干旱区生态环境知识资源中心(Arid): Modern speleothem oxygen isotope hydroclimate records in water-limited SE Australia

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DOI	10.1016/j.gca.2019.12.007
	Modern speleothem oxygen isotope hydroclimate records in water-limited SE Australia
	Markowska, Monika 1,2,3,4; Cuthbert, Mark O.2,5; Baker, Andy 2,3; Treble, Pauline C.1,2; Andersen, Martin S.2,6; Adler, Lewis 7; Griffiths, Alan 1; Frisia, Silvia 8
通讯作者	Baker, Andy
来源期刊	GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN	0016-7037
EISSN	1872-9533
出版年	2020
卷号	270 页码:431-448
英文摘要	Dryland regions are generally projected to become drier under future climate change scenarios. Understanding the long-term natural variability of dryland regions via paleo-reconstructions is therefore highly desirable. The delta O-18 of two coeval modern speleothems from Cathedral Cave, Wellington, in semi-arid SE Australia are compared to the instrumental record to assess its efficacy as a proxy of past hydrological variability. Stalagmite delta O-1(8) was modulated by the frequency of recharge events and epikarst evaporation of storage water. Prolonged intervals between recharge events, such as droughts, resulted in higher stalagmite delta O-1(8). Conversely, periods with more frequent recharge events and a positive water balance, resulted in lower delta O-1(8). Disequilibrium cave processes are likely to be enhanced during dry conditions, although it is argued that these will modulate delta O-1(8)spel in the same direction as epikarst evaporation, effectively amplifying the response of delta O-1(8)spel. Extreme events, such as floods and droughts, were also captured in the stalagmite records, although potentially with a lag of several years. We verify that modern speleothems from semi-arid regions can be used to reconstruct hydroclimate due to variations in delta O-1(8)spel modulated by karst processes. Such records are archives of past changes in recharge rather than precipitation amount or surface temperature, as is commonly applied to speleothem records from non-water-limited regions. (C) 2019 Elsevier Ltd. All rights reserved.
英文关键词	Speleothems Water-limited climate Water isotopes Hydroclimate
类型	Article
语种	英语
国家	Australia ; Germany ; Wales
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000506666300024
WOS关键词	CAVE DRIP WATER ; STALAGMITE GROWTH ; STABLE-ISOTOPES ; VADOSE ZONE ; CARBON ; DELTA-O-18 ; RAINFALL ; SOIL ; EVAPORATION ; TEMPERATURE
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
EI主题词	2020-02-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312657
作者单位	1.ANSTO, Sydney, NSW 2234, Australia; 2.UNSW Sydney, Connected Waters Initiat Res Ctr, Sydney, NSW 2052, Australia; 3.UNSW Sydney, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia; 4.Tubingen Univ, Fac Geosci, D-72074 Tubingen, Germany; 5.Cardiff Univ, Sch Earth & Ocean Sci, Cardiff CF10 3AT, Wales; 6.UNSW Sydney, Sch Civil & Environm Engn, Sydney, NSW 2052, Australia; 7.UNSW Sydney, Mark Wainwright Analyt Ctr, Bioanalyt Mass Spectrometry Facil, Sydney, NSW 2052, Australia; 8.Univ Newcastle, Sch Environm & Life Sci, Callaghan, NSW 2308, Australia
推荐引用方式 GB/T 7714	Markowska, Monika,Cuthbert, Mark O.,Baker, Andy,et al. Modern speleothem oxygen isotope hydroclimate records in water-limited SE Australia[J],2020,270:431-448.
APA	Markowska, Monika.,Cuthbert, Mark O..,Baker, Andy.,Treble, Pauline C..,Andersen, Martin S..,...&Frisia, Silvia.(2020).Modern speleothem oxygen isotope hydroclimate records in water-limited SE Australia.GEOCHIMICA ET COSMOCHIMICA ACTA,270,431-448.
MLA	Markowska, Monika,et al."Modern speleothem oxygen isotope hydroclimate records in water-limited SE Australia".GEOCHIMICA ET COSMOCHIMICA ACTA 270(2020):431-448.