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Dynamical Response of the Tropical Pacific Ocean to Solar Forcing During the Early Holocene

  • Thomas M. Marchitto
  • Raimund Muscheler
  • Joseph D. Ortiz
  • Jose D. Carriquiry
  • Alexander van Geen
Publishing year: 2010
Language: English
Pages: 1378-1381
Publication/Series: Science
Volume: 330
Issue: 6009
Document type: Journal article
Publisher: The American Association for the Advancement of Science

Abstract english

We present a high-resolution magnesium/calcium proxy record of Holocene sea surface temperature (SST) from off the west coast of Baja California Sur, Mexico, a region where interannual SST variability is dominated today by the influence of the El Nino-Southern Oscillation (ENSO). Temperatures were lowest during the early to middle Holocene, consistent with documented eastern equatorial Pacific cooling and numerical model simulations of orbital forcing into a La Nina-like state at that time. The early Holocene SSTs were also characterized by millennial-scale fluctuations that correlate with cosmogenic nuclide proxies of solar variability, with inferred solar minima corresponding to El Nino-like (warm) conditions, in apparent agreement with the theoretical "ocean dynamical thermostat" response of ENSO to exogenous radiative forcing.


  • Geology


  • ISSN: 1095-9203
Raimund Muscheler
E-mail: raimund [dot] muscheler [at] geol [dot] lu [dot] se


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