Northwest South American Climate: A story recorded in late Pleistocene deep-sea sediments of the Carnegie Ridge
Dissertationskolloquium
Veranstalter: Daniel Rincón-Martínez
Ort: GEO-Gebäude, Raum 1550 (Hörsaal)Beginn: 14.11.2013 14:00 Uhr
Daniel Rincón-Martínez of the Alfred-Wegener Institute for Polar and Marine Research, Germany, and colleagues used a suite of proxies to reconstruct ocean surface conditions in the equatorial eastern Pacific Ocean. They find the lowest amounts of terrestrial run-off during glacial periods, along with strong latitudinal and meridional sea-surface temperature gradients in the Pacific. The team attributes this to more La Niña-like conditions, coupled with a northward shift of the intertropical zone during glacial periods.
Globally, however, the intertropical zone is thought to shift southward during glacials. The contrasting movement in the equatorial eastern Pacific may be driven by strong glacial cooling in the southeast Pacific, which would locally push the intertropical convergence zone northward.
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