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

作者：Marchitto Thomas M^*; Muscheler Raimund; Ortiz Joseph D; Carriquiry Jose D; van Geen Alexander

来源：Science, 2010, 330(6009): 1378-1381.

DOI：10.1126/science.1194887

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.

• 出版日期2010-12-3