Evaluating the Radiocarbon Reservoir Effect in Lake Kutubu, Papua New GuineaABSTRACT

TitleEvaluating the Radiocarbon Reservoir Effect in Lake Kutubu, Papua New GuineaABSTRACT
Publication TypeJournal Article
Year of Publication2019
AuthorsSchneider, L, Pain, CF, Haberle, S, Blong, R, Alloway, BV, Fallon, SJ, Hope, G, Zawadzki, A, Heijnis, H
JournalRadiocarbon
Volume61
Issue1
Pagination287 - 308
Date PublishedJan-02-2019
ISSN0033-8222
Abstract

Conceptual models predict a tight coupling between the Intertropical Convergence Zone (ITCZ) and the Southern Westerly Winds (SWW) in response to glacial-interglacial transitions, yet little is known about this relationship under Holocene boundary conditions. Here we present a synthesis of Holocene pollen data from the southwest Pacific mid-latitudes that tracks changes in the SWW. Comparison of our SWW paleoclimate records with data tracking the ITCZ, oceanic circulation, and insolation reveals clearly synchronous and in-phase ITCZ-SWW dynamics between 12 and 5 ka, indicating a tight coupling between the tropics and southern mid-latitudes in response to ocean circulation and insolation. An apparent decoupling of the SWW and ITCZ in the Pacific region after 5 ka is attributable to the overriding influence of the El Niño–Southern Oscillation (ENSO) over the proxy data.

URLhttps://www.cambridge.org/core/product/identifier/S0033822218000498/type/journal_article
DOI10.1017/RDC.2018.49