https://wiki.devclub.in/index.php?action=history&feed=atom&title=ASL823 2026-04-09T05:43:48Z Revision history for this page on the wiki MediaWiki 1.45.1 https://wiki.devclub.in/index.php?title=ASL823&diff=2108&oldid=prev 2026-03-04T10:21:06Z

<p>Creating course page via bot</p> <p><b>New page</b></p><div>{{Infobox Course<br /> | code = ASL823<br /> | name = Geophysical Fluid Dynamics<br /> | credits = 3<br /> | credit_structure = 3-0-0<br /> | pre_requisites = <br /> | overlaps = <br /> }}<br /> <br /> == ASL823 : Geophysical Fluid Dynamics ==<br /> (i) Fundamental concepts in geophysical fluid dynamics: equations of motion on a rotating planet, vorticity and circulation, conservation of potential vorticity, thermal wind, Taylor-Proudman theorem; Ertel-Rossby invariants; Ertel&#039;s potential vorticity conservation theorem; consequences of geostrophic and hydrostatic approximation. (ii) Shallow-water theory: derivation of shallow-water equations; derivation of vorticity equation; linearized form of shallow-water equations; plane waves in a layer of constant depth; dispersion diagrams of Kelvin and Poincaré waves. (iii) Rossby wave theory: mechanism of Rossby wave generation; inertial boundary currents; derivation of potential vorticity on beta-plane; quasigeostrophic scaling; Rossby waves in a zonal current; method of multiple scales for linear potential vorticity equation; reflection and radiation of Rossby waves; generation of Rossby waves by an initial disturbance; Quasigeostrophic normal modes in a closed basin; resonant interaction; energy and enstrophy conservation; upscale energy transfer. (iv) Friction effects in geophysical flows: Turbulent Reynolds stresses; Ekman layers in a homogeneous, incompressible rotating fluid; Ekman layer on a sloping surface; quasigeostrophic potential vorticity with friction and topography. (v) Instability theory: linear stability; normal modes; growth rates; baroclinic instability; Eady model and Charney model; instability in a two-layer model.</div>

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