A thermodynamic model of the formation, growth, and decay for first-year sea ice
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OLR (1987)34 (I 2) A. Physical Oceanography 1027 ALSO. Internal waves and tides 87:6732 di Sarra, A., A. Pace and E. Salusti, 1987. Long internal waves and Column,=r ~ in the Strait of Messina. J. geophys. Res., 92(C6):6495- 6500. During a pilot cruise in the Strait of Messina we observed the interface time evolution between Atlantic and Levantine water layers due to semi- diurnal tides. Our data are in fairly good agreement with other models as regards long-lasting (1 hour or more) water movements. Quick transient pertur- bations of columnar shape (probably eddies), which we have called Bignami columns, were also observed and analyzed. Dept. of Phys., Univ. La Sapienza, Piazza Aldo Moro, 2, 1-00185 Rome, Italy. 87:6733 Jou, W.-H., 1987. Linear Instability of a short wave propagating in a long internal wave. Phys. Fluids, 30(6): 1708-1714. The linear inviscid instability of the flow field created by a long wave propagating along a thin mixing layer is considered here. The main interest is the modulation of the unstable short wave by the slowly varying unsteady and inhomogeneous shear flow. The analysis given in this work shows that there is a great disparity in the wave speeds of the primary and secondary waves. The full implication of the disparity in the wave speeds to the multiple- scale expansion is investigated and solutions to the equations derived for the slow scale are given. Flow Res. Co., Kent, WA 98032, USA. 87:6734 Jou, W.-H. and M.A. Weissman, 1987. A pertur- bation solution for long internal waves. Phys. Fluids, 30(6): 1699-1707. The propagation of a long internal wave along a stratified shear layer is examined using the method of inner-outer expansions, and the relationship between the discontinuous Kelvin-Helmholtz system and finite-amplitude internal waves propagating in a continuously stratified shear flow is demonstrated. Flow Res. Co., Kent, WA 98032, USA. 87:6735 Thorpe, S.A. and A.P. Haines (appendix), 1987. On the reflection of a train of finite-amplitude internal waves from a uniform slope. J. Fluid Mech., 178:279-302. Precise calculation of the effects of the process giving modification to an ambient wave spectrum by the reflection of component waves at a sloping boundary is hampered by a lack of knowledge of the nonlinear consequences of internal-wave reflection. This nonlinear aspect is addressed, with attention focused primarily on a two-dimensional wavetraln in a non-rotating semi-infinite fluid of uniform density gradient with motion in a vertical plane normal to an infinite inclined plane boundary. Dept. of Oceanogr., The University, Southampton SO9 5NH, UK. A210. Ice 87:6736 Gabison, R., 1987. A thermodynamic model of the formation, growffz, and decay for first-year sea Ice. J. Glaciol., 33(113):105-119. The model's sensitivity to changes in oceanic and atmospheric parameters is analyzed and compared with previous studies. For three Arctic locations, Cambridge Bay, Frobisher Bay, and Alert Inlet, the model's ability to simulate the annual cycle of first-year ice is assessed. Results are compared with available climatological data and discussed in terms of the main thermodynamic processes, and the combined effects of oceanic tides and sea-ice deterioration by melting. The model is effective in simulating the climatology of the first-year ice thickness at the three Arctic locations. Improved performance may be expected from additional research and application of flexural forcing of the ice by waves and tides, and deterioration of ice strength during melting. Meteorol. Serv. Res. Branch, Atmos. Environ. Serv., Downsview, ON M3H 5T4, Canada. 87:6737 Meese, D.A., A.J. Gow, P.A. Mayewski, Walter Ficklin and T.C. Loder, 1987. The chemical, physlcll and structural propmies of estu~ne ice in Great Bay, New Hmnpshlre. Estuar. coast. Shelf Sci~ 24(6):833-840. Glacier Res. Group, Univ. of New Hampshire, Durham, NH 03824, USA. 87:6738 Muszynski, Isabelle and G.E. Birchfield, 1987. A coupled marine ice-stream4ce-sheif model. J. Glaciol, 33(113):3-15. Evidence concerning the potential roles of marine ice flows in climatological changes from the Late Pleistocene to the present is reviewed. A scale analysis of marine ice stream flow coupled to a freely floating ice shelf (in two dimensions and ignoring thermodynamic effects) provides the basis for de- riving a simplified model of a coupled, fast-flowing
Transcript of A thermodynamic model of the formation, growth, and decay for first-year sea ice
OLR (1987) 34 (I 2) A. Physical Oceanography 1027
ALSO. Internal waves and tides
87:6732 di Sarra, A., A. Pace and E. Salusti, 1987. Long
internal waves and Column,=r ~ in the Strait of Messina. J. geophys. Res., 92(C6):6495- 6500.
