1 / 7

Transport Processes: Advection, Transport Budgets, and Flux

This reading explores the concepts of advection, transport budgets, and flux in the context of heat and salt transport in the ocean. Topics covered include the surface heat balance, Gulf Stream advection, diffusion by eddies, continuity, and conservation of volume, salt, and freshwater. Adapted from Dr. Lynne Talley’s SIO class notes.

anthonyirvin
Download Presentation

Transport Processes: Advection, Transport Budgets, and Flux

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MAST602: Advection, transports, budgets Reading: Knauss Chapter 4 Flux, transport Radiation, Advection, Diffusion Conservation of volume Continuity Conservation of salt Freshwater transport Heat budget Heat transport Adapted from Dr. Lynne Talley’s SIO class notes

  2. Transport processes In lieu of an animation, pretend that this is animated. (1) The surface heat balance, including radiation, makes the ocean warmer to the south. (2) The Gulf Stream flows northward, advectting warm water. (3) Eddies diffuse the heat.

  3. Continuity

  4. Transport Velocity times concentration integrated (summed) over area normal to the velocity (same as Flux normal to an area integrated over that area.) Flux of a property Velocity times concentration (same as Transport per unit area) Flux and transport

  5. Transport definitions • Volume = integral of velocity v m3/sec • Mass = integral of density x velocity v kg/sec • Heat = integral of heat x velocity cpTv J/sec=W • Salt = integral of salt x velocity Sv kg/sec • Freshwater = integral of Fwater x velocity (1-S)v kg/sec • Chemical tracers = integral of tracer x velocity Cv moles/sec • Where “integral” is the over the area normal to the velocity • Flux is just these quantities per unit area

  6. Conservation of volume, salt and freshwater • (1) Mass conservation:  oVo - i Vi = (R + AP) - AE  F • (2) Salt conservation: Vii Si = Vo o So • (3) F = i Vi (Si /So - 1) or F =  o Vo (1 – So /Si ) • (4) Also from (2), Vii Si /Sm = Vo o So / Sm where Sm is a mean salinity, so • (5) F = i Vi (1- Si /Sm ) -  o Vo (1 - So / Sm) which is useful if we have to assume that i Vi ~  o Vo given error in observations

  7. Mediterranean and Black Seas Evaporative basin Runoff/precipitation

More Related