干旱区生态环境知识资源中心(Arid): Triple oxygen isotope systematics of evaporation and mixing processes in a dynamic desert lake system

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DOI	10.5194/hess-25-1211-2021
	Triple oxygen isotope systematics of evaporation and mixing processes in a dynamic desert lake system
	Voigt, Claudia; Herwartz, Daniel; Dorador, Cristina; Staubwasser, Michael
通讯作者	Voigt, C (corresponding author), Univ Cologne, Inst Geol & Mineral, Zulpicher Str 49b, D-50674 Cologne, Germany. ; Voigt, C (corresponding author), Aix Marseille Univ, Ctr Natl Rech Sci CNRS, CEREGE, Aix En Provence, France.
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN	1027-5606
EISSN	1607-7938
出版年	2021
卷号	25 期号:3 页码:1211-1228
英文摘要	This study investigates the combined hydrogen deuterium and triple oxygen isotope hydrology of the Salar del Huasco, an endorheic salt flat with shallow lakes at its centre that is located on the Altiplano Plateau, N Chile. This lacustrine system is hydrologically dynamic and complex because it receives inflow from multiple surface and groundwater sources. It undergoes seasonal flooding, followed by rapid shrinking of the water body at the prevailing arid climate with very high evaporation rates. At any given point in time, ponds, lakes, and recharge sources capture a large range of evaporation degrees. Samples taken between 2017 and 2019 show a range of delta O-18 between 13.3 parts per thousand and 14.5 parts per thousand, dexcess between 7 parts per thousand and 100 parts per thousand, and O-17-excess between 19 and -108 per meg. A pan evaporation experiment conducted on-site was used to derive the turbulence coefficient of the Craig-Gordon isotope evaporation model for the local wind regime. This, along with sampling of atmospheric vapour at the salar ( -21.0 +/- 3.3 parts per thousand for delta O-18, 34 +/- 6 parts per thousand for d-excess and 23 +/- 9 per meg for O-17-excess), enabled the accurate reproduction of measured ponds and lake isotope data by the Craig-Gordon model. In contrast to classic delta H-2- delta O-18 studies, the O-17-excess data not only allow one to distinguish two different types of evaporation - evaporation with and without recharge - but also to identify mixing processes between evaporated lake water and fresh flood water. Multiple generations of infiltration events can also be inferred from the triple oxygen isotope composition of inflow water, indicating mixing of sources with different evaporation histories. These processes cannot be resolved using classic delta H-2- delta O-18 data alone. Adding triple oxygen isotope measurements to isotope hydrology studies may therefore significantly im- prove the accuracy of a lake's hydrological balance - i.e. the evaporation-to-inflow ratio (E / I) - estimated by water isotope data and application of the Craig-Gordon isotope evaporation model.
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000627626700001
WOS关键词	AQUEOUS SALT-SOLUTIONS ; PAMPA DEL TAMARUGAL ; HYDROGEN ISOTOPES ; STABLE HYDROGEN ; ATACAMA DESERT ; WATER ; PRECIPITATION ; FRACTIONATION ; VARIABILITY ; PHYTOLITHS
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350515
作者单位	[Voigt, Claudia; Herwartz, Daniel; Staubwasser, Michael] Univ Cologne, Inst Geol & Mineral, Zulpicher Str 49b, D-50674 Cologne, Germany; [Voigt, Claudia] Aix Marseille Univ, Ctr Natl Rech Sci CNRS, CEREGE, Aix En Provence, France; [Dorador, Cristina] Univ Antofagasta, Ctr Biotecnol, Angamos 601, Antofagasta 1270300, Chile
推荐引用方式 GB/T 7714	Voigt, Claudia,Herwartz, Daniel,Dorador, Cristina,et al. Triple oxygen isotope systematics of evaporation and mixing processes in a dynamic desert lake system[J],2021,25(3):1211-1228.
APA	Voigt, Claudia,Herwartz, Daniel,Dorador, Cristina,&Staubwasser, Michael.(2021).Triple oxygen isotope systematics of evaporation and mixing processes in a dynamic desert lake system.HYDROLOGY AND EARTH SYSTEM SCIENCES,25(3),1211-1228.
MLA	Voigt, Claudia,et al."Triple oxygen isotope systematics of evaporation and mixing processes in a dynamic desert lake system".HYDROLOGY AND EARTH SYSTEM SCIENCES 25.3(2021):1211-1228.