During a pilot cruise in the Strait of Messina we observed the interface time evolution between Atlantic and Levantine water layers due to semi- diurnal tides. Our data are in fairly good agreement with other models as regards long-lasting (1 hour or more) water movements. Quick transient pertur- bations of columnar shape (probably eddies), which we have called Bignami columns, were also observed and analyzed. Dept. of Phys., Univ. La Sapienza, Piazza Aldo Moro, 2, 1-00185 Rome, Italy.
87:6733 Jou, W.-H., 1987. Linear Instability of a short wave
propagating in a long internal wave. Phys. Fluids, 30(6): 1708-1714.
The linear inviscid instability of the flow field created by a long wave propagating along a thin mixing layer is considered here. The main interest is the modulation of the unstable short wave by the slowly varying unsteady and inhomogeneous shear flow. The analysis given in this work shows that there is a great disparity in the wave speeds of the primary and secondary waves. The full implication of the disparity in the wave speeds to the multiple- scale expansion is investigated and solutions to the equations derived for the slow scale are given. Flow Res. Co., Kent, WA 98032, USA.
87:6734 Jou, W.-H. and M.A. Weissman, 1987. A pertur-
bation solution for long internal waves. Phys. Fluids, 30(6): 1699-1707.
The propagation of a long internal wave along a stratified shear layer is examined using the method of inner-outer expansions, and the relationship between the discontinuous Kelvin-Helmholtz system and finite-amplitude internal waves propagating in a continuously stratified shear flow is demonstrated. Flow Res. Co., Kent, WA 98032, USA.
87:6735 Thorpe, S.A. and A.P. Haines (appendix), 1987. On
the reflection of a train of finite-amplitude internal waves from a uniform slope. J. Fluid Mech., 178:279-302.
Precise calculation of the effects of the process giving modification to an ambient wave spectrum by the reflection of component waves at a sloping
boundary is hampered by a lack of knowledge of the nonlinear consequences of internal-wave reflection. This nonlinear aspect is addressed, with attention focused primarily on a two-dimensional wavetraln in a non-rotating semi-infinite fluid of uniform density gradient with motion in a vertical plane normal to an infinite inclined plane boundary. Dept. of Oceanogr., The University, Southampton SO9 5NH, UK.
A210. Ice
87:6736 Gabison, R., 1987. A thermodynamic model of the
formation, growffz, and decay for first-year sea Ice. J. Glaciol., 33(113):105-119.
The model's sensitivity to changes in oceanic and atmospheric parameters is analyzed and compared with previous studies. For three Arctic locations, Cambridge Bay, Frobisher Bay, and Alert Inlet, the model's ability to simulate the annual cycle of first-year ice is assessed. Results are compared with available climatological data and discussed in terms of the main thermodynamic processes, and the combined effects of oceanic tides and sea-ice deterioration by melting. The model is effective in simulating the climatology of the first-year ice thickness at the three Arctic locations. Improved performance may be expected from additional research and application of flexural forcing of the ice by waves and tides, and deterioration of ice strength during melting. Meteorol. Serv. Res. Branch, Atmos. Environ. Serv., Downsview, ON M3H 5T4, Canada.
87:6737 Meese, D.A., A.J. Gow, P.A. Mayewski, Walter
Ficklin and T.C. Loder, 1987. The chemical, physlcll and structural propmies of es tu~ne ice in Great Bay, New Hmnpshlre. Estuar. coast. Shelf Sci~ 24(6):833-840. Glacier Res. Group, Univ. of New Hampshire, Durham, NH 03824, USA.
87:6738 Muszynski, Isabelle and G.E. Birchfield, 1987. A
coupled marine ice-stream4ce-sheif model. J. Glaciol, 33(113):3-15.
Evidence concerning the potential roles of marine ice flows in climatological changes from the Late Pleistocene to the present is reviewed. A scale analysis of marine ice stream flow coupled to a freely floating ice shelf (in two dimensions and ignoring thermodynamic effects) provides the basis for de- riving a simplified model of a coupled, fast-flowing
