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.
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
Callaghan AH, Deane GB, Stokes MD, 2016, Laboratory air-entraining breaking waves: imaging visible foam signatures to estimate energy dissipation, Geophysical Research Letters, Vol:43, ISSN:0094-8276, Pages:11320-11328
Deane GB, Stokes MD, Callaghan AH, 2016, The saturation of fluid turbulence in breaking laboratory waves and implications for whitecaps, Journal of Physical Oceanography, Vol:46, ISSN:0022-3670, Pages:975-992