BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:High-frequency fluctuations in Antarctic Bottom Water transport dr
 iven by Southern Ocean winds - Andrew Stewart\, University of California\,
  Los Angeles
DTSTART:20211103T153000Z
DTEND:20211103T163000Z
UID:TALK163018@talks.cam.ac.uk
CONTACT:Dr. Shenjie Zhou
DESCRIPTION:Northward flow of Antarctic Bottom Water (AABW) across the Sou
 thern Ocean comprises a key component of the global overturning circulatio
 n. Yet AABW transport remains poorly constrained by observations and state
  estimates\, and there is presently no means of directly monitoring any co
 mponent of the Southern Ocean overturning. However\, AABW flow is dynamica
 lly linked to Southern Ocean surface circulation via the zonal momentum ba
 lance\, offering potential routes to indirect monitoring of the transport.
  Exploiting this dynamical link\, this study uses a dynamically self-consi
 stent ocean state estimate (ECCOV4r4) to show that wind stress fluctuation
 s drive large AABW transport fluctuations on time scales shorter than ~2 y
 ears\, which comprise almost all of the transport variance. This connectio
 n occurs due to differing time scales on which topographic and interfacial
  form stresses respond to wind variability\, likely associated with differ
 ences in barotropic vs. baroclinic Rossby wave propagation. These findings
  imply that AABW transport variability can largely be reconstructed from t
 he surface wind stress alone.
LOCATION:British Antarctic Survey\, Zoom
END:VEVENT
END:VCALENDAR