Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,

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Presentation transcript:

Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins, and Bjørn Ådlandsvik

Biggs et al Smedsrud and Skogseth (2006)

Frazil collection thickness & Wind speed Björk (2000) no length dependancy Alam & Curry 1998 Frazil forms > 4.5 m/s wind !!

Helicopter Electro Magnetic bird campaign, Storfjorden 2006 S. Hendricks and C. Haas (AWI) S. Gerland (NPI) L.H. Smedsrud (BCCR) F. Nilsen (UNIS) Flight track on May

(km) West East (Kapp Lee) South

Scottish Association for Marine Science (SAMS) Ice drifting buoys. Jeremy Wilkinson and Duncan Mercer (SAMS)

Budgell (2005) Boundary forcing and initialization from large scale Atlantic ROMS runs Sea ice concentration Sea surface temperature

Model ice thickness 'validation' - a polynya closing event

3 February 2000 Sea ice classification and polynya area detected by SAR Skogseth et al (2004) Mean ice thickness <0.3m = polynya ROMS model results Smedsrud et al (2006)

Wind forcing 0.3 N/m² equals m/s NCEP forcing, Δx = 250 km Surface fluxes reflects NCEP ice cover [W/m²]

Storfjorden defined by Polynya area calculated inside the limited area Typical polynya width of 20 km February 2000 mean ice thickness [ m ]