Wallcraft Headshot

Research Scientist
Center for Ocean-Atmospheric Prediction Studies

Rm. 278

(850) 644-4581 phone
(850) 644-4841 fax

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My research interests include: The numerical solution of finite difference and finite volume forms of partial differential equations, and their application to the development of eddy resolving numerical ocean circulation models. Ocean model design, development and maintenance. Application of scalable supercomputers to numerical ocean modeling. Model coupling. In October 2017, I joined COAPS as a Research Scientist after 37 years working with and for the Naval Research Laboratory in support of the Navy's global ocean prediction systems. I am the lead developer of the HYbrid Coordinate Ocean Model (HYCOM). The hybrid coordinate extends the geographic range of applicability of traditional isopycnic coordinate circulation models toward shallow coastal seas and unstratified parts of the world ocean. The vertical coordinate in HYCOM is isopycnal in the open, stratified ocean, but smoothly reverts to a terrain-following coordinate in shallow coastal regions, and to pressure coordinates in the mixed layer and/or unstratified seas. It does this using the Arbitrary Lagrangian-Eulerian (ALE) method in the vertical. HYCOM pioneered the use of ALE in ocean models, and several other ocean models have since adopted this technique.