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SUMMARY:Fingerprints of past carbon cycle-climate changes in the Bern3D mo
 del - Fortunat Joos\, Climate and Environmental Physics\, Physics Institut
 e and Oeschger Centre for Climate Change Research\, University of Bern
DTSTART:20121106T163000Z
DTEND:20121106T173000Z
UID:TALK38986@talks.cam.ac.uk
CONTACT:John Maclennan
DESCRIPTION:Proxy information from ice cores\, marine sediment\, and other
  archives demonstrate a fascinating spatio-temporal evolution of the coupl
 ed climate and biogeochemical system on orbital-to-decadal time scale. How
 ever\, we are still far from a complete understanding of the drivers\, mec
 hanisms and feedbacks governing past changes in the Earth System. In the p
 resentation\, results from transient simulations over glacial-interglacial
  periods with the Bern3D climate-carbon cycle model will be discussed. A f
 ocus is on mechanisms governing past variations in atmospheric CO2 and the
  associated spatial and temporal imprints on carbon isotopes\, deep ocean 
 carbonate ion concentrations\, and the export of biogenic particles. Resul
 ts are compared to proxies from marine and ice archives. Another focus is 
 how the distribution of neodymium isotopes in the ocean can be applied to 
 constrain past ocean circulation and water mass distribution. \n\nSelected
  publications (pdfs at http://www.climate.unibe.ch/~joos/publications.html
 )\n\nGlacial-interglacial CO2/carbonate/13C/14C\n\nMenviel\, L.\, F. Joos\
 , "Towards explaining the Holocene carbon dioxide and carbon isotope recor
 ds: Results from transient ocean carbon cycle-climate simulations"\, Paleo
 ceanography\, 24/PA1207\, 2012\n\nMenviel\, L.\, F. Joos\, S. P. Ritz\, "A
 tmospheric CO2\, C13 and the marine carbon cycle during the last glacial-i
 nterglacial cycle: results from transient simulations with the Bern3D mode
 l"\, Quaternary Science Reviews\, submitted\, 2012\n\nRoth\, R.\, F. Joos\
 , "Model limits on the role of volcanic carbon emissions in regulating gla
 cial-interglacial CO2 variations"\, Earth and Planetary Science Letters\, 
 329-330\, 141-149\,2012\n\nTschumi\, T.\, F. Joos\, M. Gehlen\, C. Heinze\
 , "Deep ocean ventilation\, carbon isotopes\, marine sedimentation and the
  deglacial CO2 rise"\, Climate of the Past\, 7\, 771-800\,2011\n\nNeodymiu
 m isotopes\n\nRempfer\, J.\, T. F. Stocker\, F. Joos\, J.-C. Dutay\, "On t
 he relationship between Nd isotopic composition and ocean overturning circ
 ulation in idealised freshwater discharge events"\, Paleoceanography\, sub
 mitted\, 2012\n\nRempfer\, J.\, T. F. Stocker\, F. Joos\, J.-C. Dutay\, "S
 ensitivity of Nd isotopic composition in seawater to changes in Nd sources
  and paleoceanographic implications "\, Journal of Geophysical Research\, 
 submitted\, 2012\n\nRempfer\, J.\, T. F. Stocker\, F. Joos\, J.-C. Dutay\,
  M. Siddall\, "Modelling Nd-isotopes with a coarse resolution ocean circul
 ation model: Sensitivities to model parameters and source/sink distributio
 ns"\, Geochimica et Cosmochimica Acta\, 75\, 5927-5950\, 2011
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
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