Title: Rapid shifts in subarctic Pacific climate between 138 and 70 ka
Abstract: Research Article| October 01, 2014 Rapid shifts in subarctic Pacific climate between 138 and 70 ka Lars Max; Lars Max * 1Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Alten Hafen 26, D-27568 Bremerhaven, Germany *E-mail: [email protected]. Search for other works by this author on: GSW Google Scholar Lukas Belz; Lukas Belz 2Deutsches GeoForschungsZentrum, Helmholtz-Zentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany Search for other works by this author on: GSW Google Scholar Ralf Tiedemann; Ralf Tiedemann 1Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Alten Hafen 26, D-27568 Bremerhaven, Germany Search for other works by this author on: GSW Google Scholar Kirsten Fahl; Kirsten Fahl 1Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Am Alten Hafen 26, D-27568 Bremerhaven, Germany Search for other works by this author on: GSW Google Scholar Dirk Nürnberg; Dirk Nürnberg 3GEOMAR, Helmholtz-Zentrum für Ozeanforschung, Wischhofstrasse 1-3, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Jan-Rainer Riethdorf Jan-Rainer Riethdorf 3GEOMAR, Helmholtz-Zentrum für Ozeanforschung, Wischhofstrasse 1-3, D-24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Geology (2014) 42 (10): 899–902. https://doi.org/10.1130/G35879.1 Article history received: 16 May 2014 rev-recd: 22 Jul 2014 accepted: 22 Jul 2014 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Lars Max, Lukas Belz, Ralf Tiedemann, Kirsten Fahl, Dirk Nürnberg, Jan-Rainer Riethdorf; Rapid shifts in subarctic Pacific climate between 138 and 70 ka. Geology 2014;; 42 (10): 899–902. doi: https://doi.org/10.1130/G35879.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract During the past decades, remarkable changes in sea-surface temperature (SST) and sea-ice extent have been observed in the marginal seas of the subarctic Pacific. However, little is known about natural climate variability at millennial time scales far beyond instrumental observations. Geological proxy records, such as those derived from marine sediments, offer a unique opportunity to investigate millennial-scale natural climate variability of the Artic and subarctic environments during past glacial-interglacial cycles. Here we provide reconstructions of sea-ice variability inferred from IP25 (Ice Proxy with 25 carbon atoms) sea-ice biomarker and SST fluctuations based on alkenone unsaturation index () of the subarctic Pacific realm between 138 and 70 ka. Warmest sea-surface conditions were found during the early Eemian interglacial (128 to 126 ka), exceeding modern SSTs by ∼2 °C. The further North Pacific climate evolution is marked by pronounced oscillations in SST and sea-ice extent on millennial time scales, which correspond remarkably well to short-term temperature oscillations known from Greenland and the North Atlantic. These results imply a common forcing, which seems to be closely coupled to dynamics of the Atlantic meridional overturning circulation. However, immediate propagation of such climate fluctuations far beyond the North Atlantic basin suggests a rapid circumpolar coupling mechanism probably acting through the atmosphere, a prerequisite to explain the apparent synchronicity of remote climatic reorganizations in the subarctic Pacific. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2014
Publication Date: 2014-08-29
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 11
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