144
V. Commodari, S. Pierini
Ax=Ay=2 km (Fig. 6). The bathymetry was obtained by a databank with resolution of only 7'30" in both latitude and longitude, so in order to hâve a satisfactory resolution in Terra Nova Bay the bathymétrie data were complemented by
additional data digitized from bathymétrie charts with a resolution of 1 mile in
both directions. The model was forced both by a boundary forcing and the wind.
The nearly steady State obtained asymptotically by resolving the initial-boundary value problem forced by the wind in the run of Fig. 3 (with the coarse resolution of 20 km) was used to define steady boundary conditions to be imposed
along the "open" latéral boundaries of the domain (Fig. 6). An interpolation was
performed by means of a cubic spline onto the higher resolution grid of 2 km.
An easterly wind of 15 m/s was also imposed. The stationary circulation is given
in Fig. 7: the cyclonic structure évident in the response is basically a zooming of
the strong jet présent along the western coast of the Ross Sea (Fig. 3b), while a
small-scale anticyclonic structure appears to interest Terra Nova Bay. The effect
of the local wind is found to be negligible compared with the boundary forcing,
which, however, is itself the resuit of the effect of large-scale winds. In conclusion, an even higher resolution model, whose topography is not yet available,
would be required to résolve the circulation in a région of limited extent such as
Terra Nova Bay.
Acknowledgenients. This research was funded by the Italian National Programme
for Antarctic Research. The authors wish to thank G. Spezie, P. Picco, G. Budillon
and A. Bergamasco for valuable discussions.
References
1. Locarnini RA (1994) Water masses and circulation in the Ross gyre and environs. PhD dissertation, Texas A&M University
2. Huthnance JM (1984) Slope currents and "JEBAR". J Phys Oceanogr 14:795-810
3. Gill AE (1982) Atmosphere-ocean dynamics. Academie Press, New York
4. Pedlosky J (1987) Geophysical fluid dynamics. Springer-Verlag, New York
5. Pierini S (1996) Topographie Rossby modes in the Strait of Sicily. J Geophys Res 101:6429-6440
6. Pierini S, Simioli A (1998) A wind-driven circulation model of the Tyrrenian Sea area. J Mar Sys
18:161-178
7. Schwerdtfeger W (1984) Weather and climate in the Antarctic. Developments in atmospheric science. Elsevier, Amsterdam
8. Deacon G (1984) The Antarctic Circumpolar Océan. Cambridge University Press, Cambridge
9. Ainley DG, Jacobs SS ( 1981 ) Sea-bird affinities for océan and ice boundaries in the Antarctic. Deep
Sea Res 28A: 1173-1185
10. Moritz RE (1988) The Ross Sea data buoy project, 1986-88. Antarctic J. United States 23:78-80
11. Pillsbury RD, Jacobs SS (1985) Preliminary observations from long-term current meter moorings
near the Ross Ice Shelf, Antarctica. In: Oceanology of the Antarctica Continental Shelf. American
Geophysical Union, Washington, DC, pp 87-107
12. Bergamasco A, Demicheli L, Langone L, Manzella GMR, Meloni R, Picco P (1996) Analisi di sérié
temporali di corrente, temperatura e salinità nel Mare di Ross (Antartide) nell'anno 1995.
Associazione Italiana di Ocenologia e Limnologia, XII Congresso Nazionale
13. Picco P, Bergamasco A, Demicheli L, Langone L, Manzella GMR, Meloni R (1998) Current, température and salinity measurements in the Ross Sea Shelf (Antarctica) during 1995/1996: data présentation. Proceedings of the AIOL Congress, Genova 11:105-120
V. Commodari, S. Pierini
Ax=Ay=2 km (Fig. 6). The bathymetry was obtained by a databank with resolution of only 7'30" in both latitude and longitude, so in order to hâve a satisfactory resolution in Terra Nova Bay the bathymétrie data were complemented by
additional data digitized from bathymétrie charts with a resolution of 1 mile in
both directions. The model was forced both by a boundary forcing and the wind.
The nearly steady State obtained asymptotically by resolving the initial-boundary value problem forced by the wind in the run of Fig. 3 (with the coarse resolution of 20 km) was used to define steady boundary conditions to be imposed
along the "open" latéral boundaries of the domain (Fig. 6). An interpolation was
performed by means of a cubic spline onto the higher resolution grid of 2 km.
An easterly wind of 15 m/s was also imposed. The stationary circulation is given
in Fig. 7: the cyclonic structure évident in the response is basically a zooming of
the strong jet présent along the western coast of the Ross Sea (Fig. 3b), while a
small-scale anticyclonic structure appears to interest Terra Nova Bay. The effect
of the local wind is found to be negligible compared with the boundary forcing,
which, however, is itself the resuit of the effect of large-scale winds. In conclusion, an even higher resolution model, whose topography is not yet available,
would be required to résolve the circulation in a région of limited extent such as
Terra Nova Bay.
Acknowledgenients. This research was funded by the Italian National Programme
for Antarctic Research. The authors wish to thank G. Spezie, P. Picco, G. Budillon
and A. Bergamasco for valuable discussions.
References
1. Locarnini RA (1994) Water masses and circulation in the Ross gyre and environs. PhD dissertation, Texas A&M University
2. Huthnance JM (1984) Slope currents and "JEBAR". J Phys Oceanogr 14:795-810
3. Gill AE (1982) Atmosphere-ocean dynamics. Academie Press, New York
4. Pedlosky J (1987) Geophysical fluid dynamics. Springer-Verlag, New York
5. Pierini S (1996) Topographie Rossby modes in the Strait of Sicily. J Geophys Res 101:6429-6440
6. Pierini S, Simioli A (1998) A wind-driven circulation model of the Tyrrenian Sea area. J Mar Sys
18:161-178
7. Schwerdtfeger W (1984) Weather and climate in the Antarctic. Developments in atmospheric science. Elsevier, Amsterdam
8. Deacon G (1984) The Antarctic Circumpolar Océan. Cambridge University Press, Cambridge
9. Ainley DG, Jacobs SS ( 1981 ) Sea-bird affinities for océan and ice boundaries in the Antarctic. Deep
Sea Res 28A: 1173-1185
10. Moritz RE (1988) The Ross Sea data buoy project, 1986-88. Antarctic J. United States 23:78-80
11. Pillsbury RD, Jacobs SS (1985) Preliminary observations from long-term current meter moorings
near the Ross Ice Shelf, Antarctica. In: Oceanology of the Antarctica Continental Shelf. American
Geophysical Union, Washington, DC, pp 87-107
12. Bergamasco A, Demicheli L, Langone L, Manzella GMR, Meloni R, Picco P (1996) Analisi di sérié
temporali di corrente, temperatura e salinità nel Mare di Ross (Antartide) nell'anno 1995.
Associazione Italiana di Ocenologia e Limnologia, XII Congresso Nazionale
13. Picco P, Bergamasco A, Demicheli L, Langone L, Manzella GMR, Meloni R (1998) Current, température and salinity measurements in the Ross Sea Shelf (Antarctica) during 1995/1996: data présentation. Proceedings of the AIOL Congress, Genova 11:105-120