Coupling of equatorial Atlantic surface stratification to glacial shifts in the tropical rainbelt.

ABSTRACT: The modern state of the Atlantic meridional overturning circulation promotes a northerly maximum of tropical rainfall associated with the Intertropical Convergence Zone (ITCZ). For continental regions, abrupt millennial-scale meridional shifts of this rainbelt are well documented, but the behavior of its oceanic counterpart is unclear due the lack of a robust proxy and high temporal resolution records. Here we show that the Atlantic ITCZ leaves a distinct signature in planktonic foraminifera assemblages. We applied this proxy to investigate the history of the Atlantic ITCZ for the last 30,000 years based on two high temporal resolution records from the western Atlantic Ocean. Our reconstruction indicates that the shallowest mixed layer associated with the Atlantic ITCZ unambiguously shifte

SUBMITTER: Portilho-Ramos RC 

PROVIDER: S-EPMC5431516 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature