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SUMMARY:Observing the Southern Ocean carbon cycle with autonomous floats -
  Channing Prend\, Scripps Institution of Oceanography/University of Washin
 gton
DTSTART:20221102T140000Z
DTEND:20221102T150000Z
UID:TALK174386@talks.cam.ac.uk
CONTACT:Dr. Shenjie Zhou
DESCRIPTION:The Southern Ocean plays an outsized role in the global overtu
 rning circulation and climate system by transporting mass\, heat\, and tra
 cers between basins\, as well as between the surface and abyssal oceans. C
 onsequently\, the Southern Ocean accounts for a disproportionately large p
 ercentage of the total oceanic carbon uptake. Historically\, studying the 
 Southern Ocean has been limited by the paucity of observational data from 
 this remote environment. However\, recent advances in autonomous float tec
 hnology have provided unprecedented spatial and temporal coverage of subsu
 rface biogeochemical (BGC) measurements in the region. In this talk\, I wi
 ll discuss two studies that leverage BGC Argo data to investigate the Sout
 hern Ocean carbon cycle. The first study examines zonal asymmetry in air-s
 ea carbon fluxes. We show that carbon outgassing occurs preferentially in 
 the Indo-Pacific sector of the Southern Ocean due to regional differences 
 in the mixed-layer entrainment of upwelled carbon-rich deep water. The sec
 ond study characterizes meridional variations in the phasing of the pCO₂
  seasonal cycle and links these to changes in the annual range of sea surf
 ace temperature\, which in turn is closely related to the mixed-layer dept
 h distribution. Together\, these studies illustrate both the advantages an
 d challenges of using float data to investigate carbon system parameters. 
 Understanding these pros and cons is necessary to effectively use the data
  and integrate it into the larger global ocean observing system
LOCATION:https://ukri.zoom.us/j/91769463955\; BAS seminar room 1
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