Little is known about the presence of high-latitude sea ice before 2.6 million years ago. A reanalysis of marine sediments from the Arctic Ocean indicates an intermittent presence of perennial sea ice as early as 44 million years ago.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 12 print issues and online access
$259.00 per year
only $21.58 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
© IMAGE ASSET MANAGEMENT LTD. /ALAMY
References
St. John, K. Paleoceanography 23, PA1S05 (2008).
Stickley, C. E. et al. Nature 460, 376–380, (2009).
Darby, D. Nature Geosci. 7, 210–213 (2014).
Zachos, J. C., Dickens, G. R. & Zeebe, R. E. Nature 451, 279–283 (2008).
Sexton, P. et al. Nature 471, 349–352 (2011).
Darby, D. A. Paleoceanography 23, PA1S07 (2008).
Krylov, A. A. et al. Paleoceanography 23, PA1S06 (2008).
Sluijs, A. et al. Nature Geosci. 6, 429–434 (2013).
Backman, J. et al. Paleoceanography 23, PA1S07 (2008).
Poirier, A. & Hillaire-Marcel, C. Geophy. Res. Lett. 38, L14607 (2011).
DeConto, R. et al. Nature 455, 652–656 (2008).
DeConto, R., Pollard, D. & Harwood, D. Paleoceanography 22, PA3214 (2007).
Houben, A. J. P. et al. Science 340, 341–344 (2013).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Stickley, C. The sea ice thickens. Nature Geosci 7, 165–166 (2014). https://doi.org/10.1038/ngeo2080
Published:
Issue Date:
DOI: https://doi.org/10.1038/ngeo2080
