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Completed
The bi-polar seesaw and CO2: Is there anything special about 'Terminal seesaw events'?
FunderUK Research and Innovation
Funder Contribution £250,590.00
Duration01 Nov 2012 - 31 Oct 2015
Funded underNERC
Project codeNE/J010545/1
Identifiers
Project timeline100%
Description
A new paradigm has emerged in recent years for explaining late Pleistocene glacial-interglacial climate transitions. According to this paradigm, a clear distinction between mechanisms that operate on 'orbital' and on 'millennial' timescales is no longer made. The slow orbital (insolation) pacing of the ice-ages would thus engender strong positive feedbacks, which could themselves emerge on much shorter timescales. Glacial-interglacial fluctuations in atmospheric CO2 are emblematic of this notion; they clearly make an important contribution to glacial-interglacial radiative forcing, but they appear to accrue through rapid changes that are somehow linked with asymmetric inter-hemispheric climate anomalies (the 'bipolar seessaw'). However, not all rapid changes in atmospheric CO2 are associated with glacial-interglacial transitions. This raises the important question of what has controlled millennial CO2 changes in the past, and what (if anything) is special about deglacial versus mid-glacial CO2 pulses. Current data does not allow us to address these questions adequately. What is needed is a new set of high-resolution reconstructions of Southern Ocean up-welling and deep-water ventilation, which can be linked to the ice-core chronology and thus compared with similarly detailed records of abrupt North Atlantic climate variability. This project sets out to provide these reconstructions, and on thus place our understanding of past millennial CO2 variability on a more robust observational footing than has hitherto been possible.
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A new paradigm has emerged in recent years for explaining late Pleistocene glacial-interglacial climate transitions. According to this paradigm, a clear distinction between mechanisms that operate on 'orbital' and on 'millennial' timescales is no longer made. The slow orbital (insolation) pacing of the ice-ages would thus engender strong positive feedbacks, which could themselves emerge on much shorter timescales. Glacial-interglacial fluctuations in atmospheric CO2 are emblematic of this notion; they clearly make an important contribution to glacial-interglacial radiative forcing, but they appear to accrue through rapid changes that are somehow linked with asymmetric inter-hemispheric climate anomalies (the 'bipolar seessaw'). However, not all rapid changes in atmospheric CO2 are associated with glacial-interglacial transitions. This raises the important question of what has controlled millennial CO2 changes in the past, and what (if anything) is special about deglacial versus mid-glacial CO2 pulses. Current data does not allow us to address these questions adequately. What is needed is a new set of high-resolution reconstructions of Southern Ocean up-welling and deep-water ventilation, which can be linked to the ice-core chronology and thus compared with similarly detailed records of abrupt North Atlantic climate variability. This project sets out to provide these reconstructions, and on thus place our understanding of past millennial CO2 variability on a more robust observational footing than has hitherto been possible.
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Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. Provider Academic Bibliometrics & Assessment Computational Utility Service Expiration Session Name greekSession Description Stores the user session ID for Academic Bibliometrics & Assessment Computational Utility Service. 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