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SUMMARY: Exploring the Impact of Changing Overturning Circulation on Carbo
 n Storage due to the Biological Carbon Pump: An Idealised Modelling Approa
 ch - Elisavet Baltas\, University of Cambridge
DTSTART:20250611T130000Z
DTEND:20250611T140000Z
UID:TALK228580@talks.cam.ac.uk
CONTACT:Dr Yohei Takano
DESCRIPTION:Compelling evidence indicates that ocean circulation is underg
 oing significant changes due to global warming. These changes include redu
 ced ocean ventilation caused by increased stratification and the weakening
  of the Atlantic Meridional Overturning Circulation (AMOC). Consequently\,
  this will alter carbon\, oxygen\, heat and nutrient distribution\, and wi
 ll therefore affect primary production and\, by extension\, the biological
  carbon pump. Due to the ocean’s huge capacity for carbon storage\, it i
 s imperative that we understand the consequences of these changes.\n\nTo e
 xamine how ocean ventilation influences the biological carbon pump and ove
 rall oceanic carbon storage\, an idealised box model of ocean carbon and h
 eat uptake is extended to include biological processes and nutrient cyclin
 g. The model includes a thermocline with a dynamically controlled thicknes
 s and meridional overturning circulation\, both of which vary with increas
 ing temperatures\, determining the extent of ocean ventilation. This model
 \, previously employed to analyse the ocean’s carbon and thermal respons
 e to anthropogenic emissions\, is now adapted to explore the effects of ch
 anging overturning on the biological carbon pump. A simple nutrient-phytop
 lankton-zooplankton-detritus (NPZD) biological model is introduced to simu
 late the role of macronutrient concentrations on phytoplankton and zooplan
 kton growth. Simulations are conducted under scenarios of both constant an
 d changing circulation to investigate the impacts of slower circulation on
  the biological carbon pump and its contribution to oceanic carbon storage
 .
LOCATION:BAS Seminar Room 2
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