Solar forcing as an important trigger for West Greenland sea-ice variability over the last millennium


Contact
Xu.Zhang [ at ] awi.de

Abstract

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.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
ISI/Scopus peer-reviewed
Publication Status
Published
Eprint ID
42670
DOI 10.1016/j.quascirev.2015.11.002

Cite as
Sha, L. , JIang, H. , Seidenkrantz, M. S. , Muscheler, R. , Zhang, X. , Knudsen, M. F. , Olsen, J. , Knudsen, K. L. and Zhang, W. (2016): Solar forcing as an important trigger for West Greenland sea-ice variability over the last millennium , Quaternary Science Reviews, 131 , pp. 148-156 . doi: 10.1016/j.quascirev.2015.11.002


Download
[img]
Preview
PDF
Sha2016QSR.pdf

Download (1MB) | Preview
Cite this document as:

Share


Citation

Research Platforms
N/A

Campaigns


Actions
Edit Item Edit Item