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:

winter. We’ll be north of the 80 th parallel the entire time, and for much of it, we’ll even be in the direct vicinity of the North Pole, above the 87 th parallel. That’s so far north that we’ll hardly [...] enough? And why does it have to be a whole year? When we think about the Arctic, we often picture the North Cape or Svalbard. We can easily reach both regions the whole year round, but they’re located comparatively [...] ice-drift approach. It was a truly pioneering achievement; no-one before him had ever been so far north. But the scientific measurements were still very rudimentary; the instruments chiefly consisted of

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

between the atmosphere, ocean and sea ice, as well as on the ecosystem. Thanks to the collaboration between international experts, the one-year-long ice drift past the North Pole will take climate research

F. M. Bréon (2005), Remote sensing of phytoplankton groups in case 1 waters from global SeaWiFS imagery. Deep Sea Research, Part I, 52. Blum, M., Rozanov, V., Burrows, J., and Bracher, A. (2012). Coupled [...] SCIAMACHY ------- SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY SeaWiFS ------------ Sea-viewing Wide Field-of-view Sensor SIF-marine --------- Sun-induced marine chlorophyll-a [...] phytoplankton and spectral light absorption by colored detrital matter from water‐leaving radiances at SeaWiFS channels in a continental shelf region off Brazil. Limnology and Oceanography: Methods, 4(7): 237-253

ment reconstructions. His working areas are in the North Sea, Arctic and Antarctica. He spent considerable time on research vessels in the North Sea and the polar areas and 4 months in the Argentinian [...] key-players in the North Sea Office, in the interface of science and society. Dr. Christian Hass leads the coastal geology working group at the Alfred Wegener Institute, Wadden Sea Research Station in [...] intra-annual and inter-annual variation in the marine environment. Based on the examples of the North Sea system and Helgoland Roads we are investigating basic statistical characteristics (concepts) of