Late Quaternary Milankovitch-scale climatic change and variability and its impact on monsoonal Australasia

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doi: 10.1016/S0025-3227(03)00210-X
Author(s): Kershaw, A. P.; van der Kaars, S.; Moss, P. T.
Author Affiliation(s): Primary:
Monash University, School of Geography and Environmental Science, Monash, Victoria, Australia
Tongji University, China
University of Iowa, United States
Volume Title: Asian monsoons and global linkages on Milankovitch and sub-Milankovitch time scales
Volume Author(s): Clemens, Steven C., editor; Wang Pixian; Prell, Warren L.
Source: Marine Geology, 201(1-3), p.81-95; Asian monsoons and global linkages on Milankovitch and sub-Milankovitch time scales, Beijing, China, May 9-11, 2001, edited by Steven C. Clemens, Wang Pixian and Warren L. Prell. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0025-3227 CODEN: MAGEA6
Note: In English. 41 refs.; illus., incl. 2 tables, sketch map
Summary: Four pollen and charcoal records derived from marine cores around the northern perimeter of Australia are examined to provide a regional picture of patterns, causes and impacts of climate change over the last 100-300 ka. The availability of radiocarbon dates and oxygen isotope records for the cores provides primary chronological control. Spectral analysis of components of these records demonstrates an overall importance of Milankovitch frequencies with clear glacial-interglacial cyclicity dominated by variation in precipitation. In addition, a number of pollen taxa, as well as charcoal particles, exhibit a 30 ka frequency that is considered, from its relationship with biomass burning and with results of past modelling, to reflect changes in the intensity of El Nino-Southern Oscillation (ENSO) variability. Pollen components of all records show a decline, frequently stepwise, in more fire-sensitive vegetation and its replacement with more fire-tolerant vegetation. There is some evidence that this trend is linked to an onset or general increase in ENSO activity and perhaps also to variation in monsoon activity dating from about 300 ka BP that was caused by changes to oceanic circulation within the Indonesian region. The trend may have accelerated within the last 45 ka due to burning by indigenous people. Abstract Copyright (2003) Elsevier, B.V.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Absolute age; Australasia; Banda Sea; Biomass; C-14; Carbon; Cenozoic; Charcoal; Climate change; Climate forcing; Coral Sea; Cores; Correlation; Dates; El Nino Southern Oscillation; Indian Ocean; Indonesian Seas; Isotopes; Leg 133; Lombok Ridge; Microfossils; Milankovitch theory; Miospores; Monsoons; ODP Site 820; Ocean Drilling Program; Orbital forcing; Pacific Ocean; Paleoclimatology; Palynomorphs; Pollen; Quaternary; Radioactive isotopes; South Pacific; Southwest Pacific; Upper Quaternary; Variations; West Pacific
Coordinates: S163814 S163813 E1461814 E1461813
S220242 S220242 E1133006 E1133006
S104700 S104700 E1180400 E1180400
Record ID: 2003074930
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands