North Atlantic conditions during MIS2

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Abstract
Climatic conditions during MIS2 as simulated in a transient experiment performed with LOVECLIM (Goosse et al., 2010). The results presented here are published in Rutledal et al., 2022 and show surface climatic conditions during MIS2, particularly at 26.7 ka with a relatively weak but active AMOC (13.7 Sv).
Persistent link to this record
http://hdl.handle.net/1959.4/100257
DOI
https://doi.org/10.26190/unsworks/23964
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Corporate/Industry Contributor(s)
Publication Year
2022-04-27
Resource Type
Dataset
Keyword(s)
Last Glacial Maximum
Climate
Oceanic circulation
Sea-ice
UNSW Faculty
Files
download SST-267-265k.nc 94.93 MB The Network Common Data Form
download MLD-267-265k.nc 94.93 MB The Network Common Data Form
download ALBQ-267-265k.nc 94.93 MB The Network Common Data Form
download HFXO-267-265k.nc 7.91 MB The Network Common Data Form
download Ucurrent-267-265k.nc 79.1 MB The Network Common Data Form
Related dataset(s)
Related publication(s)
Hindcasting the continuum of Dansgaard-Oeschger variability: mechanisms, patterns and timing
(2014) Menviel, Laurie; Timmermann, A; Friedrich, T; England, Matthew
Journal Article
Millennial-scale variability associated with Dansgaard-Oeschger events is arguably one of the most puzzling climate phenomena ever discovered in paleoclimate archives. Here, we set out to elucidate the underlying dynamics by conducting a transient global hindcast simulation with a 3-D intermediate complexity earth system model covering the period 50 to 30 ka BP. The model is forced by time-varying external boundary conditions (greenhouse gases, orbital forcing, and ice-sheet orography and albedo) and anomalous North Atlantic freshwater fluxes, which mimic the effects of changing northern hemispheric ice volume on millennial timescales. Together these forcings generate a realistic global climate trajectory, as demonstrated by an extensive model/paleo data comparison. Our results are consistent with the idea that variations in ice-sheet calving and subsequent changes of the Atlantic Meridional Overturning Circulation were the main drivers for the continuum of glacial millennial-scale variability seen in paleorecords across the globe.
Rutledal et al. Atlantic inflow into the Nordic Seas at the onset of the Last Glacial Maximum promotes open-ocean conditions and Fennoscandian Ice Sheet growth, 2022 (In Review)
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