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SUMMARY:Boundary layers and Biominerals - Oscar Branson (University of Cam
 bridge)
DTSTART:20220203T113000Z
DTEND:20220203T123000Z
UID:TALK167951@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:If you have a question about this talk\, please contact Cather
 ine Pearson.\n\nTo book an in-person seat at the seminar this Thursday ple
 ase use the link below – please note that once the number is reached you
  will not be able to register but will be able to watch via the Zoom link 
 at the bottom of this email. There will also be a selection of individuall
 y wrapped sandwich lunches for everyone who is attending in-person.\n\nhtt
 ps://forms.gle/upii65uiuU6qC9P99\n\nFace coverings are expected to be worn
  on arrival at the BPI Institute AND during the seminar and in all communa
 l areas. Face coverings should only be removed once you have collected lun
 ch and are back at your seat. Please also note that for ventilation window
 s in the Open Plan Area must remain open at all times.\n\n*Boundary layers
  and Biominerals\n\nCarbonate minerals formed by marine organisms play a c
 entral role in the global carbon cycle and record an invaluable archive of
  ancient climate in their trace element and isotopic composition. These sh
 ells are formed from dissolved chemicals in seawater via a set of biologic
 al processes collectively known as 'biomineralisation mechanisms'. There a
 re considerable uncertainties surrounding the precise nature of these mech
 anisms\, which have two main consequences: (1) it is difficult to predict 
 the response of calcifying organisms to future climate change and ocean ac
 idification\, which is a source of uncertainty in future climate predictio
 ns\, and\; (2) biomineralisation modulates trace element and isotope incor
 poration into the mineral phase\, and introduces substantial uncertainties
  into the climate archives derived from them. \n\nMost studies of biominer
 alisation consider the biological and mineralogical processes that transfe
 r ions from seawater to the site of mineral growth\, and reduce the proble
 m to consider idealised organism growing in seawater with an average 'bulk
 ' composition. This neglects the modification of the surrounding environme
 nt by the act of biomineralisation. Growing calcium carbonate from seawate
 r creates distinct boundary layers around calcifying organisms\, distancin
 g the environment of calcification from bulk seawater chemistry. The dynam
 ics of this environment\, and how it will change in response to changes in
  the bulk physical and chemical environment is a major area of uncertainty
  in our understanding of biomineralisation in future oceans\, and in the r
 ecording of climate archives.\n\nIn this talk\, I will introduce the physi
 cal and chemical context of the problem\, and highlight a few case studies
  where a mechanical understanding of the system could considerably advance
  the field.*\n\nTopic: BPi Seminar\nTime: Feb 3\, 2022 11:00 AM London\n  
      \nJoin Zoom Meeting\nhttps://zoom.us/j/95574059849?pwd=V3ZLRHFOSHNNR3
 ZhZHFQTXBJZmdTUT09\n\nMeeting ID: 955 7405 9849\nPasscode: 623559\n\nTo at
 tend the meeting\, just open the meeting link in e.g.\, a web browser\, wh
 ich\, if you have not already installed Zoom\, will start a download and t
 he quick installation of a small client will be necessary. If you already 
 have Zoom\, you already know what to do – and the link can be entered as
  the message ID.\n\nThe link will be live from 11.15am. By default you wil
 l be muted and not emitting video\, so remember to unmute yourself before 
 asking questions.\n\n\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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