Mixing measurements in the Bay of Bengal
Inertial-gravity waves in the equatorial Pacific
Satellite observations give humanity an unprecedented detailed look at the surface ocean. The vertical structure of variability associated with surface signals is relatively less known, and the relevance of theoretical structures derived using strict assumptions is debated; viz., the so-called baroclinic vertical modes.
Motivated by the [zonal wavenumber]-frequency spectra of dynamic height calculated by Farrar & Durland (2012) — see image on right — my goal is to infer the vertical structure of 7-day period inertial-gravity waves in the equatorial Pacific (filter band marked by horizontal lines). I am using long term subsurface temperature measurements and inferred dynamic height from the TAO/TRITON project.
Shelf-water export by mesoscale eddies
My dissertation looked at the interaction of deep-ocean mesoscale eddies with continental shelf-slope topography.
When visualized using passive tracer fields (red tracks eddy water and blue, shelf-slope water), the interaction clearly results in the formation of smaller-scale secondary vortices. We term these 'stacked' vortices to reflect their (unexpected) vertical structure wherein shelf-slope water is stacked over eddy water.
Contact me for copies if you need them.
- Cherian D.A., Brink K.H. 2016. Offshore Transport of Shelf Water by Deep-Ocean Eddies. Journal of Physical Oceanography. 46 3599–3621
- Haine T.W.N., Cherian D.A. 2013. Analogies of Ocean/Atmosphere Rotating Fluid Dynamics with Gyroscopes: Teaching Opportunities. Bull. Amer. Meteor. Soc.. 94:684.
- Brink K.H., Cherian D.A. 2013. Instability of an idealized tidal mixing front: Symmetric instabilities and frictional effects. Journal of Marine Research. 71(6):26.
While at MIT, I took the semester-long Teaching Certificate Program. I learned that it is generally more effective to have students work through a derivation primarily on their own in class with hints. Following that advice, I created worksheets that guide students through a derivation, guiding them toward important implications and reasoning for various steps. Here are the ones I have so far.
- Rossby adjustment
- Non-hydrostatic internal waves
- Sverdrup balance - for MIT's 12.808 - Observational Physical Oceanography
Any comments you might have on these are welcome. Please send me an email.
Office Address: Burt 434, OSU, Corvallis SSR, OR