Response of the Southern Ocean to millennial-scale climate change during marine isotope stage three ...
Ice core records show that Antarctica rapidly warmed and cooled on centennial to millennial-timescales during marine isotope stage 3 (MIS-3). These warming events are called Antarctic Isotope Maxima (AIM) and are linked to opposing counterparts in the Northern hemisphere ‚ÄövÑvÆ called Dansgaard-Oes...
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| Format: | Thesis |
| Language: | unknown |
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University Of Tasmania
2023
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| Online Access: | https://dx.doi.org/10.25959/23246558 https://figshare.utas.edu.au/articles/thesis/Response_of_the_Southern_Ocean_to_millennial-scale_climate_change_during_marine_isotope_stage_three/23246558 |
| Summary: | Ice core records show that Antarctica rapidly warmed and cooled on centennial to millennial-timescales during marine isotope stage 3 (MIS-3). These warming events are called Antarctic Isotope Maxima (AIM) and are linked to opposing counterparts in the Northern hemisphere ‚ÄövÑvÆ called Dansgaard-Oeschger (D-O) events ‚ÄövÑvÆ through slowdowns of the Atlantic meridional overturning circulation (AMOC). Southern Hemisphere warming during AIM warming events is associated with increasing atmospheric CO2, which the Southern Ocean is thought to play a significant role in modulating. This thesis explores the role of Southern Ocean processes that affect the carbon cycle and climate change during MIS-3 by compiling high-resolution MIS-3 sea surface temperature records, developing a new record of biological and physical changes in the Subantarctic southwest Pacific sector of the Southern Ocean, and using these data to validate a coupled ocean-atmosphere and general circulation modelling. In Chapter two of this thesis, ... |
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