Ocean currents generate large footprints in marine palaeoclimate proxies

Erik Van Sebille, Paolo Scussolini, Jonathan V. Durgadoo, Frank J.C. Peeters, Arne Biastoch, Wilbert Weijer, Chris Turney, Claire B. Paris, Rainer Zahn

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Fossils of marine microorganisms such as planktic foraminifera are among the cornerstones of palaeoclimatological studies. It is often assumed that the proxies derived from their shells represent ocean conditions above the location where they were deposited. Planktic foraminifera, however, are carried by ocean currents and, depending on the life traits of the species, potentially incorporate distant ocean conditions. Here we use high-resolution ocean models to assess the footprint of planktic foraminifera and validate our method with proxy analyses from two locations. Results show that foraminifera, and thus recorded palaeoclimatic conditions, may originate from areas up to several thousands of kilometres away, reflecting an ocean state significantly different from the core site. In the eastern equatorial regions and the western boundary current extensions, the offset may reach 1.5 °C for species living for a month and 3.0 °C for longer-living species. Oceanic transport hence appears to be a crucial aspect in the interpretation of proxy signals.

Original languageEnglish (US)
Article number6521
JournalNature communications
Volume6
DOIs
StatePublished - Mar 4 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Ocean currents generate large footprints in marine palaeoclimate proxies'. Together they form a unique fingerprint.

  • Cite this

    Van Sebille, E., Scussolini, P., Durgadoo, J. V., Peeters, F. J. C., Biastoch, A., Weijer, W., Turney, C., Paris, C. B., & Zahn, R. (2015). Ocean currents generate large footprints in marine palaeoclimate proxies. Nature communications, 6, [6521]. https://doi.org/10.1038/ncomms7521