Menviel, L. et al. (2011): Deconstructing the last glacial termination; the role of millennial and orbital-scale forcings

Leg/Site/Hole:
ODP 146
ODP 161
ODP 165
ODP 202
ODP 165 1002
ODP 202 1233
ODP 146 893
ODP 161 977
Identifier:
2013-034521
georefid

10.1016/j.quascirev.2011.02.005
doi

Creator:
Menviel, L.
University of Bern, Physics Institute, Bern, Switzerland
author

Timmermann, A.
University of Hawai'i, United States
author

Timm, O. Elison
Universite de Liege, Belgium
author

Mouchet, A.
author

Identification:
Deconstructing the last glacial termination; the role of millennial and orbital-scale forcings
2011
Quaternary Science Reviews
Elsevier, International
30
9-10
1155-1172
Using an Earth system model of intermediate complexity forced by continuously varying boundary conditions and a hypothetical profile of freshwater forcing, the model simulates Heinrich event 1 (H1), the Bolling warm period, the Older Dryas, the Antarctic Cold Reversal (ACR) and the Younger Dryas in close agreement with paleo-proxy data from different regions worldwide. The ACR can be simulated as the bipolar seesaw response to the AMOC recovery during the termination of H1. However, this study also demonstrates that the amplitude of the ACR can be further amplified by a rapid deglacial retreat of the Antarctic Ice sheets. We suggest that melting from both, the Laurentide and the Antarctic Ice sheets contributed to the sea level rise associated with Meltwater Pulse 1-A (MWP-1A). It is hypothesized that the northern hemispheric source of MWP-1A caused the Older Dryas cooling in the Northern Hemisphere, whereas the Southern Hemispheric source contributed to the ACR. The study also documents that for the majority of paleo-climate proxies considered here, the relative timing can be qualitatively reproduced by the transient modeling experiments. The climate model solution presented here may provide a means to further constrain dating uncertainties of some of paleo-climate proxies during the Last Glacial Termination.
English
Serial
Coverage:Geographic coordinates:
North:36.0154
West:-120.0212East: -1.5719
South:-41.0000

Quaternary geology; Alboran Sea; Antarctic ice sheet; Antarctica; Atlantic Ocean; Bolling; Cariaco Basin; Caribbean Sea; Cenozoic; climate forcing; deglaciation; East Pacific; Heinrich events; Laurentide ice sheet; Leg 146; Leg 161; Leg 165; Leg 202; LOVECLIM; Mediterranean Sea; North Atlantic; North Pacific; Northeast Pacific; numerical models; Ocean Drilling Program; ODP Site 1002; ODP Site 1233; ODP Site 893; ODP Site 977; Older Dryas; orbital forcing; Pacific Ocean; paleo-oceanography; paleoclimatology; Pleistocene; Quaternary; Santa Barbara Basin; sea-level changes; South Pacific; Southeast Pacific; upper Pleistocene; upper Weichselian; Weichselian; West Mediterranean; Younger Dryas;

.