University of Cambridge > Talks.cam > British Antarctic Survey - Polar Oceans seminar series > The bottom-intensification of mixing causes large, almost cancelling, abyssal upwelling and downwelling

  Browse A-Z

Log in

University Account External (via Google)

🔐 Log In

Information on

Subscribing to talksdetails Finding a talkdetails Adding a talkdetails Disseminating talksdetails Help and Documentationdetails

ℹī¸ Information

The bottom-intensification of mixing causes large, almost cancelling, abyssal upwelling and downwelling

Download to your calendar using vCal

If you have a question about this talk, please contact Dr Peter Davis .

If external to BAS, please email Dr Andrew Meijers (andmei@bas.ac.uk) in advance to gain access to the building

The bottom-intensification of diapycnal mixing in the abyssal ocean is studied using a simple buoyancy budget, showing that the interior of the ocean exhibits strong diapycnal downwelling, while there is strong dianeutral upwelling in very thin continental bottom boundary layers. For a given amount of Antarctic Bottom Water which is upwelled through neutral density surfaces in the abyssal ocean (between 2000m and 5000m) up to five times this volume flux is upwelled in narrow turbulent sloping bottom boundary layers, while up to four times the net upward volume transport of Bottom Water flows downward across isopycnals in the near-boundary stratified ocean interior. We conclude that the Stommel-Arons circulation of the abyssal ocean bears little relation to reality.

The second part of the talk will discuss the melting and re-freezing under ice shelves, demonstrating the application of TEOS -10 to this region of the ocean/ice.

This talk is part of the British Antarctic Survey - Polar Oceans seminar series series.

This talk is included in these lists:

Note that ex-directory lists are not shown.

Other lists

FW 11, Willam Gates Hall. Zoom link: https://cl-cam-ac-uk.zoom.us/j/4361570789?pwd=Nkl2T3ZLaTZwRm05bzRTOUUxY3Q4QT09&from=addon Anglia Ruskin University, East Road, Recital room Hel 029 Online link to follow

Other talks

Polar Oceans Seminar Talk Online Causal Inference Seminar In conversation: Louis Herns Marcelin and Ola Osman on legacies of enslavement and contemporary violence in Liberia and Haiti Morning Tea and Coffee Group Presentation 5 TBC
 

Š 2006-2025 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity