Fellow
Geophysical Fluid Dynamics
Earth Physics
Research School of Earth Science
(College of Physical Sciences)

 

Professional Background

 

Research and Teaching Interests

My research interests centre on physical processes governing the ocean and climate. This includes:

Ocean Eddies: Ocean eddies are small scale (10-100km) vortices which occur in all regions of the ocean. Despite their small size, they can have significant impacts on large scale ocean circulation — and climate.

Ocean Straits: Flow through ocean straits (such as the Straits of Gibraltar) are energetic and nonlinear, producing strong turbulence and mixing.

Glacial Climates: One of the outstanding puzzles in paleoclimatology is to determine the cause of ice ages.

Shear Instability: Flow in a density stratified can be unstable because of velocity gradients in the fluid. The resulting "shear instability" produces vortices (such as the Kelvin-Helmholtz billow shown here) and turbulence.

Notable publications

W. K. DEWAR & A. McC. HOGG (2009). Inviscid dissipation of balanced flow. Ocean Modell., In Press

A. McC. HOGG, W. K. DEWAR, P. BERLOFF, S. KRAVTSOV & D. K. HUTCHINSON (2009). The effects of mesoscale ocean-atmosphere coupling on the large-scale ocean circulation. J. Climate, In Press.

J. NYCANDER, A. McC. HOGG & L. M. FRANKCOMBE, (2008). Open boundary conditions for nonlinear shallow water models. Ocean Modell., doi:10.1016/j.ocemod.2008.06.003

T. PRASTOWO, R. W. GRIFFITHS, G. O. HUGHES & A. McC. HOGG, (2008). Mixing in exchange flows through a horizontal constriction. J. Fluid Mech., 600, 235-244. A. McC. HOGG, (2008). Glacial Cycles and Carbon Dioxide: A conceptual model. Geophys. Res. Lett., 35, L01701, doi:10.1029/2007GL032071.