Data/hora: 13/06/2024 04:05:01

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Solar forcing as an important trigger for West Greenland sea-ice variability over the last millennium
Autores: | Sha, Longbin; Jiang, Hui; Seidenkrantz, Marit-solveig; Muscheler, Raimund; Zhang, Xu; Knudsen, Mads Faurschou; Olsen, Jesper; Knudsen, Karen Luise; Zhang, Weiguo.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Sea-ice variability; Solar activity; West Greenland; Last millennium.
Resumo: | Arctic sea ice represents an important component of the climate system, and the present reduction of sea ice in the Arctic is of major concern. Despite its importance, little is known about past changes in sea-ice cover and the underlying forcing mechanisms. Here, we use diatom assemblages from a marine sediment core collected from the West Greenland shelf to reconstruct changes in sea-ice cover over the last millennium. The proxy-based reconstruction demonstrates a generally strong link between changes in sea-ice cover and solar variability during the last millennium. Weaker (or stronger) solar forcing may result in the increase (or decrease) in sea-ice cover west of Greenland. In addition, model simulations show that variations in solar activity not only affect local sea-ice formation, but also control the sea-ice transport from the Arctic Ocean through a sea-ice-ocean-atmosphere feedback mechanism. The role of solar forcing, however, appears to have been more ambiguous during an interval around AD 1500, after the transition from the Medieval Climate Anomaly to the Little Ice Age, likely to be driven by a range of factors.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00421/53291/54134.pdf

https://archimer.ifremer.fr/doc/00421/53291/54135.pdf

DOI:10.1016/j.quascirev.2015.11.002

https://archimer.ifremer.fr/doc/00421/53291/

Editor: | Pergamon-elsevier Science Ltd
Relação: | info:eu-repo/grantAgreement/EC/FP7/243908/EU//PAST4FUTURE
Formato: | application/pdf
Fonte: | Quaternary Science Reviews (0277-3791) (Pergamon-elsevier Science Ltd), 2016-01-01 , Vol. 131 , N. Part A , P. 148-156

Fonte:

2015 Elsevier Ltd. All rights reserved

info:eu-repo/semantics/openAccess

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