Storfjorden (Spitsbergen) Seismic Process and Its Time Patterns
Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth,...
-
Upload
sydnee-wellings -
Category
Documents
-
view
215 -
download
0
Transcript of Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth,...
![Page 1: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/1.jpg)
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
![Page 2: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/2.jpg)
Biggs et al. 2000
Smedsrud and Skogseth (2006)
![Page 3: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/3.jpg)
![Page 4: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/4.jpg)
Frazil collection thickness & Wind speed
Björk (2000) no length dependancy
Alam & Curry 1998
Frazil forms > 4.5 m/s wind !!
![Page 5: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/5.jpg)
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
![Page 6: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/6.jpg)
(km)
WestEast (Kapp Lee)
South
![Page 7: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/7.jpg)
Scottish Association for Marine Science (SAMS)Ice drifting buoys.
Jeremy Wilkinson andDuncan Mercer (SAMS)
![Page 8: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/8.jpg)
![Page 9: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/9.jpg)
Budgell (2005)
Boundary forcing and initialization from large scale Atlantic ROMS runs
Sea ice concentration
Sea surface temperature
![Page 10: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/10.jpg)
Model ice thickness 'validation'
- a polynya closing event
![Page 11: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/11.jpg)
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)
![Page 12: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/12.jpg)
Wind forcing
0.3 N/m²equals
12-15 m/s
NCEP forcing,Δx = 250 km
Surface fluxesreflects NCEPice cover
[W/m²]
![Page 13: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/13.jpg)
Storfjorden defined by
Polynya area calculated inside the limited area
Typical polynya width of 20 km
February 2000 mean ice thickness
[ m ]
![Page 14: Sea ice measurements and modelling of the Storfjorden polynya Lars H. Smedsrud, Ragnheid Skogseth, W. Paul Budgell, Frank Nilsen, Alastair D. Jenkins,](https://reader036.fdocuments.in/reader036/viewer/2022062620/551a6f9c550346545e8b6056/html5/thumbnails/14.jpg)