Data/hora: 07/06/2024 08:26:46

Provedor de dados: | 5
País: | France
Título: | Hindcasting the continuum of Dansgaard-Oeschger variability: mechanisms, patterns and timing
Autores: | Menviel, L.; Timmermann, A.; Friedrich, T.; England, M. H.
Data: | 2014
Ano: | 2014
Resumo: | 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.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00274/38487/36951.pdf

https://archimer.ifremer.fr/doc/00274/38487/81207.pdf

DOI:10.5194/cp-10-63-2014

https://archimer.ifremer.fr/doc/00274/38487/

Editor: | Copernicus Gesellschaft Mbh
Formato: | application/pdf
Fonte: | Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2014 , Vol. 10 , N. 1 , P. 63-77

Fonte:

Author(s) 2014. This work is distributed under the Creative Commons Attribution 3.0 License.

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