumption, especially

primarily been used to map the land-sea mask of the MPIOM to ECHAM5 (H. Haak, per- sonal communication). 2.2 The Finite Element Sea Ice-Ocean Model (FESOM) The sea ice-ocean component in the coupled system [...] primarily been used to map the land-sea mask of the MPIOM to ECHAM5 (H. Haak, per- sonal communication). 2.2 The Finite Element Sea Ice-Ocean Model (FESOM) The sea ice-ocean component in the coupled system [...] primarily been used to map the land-sea mask of the MPIOM to ECHAM5 (H. Haak, per- sonal communication). 2.2 The Finite Element Sea Ice-Ocean Model (FESOM) The sea ice-ocean component in the coupled system

navigation in ice infested waters ● Retreating sea ice in the Arctic gives a potential for commercial ship traffic at high latitudes ● Northern sea route from North Sea ports to the Far East is ~40% shorther than [...] assimilated product: OSISAF sea ice 9th IICWG-DA, Bremen 2019-06-17 - 199th IICWG-DA, Bremen 2019-06-17 - 19 OSISAF vs ice charts Impact of assimilated product: OSISAF sea ice 9th IICWG-DA, Bremen 2019-06-17 [...] Displacement between ice edge grid cells in model results and observations 2. Area of mismatching sea ice extent in model results and observations 3. Ice edge position skill as a function of horizontal

3DVar-FGAT with 5-day window (in-situ profiles, sea-level anomalies, SST) – Sea ice univariate 3DVar-FGAT of sea-ice concentration from passive microwave • Arctic sea-ice forecasts more skilful (Zampieri 2018) [...] seasonal sea-ice cover more important for sub-seasonal predictions ORAS5 – CS2SMOS Average sea-ice thickness in March 2011-2015 m m October 29, 2014 Initializing sub-seasonal forecasts with CS2SMOS sea-ice [...] applied from November to March • Impact of sea-ice thickness on sea-ice concentration largest in melt season 7 October 29, 2014 Impact of CS2SMOS initialization on sea ice forecasts: March - June 8 Spatially

thickness redistribution modeling h2 h1 Thermodynamic growth Dynamic growth 3 Haas, Sea Ice Book, 2017 Results: Sea ice thickness distribution Thickness distribution of the Polynya after one month 0.9 [...] 20190617_chaas_albedyll_16_9 Thickness and Deformation in the 2018 North Greenland Polynya Haas C., L. v. Albedyll, S. Hendricks, T. Krumpen, F. Kauker, J. Rohde Feb 13 – Mar 31, 2018 70°0'0"E95°0'0"E [...] 9 m grown thermodynamically (mode) dynamic processes doubled the ice thickness to 1.94 m 4 Haas, Sea Ice Book, 2017 Thermodynamic growth Modelled thickness 0.95 m Level and deformed ice 5 10 15 20 km z

Sascha Willmes, Fabian Reiser, Günther Heinemann Environmental Meteorology High-resolution daily sea-ice concentration from MODIS thermal infrared imagery, 2002-2019: Current status and available products [...] from MODIS TIR data Environmental Meteorology SIC from Potential Open Water Ice Surface Temperature Sea Ice Concentration Potential artefacts BUT: Masking temperature anomaly artefacts is crucially important [...] straight-forward, BUT: IST artefacts (mostly due to unrecognized clouds) cause low SIC areas, where sea ice was actually present. An additional masking is necessary 3 Environmental Meteorology Approach:

ice-covered Fram Strait between Greenland and Svalbard, which they call their HAUSGARTEN. The deep-sea observatory is the first, and still the only one of its kind for year-round physical, chemical and

dynamo.html _blank>Click here for further information January 2019 2019 is a big year for the North Sea Benthos time series. The time series, which was initiated by Eike Rachor in 1969 turns 50 this year