Post on 31-Mar-2015
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. 2000
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 2. 2006
(km)
WestEast (Kapp Lee)
South
Scottish Association for Marine Science (SAMS)Ice drifting buoys.
Jeremy Wilkinson andDuncan 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 February2000
Sea ice classification and polynya area detected by SAR
Skogseth et al (2004)
Mean icethickness<0.3m = polynya
ROMS model resultsSmedsrud et al (2006)
Wind forcing
0.3 N/m²equals
12-15 m/s
NCEP forcing,Δx = 250 km
Surface fluxesreflects NCEPice 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 ]