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| Titel: |
The atmospheric environment service regional ice model (RIM) for operational applications |
| Auteur: |
Neralla, V. R. Jessup, R. G. Venkatesh, S. |
| Verschenen in: |
Marine geodesy |
| Paginering: | Jaargang 12 (1988) nr. 2 pagina's 135-153 |
| Jaar: |
1988 |
| Inhoud: |
This paper describes the development of and simulations with a regional scale sea ice dynamics model for obtaining short-range, real-time or near real-time predictions of ice conditions for operational use. This model is an adaptation of the seasonal sea ice dynamic/thermodynamic model developed at the Cold Regions Research and Engineering Laboratory (CRREL). It consists of (1) a momentum equation that includes air-to-ice stress, water-to-ice stress, internal ice stress, Coriolis force, and the pressure gradient force due to tilt of the sea surface; (2) a constitutive law that relates ice stress to strain rate and ice strength; and (3) continuity equations for ice thickness and concentration. For treating internal ice stress, the model uses a viscous-plastic constitutive law with plastic strength dependent on thickness and concentration. A finite difference numerical procedure is used for solving the equations. To obtain numerical simulations, the Regional Ice Model (RIM) is applied over the Beaufort Sea area using a 22 × 22 grid array with a grid distance of 42.3 km and a time step of 3 hours. Model simulations out to 48 hours are performed and the simulated drifts compared with buoy motion data collected during the period November-December, 1979. The comparisons show the simulated drift to be in reasonable agreement with observed buoy motions. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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