| Registro completo |
| Provedor de dados: |
ArchiMer
|
| País: |
France
|
| Título: |
Exploring the oxygen isotope fingerprint of Dansgaard-Oeschger variability and Heinrich events
|
| Autores: |
Bagniewski, Witold
Meissner, Katrin J.
Menviel, Laurie
|
| Data: |
2017-03
|
| Ano: |
2017
|
| Palavras-chave: |
MIS3
Model-data comparison
Heinrich events
Dansgaard-Oeschger cycles
Delta O-18
AMOC
|
| Resumo: |
We present the first transient simulations of Marine Isotope Stage 3 (MIS 3) performed with an oxygen isotope-enabled climate model. Our simulations span several Dansgaard-Oeschger cycles and three Heinrich stadials and are directly compared with oxygen isotope records from 13 sediment and 2 ice cores. Our results are consistent with a 30-50% weakening of the Atlantic Meridional Overturning Circulation during Dansgaard-Oeschger stadials and a complete shutdown during Heinrich stadials. We find that the simulated delta O-18 anomalies differ significantly between Heinrich stadials and non-Heinrich stadials. This difference is mainly due to different responses in ocean circulation, and therefore climate, impacting oceanic delta O-18, while the volume of O-18-depleted meltwater plays a secondary role.
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
https://archimer.ifremer.fr/doc/00420/53180/55067.pdf
https://archimer.ifremer.fr/doc/00420/53180/55081.pdf
DOI:10.1016/j.quascirev.2017.01.007
https://archimer.ifremer.fr/doc/00420/53180/
|
| Editor: |
Pergamon-elsevier Science Ltd
|
| Formato: |
application/pdf
|
| Fonte: |
Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2017-03 , Vol. 159 , P. 1-14
|
| Direitos: |
2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license
info:eu-repo/semantics/openAccess
restricted use
|
