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2002 LAPCOD Meeting
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Mid-depth circulation in the North Atlantic using an inverse model applied to floats derived velocities.
Vincent Faure, Kevin G. Speer
Florida State University
faure@ocean.fsu.edu(Abstract received 10/31/2002 for session A)
ABSTRACT
An inverse model is used to map the Eulerian velocity field from a variety of drifters in the North Atlantic. The sources include Palace floats at 1500 db, Marvor floats at 1750 db, Arcane and SFB floats at 1500 db. Other constraints are used as well, derived from fixed current meters in boundary currents. The proposed technique is to average all the velocity measurements into regular boxes which are used to set the model constraints. 2-D mass conservation and `topographic steering' are included in the model in order to generate a smooth stream function along with error estimates. The problem of the choice of noise and assumed horizontal divergence of flow arises as well as choices of the boundary conditions. The results are compared to standard objective analysis technique.
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2002 LAPCOD Meeting, Key Largo, Florida, December 12-16, 2000