Indonesian Throughflow drove Australian climate from humid Pliocene to arid Pleistocene

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doi: 10.1002/2017GL072977
Author(s): Christensen, Beth A.; Renema, Willem; Henderiks, Jorijntje; De Vleeschouwer, David; Groeneveld, Jeroen; Castañeda, Isla S.; Reuning, Lars; Bogus, Kara; Auer, Gerald; Ishiwa, Takeshige; McHugh, Cecilia M.; Gallagher, Stephen J.; Fulthorpe, Craig S.
Author Affiliation(s): Primary:
Adelphi University, Environmental Studies Program, Garden City, NY, United States
Naturalis Biodiversity Center, Netherlands
Uppsala University, Sweden
University of Bremen, Germany
University of Massachusetts at Amherst, United States
Aachen University, Germany
Texas A&M University, United States
University of Graz, Austria
University of Tokyo, Japan
Queens College, United States
University of Melbourne, Australia
University of Texas at Austin, United States
Volume Title: Geophysical Research Letters
Source: Geophysical Research Letters, 44(13), p.6914-6925. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0094-8276 CODEN: GPRLAJ
Note: In English. 23 refs.; illus., incl. sketch maps
Summary: Late Miocene to mid-Pleistocene sedimentary proxy records reveal that northwest Australia underwent an abrupt transition from dry to humid climate conditions at 5.5 million years (Ma), likely receiving year-round rainfall, but after ∼3.3 Ma, climate shifted toward an increasingly seasonal precipitation regime. The progressive constriction of the Indonesian Throughflow likely decreased continental humidity and transferred control of northwest Australian climate from the Pacific to the Indian Ocean, leading to drier conditions punctuated by monsoonal precipitation. The northwest dust pathway and fully established seasonal and orbitally controlled precipitation were in place by ∼2.4 Ma, well after the intensification of Northern Hemisphere glaciation. The transition from humid to arid conditions was driven by changes in Pacific and Indian Ocean circulation and regional atmospheric moisture transport, influenced by the emerging Maritime Continent. We conclude that the Maritime Continent is the switchboard modulating teleconnections between tropical and high-latitude climate systems. Abstract Copyright (2017), . The Authors.
Year of Publication: 2017
Research Program: IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Asia; Australasia; Australia; Cenozoic; Expedition 356; Far East; Humid environment; Humidity; IODP Site U1463; Indian Ocean; Indonesia; Indonesian Throughflow; International Ocean Discovery Program; Miocene; Monsoons; Neogene; Ocean circulation; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Pleistocene; Pliocene; Quaternary; Terrestrial environment; Tertiary
Record ID: 2018051583
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom

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