My research focuses on physical exchange processes occurring at the interface between the ocean and atmosphere. In particular, I have focused on understanding the occurrence, scale and severity of air-entraining breaking waves using data collected from both laboratory and field experiments. I also have a keen interest in how turbulence in the upper ocean responds to atmospheric forcing such as wind stress, buoyancy fluxes and wave breaking.
I joined the department of Civil and Environmental Engineering at Imperial College London as senior lecturer in November 2017. I have also been a Royal Society Shooter International Research Fellow at Imperial College since January 2017. Before this I worked as a postdoctoral researcher and then as an Assistant Project Scientist at the Scripps Institution of Oceanography. I completed my Ph.D. in Physical Oceanography in 2009 at the National Univeristy of Ireland, Galway.
I am currently building my research group within the department of Civil and Environmental Engineering at Imperial College. If you are interested in pursuing a graduate or post-graduate project related to ocean-atmosphere interaction please contact me to discuss possible options.
Padilla E, Cao R, Callaghan AH, 2023, Spatial Interpolation of wave fields based on limited spatial measurements, Ieee Journal of Oceanic Engineering, ISSN:0364-9059
Callaghan A, 2018, On the relationship between the energy dissipation rate of surface-breaking waves and oceanic whitecap coverage, Journal of Physical Oceanography, Vol:48, ISSN:0022-3670, Pages:2609-2626
Callaghan AH, Deane GB, Stokes MD, 2017, On the imprint of surfactant-driven stabilization of laboratory breaking wave foam with comparison to oceanic whitecaps, Journal of Geophysical Research: Oceans, Vol:122, ISSN:2169-9275, Pages:6110-6128
et al., 2017, Estimation of bubble-mediated air–sea gas exchange from concurrent DMS and CO2 transfer velocities at intermediate–high wind speeds, Atmospheric Chemistry and Physics, Vol:17, ISSN:1680-7316, Pages:9019-9033