Centennial-scale solar forcing of the South American Monsoon System recorded in stalagmites.

ABSTRACT: The South American Monsoon System (SAMS) is generally considered to be highly sensitive to Northern Hemisphere (NH) temperature variations on multi-centennial timescales. The direct influence of solar forcing on moisture convergence in global monsoon systems on the other hand, while well explored in modeling studies, has hitherto not been documented in proxy data from the SAMS region. Hence little is known about the sensitivity of the SAMS to solar forcing over the past millennium and how it might compete or constructively interfere with NH temperature variations that occurred primarily in response to volcanic forcing. Here we present a new annually-resolved oxygen isotope record from a 1500-year long stalagmite recording past changes in precipitation in the hitherto unsampled core region

SUBMITTER: Novello VF 

PROVIDER: S-EPMC4838851 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature