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SUMMARY:Calibration of a Coupled Ice-Ocean Model of West Antarctica - Brad
  reed and Jan De Rydt - Jan De Rydt (University of Northumbria)\, Brad Ree
 d (University of Northumbria)
DTSTART:20251015T130000Z
DTEND:20251015T140000Z
UID:TALK236698@talks.cam.ac.uk
CONTACT:Katherine Turner
DESCRIPTION:The West Antarctic Ice Sheet has experienced sustained mass lo
 ss over the past three decades\, a trend projected to continue in future c
 limate scenarios. This loss is primarily driven by basal melting along the
  Amundsen Sea coast\, where warm ocean waters interact with floating ice s
 helves. Internal ice dynamics further modulate the ice sheet’s response 
 to ocean forcing\, highlighting the need for coupled modelling approaches.
 \n\n\nIn this study\, I present the calibration of a new coupled ice-ocean
  model of West Antarctica\, covering the region from the Abbot to the Getz
  basins\, including key glaciers such as Pine Island and Thwaites. The ice
  sheet component is simulated using the ice-flow model Úa\, optimised in 
 two stages to match present-day conditions. This is coupled offline to the
  MIT general circulation model (MITgcm)\, which incorporates sea ice and i
 ce shelf thermodynamics and is driven by historical atmospheric reanalyses
 .\n\n\nWe assess the sensitivity of the coupled model hindcast to melt rat
 e parameters in MITgcm and calibrate it against observations of basal melt
  rates\, and changes in ice velocity and ice thickness over recent decades
 . This represents the first such calibration using both oceanic and glacio
 logical observations. The results presented here will inform optimal melt 
 parameters for other models. Additionally\, our historically calibrated mo
 del will be used to predict future sea level contributions and help us to 
 better constrain the complex interplay between ice dynamics and ocean forc
 ing in West Antarctica.\n\nLink to the teams meeting: https://teams.micros
 oft.com/l/meetup-join/19%3ameeting_MjE5MmIxMGYtNzllMC00MmNlLTlhMDMtMmE1MWJ
 jNGVmNzQ4%40thread.v2/0?context=%7b%22Tid%22%3a%22b311db95-32ad-438f-a101-
 7ba061712a4e%22%2c%22Oid%22%3a%229a5b5150-2ddd-43f0-9054-966647264d30%22%7
 d \n\n*PLEASE NOTE*\nIf you are external to BAS and wish to attend please 
 email the organisers in advance so they can organise to meet you in recept
 ion !!!
LOCATION:BAS Seminar Room 2
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