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SUMMARY:Polar Oceans Seminar Talk - Andrew Styles - Speaker to be confirme
 d
DTSTART:20260318T140000Z
DTEND:20260318T150000Z
UID:TALK242128@talks.cam.ac.uk
CONTACT:Katherine Turner
DESCRIPTION:Away from the continental boundaries\, the variability of the 
 global ocean is frequently dominated by eddies. Despite this interior chao
 s\, ocean boundary pressures on opposing sides of a basin can vary coheren
 tly on interannual to decadal timescales while exhibiting large-scale spat
 ial structure. As part of the OceanBound project\, we use an adjoint model
  to directly quantify the drivers of variability in Atlantic boundary pres
 sures and the associated basin-wide geostrophic transport. The Atlantic Me
 ridional Overturning Circulation (AMOC) is the overall effect of basin-wid
 e meridional transport in the Atlantic and is a central component of the c
 limate system. We use an adjoint modelling framework to investigate the f
 orcings and relevant timescales behind the interannual variability of the 
 basin-wide geostrophic transport in the subtropical North and South Atlant
 ic. We find that a combination of wind-driven and heat-driven variability\
 , operating on a maximum timescale of 10 years\, can explain 79-94% of the
  variability exhibited by the model. Wind-driven variability is mostly int
 erannual and essential in all cases (64-88% explained variability). The he
 at-driven variability is largely decadal and only noticeable in the subtro
 pical North Atlantic (48-52% explained variability). We then identify a ro
 gues' gallery of four spatial patterns of sensitivity that are relevant to
  our reconstructions.
LOCATION:BAS Seminar Room 2
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