干旱区生态环境知识资源中心(Arid): Hydro-climate characteristics of the karst system of Wintimdouine cave (Western High Atlas, Morocco): monitoring and implications for paleoclimate research

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DOI	10.1007/s12665-019-8496-5
	Hydro-climate characteristics of the karst system of Wintimdouine cave (Western High Atlas, Morocco): monitoring and implications for paleoclimate research
	Brahim, Yassine Ait 1; Bouchaou, Lhoussaine 2; Sifeddine, Abdelfettah 3; Beraaouz, El Hassane 2; Wanaim, Abderrahmane 2; Cheng, Hai 1
通讯作者	Brahim, Yassine Ait
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2019
卷号	78 期号:16
英文摘要	The cave of Wintimdouine, located in a semi-arid context in Morocco, comprises the longest-known underground river in Africa. This cave system faces many challenges related to anthropogenic and climate forcing. Therefore, it has become necessary to understand the functioning of the aquifer system of Wintimdouine and how the regional climate affects its environment. Herein, we used different approaches based on a 4-year monitoring to shed light on the hydro-chemical behavior and stable isotopes contents of water samples, climate settings inside the cave, and moisture trajectory analyses. Chemical analyses show that groundwater is dominated by bicarbonate and calcite with an excellent chemical quality of cave water, suggesting an active recharge of the aquifer system which constitutes the main drinking source in the region. The stable isotope composition is consistent among rainwater, cave water and groundwater samples outside the cave. The evaporation effect is not significant, probably due to the rapid infiltration of surface water to the epikarst and vadose zone, which is favored by the abundance of exo-karstic forms above the cave. The cave monitoring indicates that periods of increased drip water flow induce an increase of temperature and humidity inside the cave, mainly during the spring-summer season. The high relative humidity and the relatively stable temperature favor the carbonate deposition under equilibrium conditions with drip water inside the cave. Furthermore, the moisture trajectory analysis confirms that the predominant air masses reach Wintimdouine cave from the North Atlantic Ocean, consistent with the mean deuterium-excess value of rainwater samples and the NAO-related westerly winds. Hence, we highlight the potential of Wintimdouine speleothem delta O-18 as a proxy of past climate variability at a regional scale.
英文关键词	Underground river Stable isotopes Moisture trajectories Cave monitoring Climate variability NAO
类型	Article
语种	英语
国家	Peoples R China ; Morocco ; France
收录类别	SCI-E
WOS记录号	WOS:000480489000003
WOS关键词	NORTH-ATLANTIC OSCILLATION ; OXYGEN-ISOTOPE COMPOSITION ; PRECIPITATION ; SPELEOTHEM ; IMPACT ; WATER ; DELTA-O-18 ; RESOURCES ; MASSA
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215437
作者单位	1.Xian Jiatong Univ, Inst Global Environm Change, Xian, Shaanxi, Peoples R China; 2.Ibn Zohr Univ, Lab Appl Geol & Geoenvironm, Agadir, Morocco; 3.Sorbonne Univ, IRD, UMR LOCEAN, UPMC,CNRS,MNHN,Ctr IRD, Bondy, France
推荐引用方式 GB/T 7714	Brahim, Yassine Ait,Bouchaou, Lhoussaine,Sifeddine, Abdelfettah,et al. Hydro-climate characteristics of the karst system of Wintimdouine cave (Western High Atlas, Morocco): monitoring and implications for paleoclimate research[J]. French National Research Institute for Sustainable Development,2019,78(16).
APA	Brahim, Yassine Ait,Bouchaou, Lhoussaine,Sifeddine, Abdelfettah,Beraaouz, El Hassane,Wanaim, Abderrahmane,&Cheng, Hai.(2019).Hydro-climate characteristics of the karst system of Wintimdouine cave (Western High Atlas, Morocco): monitoring and implications for paleoclimate research.ENVIRONMENTAL EARTH SCIENCES,78(16).
MLA	Brahim, Yassine Ait,et al."Hydro-climate characteristics of the karst system of Wintimdouine cave (Western High Atlas, Morocco): monitoring and implications for paleoclimate research".ENVIRONMENTAL EARTH SCIENCES 78.16(2019).