Skip to main content

Research Repository

Advanced Search

Coupling of the Intertropical Convergence Zone and Southern Hemisphere mid-latitude climate during the early to mid-Holocene

Mariani, Michela; Fletcher, Michael-Shawn; Drysdale, Russell N.; Saunders, Krystyna M.; Heijnis, Henk; Jacobsen, Geraldine; Zawadzki, Atun

Authors

Michael-Shawn Fletcher

Russell N. Drysdale

Krystyna M. Saunders

Henk Heijnis

Geraldine Jacobsen

Atun Zawadzki



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.

Citation

Mariani, M., Fletcher, M., Drysdale, R. N., Saunders, K. M., Heijnis, H., Jacobsen, G., & Zawadzki, A. (2017). Coupling of the Intertropical Convergence Zone and Southern Hemisphere mid-latitude climate during the early to mid-Holocene. Geology, 45(12), 1083-1086. https://doi.org/10.1130/G39705.1

Journal Article Type Article
Acceptance Date Sep 14, 2017
Online Publication Date Oct 27, 2017
Publication Date Dec 20, 2017
Deposit Date Feb 20, 2019
Publicly Available Date Mar 28, 2024
Journal Geology
Print ISSN 0091-7613
Electronic ISSN 1943-2682
Publisher Geological Society of America
Peer Reviewed Peer Reviewed
Volume 45
Issue 12
Pages 1083-1086
DOI https://doi.org/10.1130/G39705.1
Public URL https://nottingham-repository.worktribe.com/output/1573965
Publisher URL https://pubs.geoscienceworld.org/gsa/geology/article/45/12/1083/519762/coupling-of-the-intertropical-convergence-zone-and