Title | Coupling of the Intertropical Convergence Zone and Southern Hemisphere mid-latitude climate during the early to mid-Holocene |
Publication Type | Journal Article |
Year of Publication | 2017 |
Authors | Mariani M, Fletcher M-S, Drysdale RN, Saunders KM, Heijnis H, Jacobsen G, Zawadzki A |
Journal | Geology |
Volume | 45 |
Issue | 12 |
Pagination | 1083 - 1086 |
Date Published | Jan-12-2017 |
ISSN | 0091-7613 |
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. |
URL | https://pubs.geoscienceworld.org/geology/article-lookup?doi=10.1130/G39705.1 |
DOI | 10.1130/G39705.110.1130/2017385 |