| Type |
Article |
| Date |
2014 |
| Language |
English |
| Author(s) |
Menviel L.1, Timmermann A.2, Friedrich T.2, England M. H.1 |
| Affiliation(s) |
1 : Univ New S Wales, Climate Change Res Ctr, Sydney, NSW, Australia.
2 : Univ Hawaii, Int Pacific Res Ctr, Honolulu, HI 96822 USA. |
| Source |
Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2014 , Vol. 10 , N. 1 , P. 63-77 |
| DOI |
10.5194/cp-10-63-2014 |
| WOS© Times Cited |
91 |
| Abstract |
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. |
| Full Text |
| File |
Pages |
Size |
Access |
| Publisher's official version |
15 |
3 MB |
Open access |
| Preprint |
36 |
4 MB |
Open access |
|
