globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2016.05.004
Scopus记录号: 2-s2.0-84971451148
论文题名:
Evidence for extreme floods in arid subtropical northwest Australia during the Little Ice Age chronozone (CE 1400-1850)
作者: Rouillard A.; Skrzypek G.; Turney C.; Dogramaci S.; Hua Q.; Zawadzki A.; Reeves J.; Greenwood P.; O'Donnell A.J.; Grierson P.F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 144
起始页码: 107
结束页码: 122
语种: 英语
英文关键词: Hydroclimate ; Intertropical Convergence Zone (ITCZ) ; Late Holocene ; Little Ice Age (LIA) ; Paleolimnology ; Pilbara ; Sediment
Scopus关键词: Arid regions ; Floods ; Glacial geology ; Paleolimnology ; Rain ; Sediments ; Storms ; Tropics ; Wetlands ; Hydroclimate ; Intertropical convergence zone ; Late Holocene ; Little Ice Age ; Pilbara ; Ice ; arid environment ; extreme event ; flood ; hydrometeorology ; intertropical convergence zone ; Little Ice Age ; paleoclimate ; paleolimnology ; proxy climate record ; sedimentary sequence ; subtropical region ; tropical cyclone ; Australia ; Indian Ocean ; Indian Ocean (Tropical) ; Pacific Ocean ; Pilbara ; Western Australia
英文摘要: Here we report a ~2000-year sediment sequence from the Fortescue Marsh (Martuyitha) in the eastern Pilbara region, which we have used to investigate changing hydroclimatic conditions in the arid subtropics of northwest Australia. The Pilbara is located at the intersection of the tropical Indian and Pacific Oceans and its modern rainfall regime is strongly influenced by tropical cyclones, the Intertropical Convergence Zone (ITCZ) and the Indo-Pacific Warm Pool. We identified four distinct periods within the record. The most recent period (P1: CE ~1990-present) reveals hydroclimatic conditions over recent decades that are the most persistently wet of potentially the last ~2000 years. During the previous centuries (P2: ~CE 1600-1990), the Fortescue Marsh was overall drier but likely punctuated by a number of extreme floods, which are defined here as extraordinary, strongly episodic floods in drylands generated by rainfall events of high volume and intensity. The occurrence of extreme floods during this period, which encompasses the Little Ice Age (LIA; CE 1400-1850), is coherent with other southern tropical datasets along the ITCZ over the last 2000 years, suggesting synchronous hydroclimatic changes across the region. This extreme flood period was preceded by several hundred years (P3: ~CE 700-1600) of less vigorous but more regular flows. The earliest period of the sediment record (P4: ~CE 100-700) was the most arid, with sedimentary and preservation processes driven by prolonged drought. Our results highlight the importance of developing paleoclimate records from the tropical and sub-tropical arid zone, providing a long-term baseline of hydrological conditions in areas with limited historical observations. © 2016 Elsevier Ltd.
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被引频次[WOS]:25   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59565
Appears in Collections:过去全球变化的重建

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作者单位: Ecosystems Research Group and West Australian Biogeochemistry Centre, School of Plant Biology, The University of Western Australia, Crawley, WA, Australia; Climate Change Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia; Rio Tinto Iron Ore, Perth, WA, Australia; Australian Nuclear Science and Technology Organisation (ANSTO), Locked Bag 2001, Kirrawee DC, NSW, Australia; Faculty of Science and Technology, Federation University Australia, PO Box 663, Ballarat, VIC, Australia; Centre for Exploration Targeting, School of Earth and Environment, The University of Western Australia, Crawley, WA, Australia; Western Australia Organic and Isotope Geochemistry Centre, The Institute for Geoscience Research, Department of Chemistry, Curtin University, Bentley, WA, Australia

Recommended Citation:
Rouillard A.,Skrzypek G.,Turney C.,et al. Evidence for extreme floods in arid subtropical northwest Australia during the Little Ice Age chronozone (CE 1400-1850)[J]. Quaternary Science Reviews,2016-01-01,144
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