气候变化领域集成服务门户(CCPortal): Fluvial Response to Environmental Change in Sub-Tropical Australia over the Past 220 Ka

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DOI	10.3390/quat7010009
	Fluvial Response to Environmental Change in Sub-Tropical Australia over the Past 220 Ka
	Croke, Jacky; Thompson, Chris; Larsen, Annegret; Macklin, Mark; Hughes, Kate
发表日期	2024
ISSN	2571-550X
起始页码	7
结束页码	1
卷号	7 期号:1
英文摘要	This paper uses a 30 m record of valley alluviation in the Lockyer Creek, a major tributary of the mid-Brisbane River in Southeast Queensland, to document the timing and nature of Quaternary fluvial response. A combination of radiocarbon and optically stimulated luminescence dating reveals a sequence of major cut and fill episodes. The earliest aggradation phase is represented by a basal gravel unit, dating to similar to 220 ka (marine isotope sub-stage 7d), and although little evidence supports higher fluvial discharges during MIS 5, a MIS 3 fluvial episode characterised by incision and aggradation dates to similar to 60 ka. A penultimate phase of incision to a depth of 30 m prior to similar to 14 ka saw the lower Lockyer occupy its current position within the valley floor. The Lockyer Creek shows evidence of only minor fluvial activity during MIS 2, suggesting a drier LGM climate. The appearance of alternating fine- and coarse-grained units at about 2 ka is notable and may represent higher-energy flood conditions associated with a strengthening of El Nino Southern Oscillation activity as observed in the flood of 2011. The aggradation rate for this Holocene floodplain unit is similar to 11 times higher than the long-term rate.
英文关键词	valley fill; luminescence dating; avulsion; Southeast Queensland; base level; climate change; flood
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001193368000001
来源期刊	QUATERNARY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297256
作者单位	Queensland University of Technology (QUT); Seqwater; Wageningen University & Research; University of Lincoln
推荐引用方式 GB/T 7714	Croke, Jacky,Thompson, Chris,Larsen, Annegret,et al. Fluvial Response to Environmental Change in Sub-Tropical Australia over the Past 220 Ka[J],2024,7(1).
APA	Croke, Jacky,Thompson, Chris,Larsen, Annegret,Macklin, Mark,&Hughes, Kate.(2024).Fluvial Response to Environmental Change in Sub-Tropical Australia over the Past 220 Ka.QUATERNARY,7(1).
MLA	Croke, Jacky,et al."Fluvial Response to Environmental Change in Sub-Tropical Australia over the Past 220 Ka".QUATERNARY 7.1(2024).