BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Estimating efficiency and lengthscales of stratified mixing events
  from limited measurements - Alexis Kaminski (University of California\, B
 erkeley)
DTSTART:20240524T090000Z
DTEND:20240524T100000Z
UID:TALK215797@talks.cam.ac.uk
DESCRIPTION:Understanding how much mixing occurs in a stratified turbulent
  mixing event is a key question for understanding a variety of oceanic pro
 cesses. However\, directly measuring turbulent fluxes is difficult. Instea
 d\, parameterizations may be employed to estimate details of the mixing in
  terms of measurable quantities. One approach is to use characteristic len
 gthscales\, such as the Thorpe and Ozmidov scales\, to describe the state 
 of the flow\; relationships between such lengthscales can then in theory b
 e used to estimate turbulent quantities of interest. While this approach h
 as seen some success when applied to numerical simulations\, there remain 
 several challenges when it comes to using this approach in real observatio
 nal datasets &ndash\; for example\, the underlying mechanism driving the m
 ixing may not be known\, or the measurements may only come from isolated p
 rofiles in the larger flow. In this work\, we use a suite of direct numeri
 cal simulations of stratified shear instabilities as examples of both scou
 ring and overturning mixing events. We subsample the data to mimic oceanog
 raphic measurements and compute lengthscales from the individual profiles.
  In doing so\, we explore how well these profile-based estimates are able 
 to characterize the state of the turbulent flow\, particularly the mixing 
 efficiency\, and test how well fluxes can be computed from this limited da
 ta.&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR