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SUMMARY:The variability of the Southern Ocean’s circulation and carbon c
 ycle: New insights from autonomous observations - Alison Gray\, University
  of Washington
DTSTART:20241113T150000Z
DTEND:20241113T160000Z
UID:TALK221194@talks.cam.ac.uk
CONTACT:Dr Yohei Takano
DESCRIPTION:The Southern Ocean plays a fundamental role in the global clim
 ate system\, dominating the oceanic uptake of heat and anthropogenic carbo
 n\, primarily due to its unique large-scale circulation. However\, the rem
 ote and extreme conditions found there make the Southern Ocean perpetually
  one of the most difficult places on the planet to observe and to model\, 
 resulting in significant and persistent uncertainties in our knowledge of 
 both the dynamics and the carbon cycle. Advances in using autonomous profi
 ling floats to observe the open Southern Ocean\, as well as the marginal s
 ea ice zone\, now enable the collection of subsurface physical and biogeoc
 hemical measurements with unprecedented data coverage in space and time. T
 his seminar will present some new insights resulting from the analysis of 
 these observations together with data from satellites and numerical models
 . The physical circulation is investigated using estimates of the horizont
 al flows in the upper portion of the Southern Ocean as well as mesoscale v
 ertical velocities near 1000 m\, with an emphasis on the impact of standin
 g meanders of the Antarctic Circumpolar Current. The influence of these st
 anding meanders on biogeochemical cycling in the region is then examined a
 nd compared to the representation in several different numerical simulatio
 ns.  I conclude by discussing implications of these findings for how we o
 bserve\, model and ultimately understand the circulation and carbon cycle 
 of the Southern Ocean.  
LOCATION:BAS Seminar Room 2\; https://bas-ac-uk.zoom.us/j/96237974459
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