气候变化领域集成服务门户(CCPortal): Western Mediterranean hydro-climatic consequences of Holocene ice-rafted debris (Bond) events

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DOI	10.5194/cp-15-463-2019
	Western Mediterranean hydro-climatic consequences of Holocene ice-rafted debris (Bond) events
	Zielhofer C.; Köhler A.; Mischke S.; Benkaddour A.; Mikdad A.; Fletcher W.J.
发表日期	2019
ISSN	18149324
起始页码	463
结束页码	475
卷号	15 期号:2
英文摘要	Gerard C. Bond established a Holocene series of North Atlantic ice-rafted debris events based on quartz and haematite-stained grains recovered from subpolar North Atlantic marine cores. These so-called "Bond events" document nine large-scale and multi-centennial North Atlantic cooling phases that might be linked to a reduced thermohaline circulation. Regardless of the high prominence of the Holocene North Atlantic ice-rafted debris record, there are critical scientific comments on the study: the Holocene Bond curve has not yet been replicated in other marine archives of the North Atlantic and there exist only very few palaeoclimatic studies that indicate all individual Bond events in their own record. Therefore, evidence of consistent hydro-climatic teleconnections between the subpolar North Atlantic and distant regions is not clear. In this context, the Western Mediterranean region presents key hydro-climatic sites for the reconstruction of a teleconnection with the subpolar North Atlantic. In particular, variability in Western Mediterranean winter precipitation might be the result of atmosphere-ocean coupled processes in the outer-tropical North Atlantic realm. Based on an improved Holocene δ18O record from Lake Sidi Ali (Middle Atlas, Morocco), we correlate Western Mediterranean precipitation anomalies with North Atlantic Bond events to identify a probable teleconnection between Western Mediterranean winter rains and subpolar North Atlantic cooling phases. Our data show a noticeable similarity between Western Mediterranean winter rain minima and Bond events during the Early Holocene and an opposite pattern during the Late Holocene. There is evidence of an enduring hydro-climatic change in the overall Atlantic atmosphere-ocean system and the response to external forcing during the Middle Holocene. Regarding a potential climatic anomaly around 4.2ka (Bond event 3) in the Western Mediterranean, a centennial-scale winter rain maximum is generally in-phase with the overall pattern of alternating "wet and cool" and "dry and warm" intervals during the last 5000 years. © 2019 The Author(s).
语种	英语
scopus关键词	atmosphere-ocean system; cooling; Holocene; hydrometeorology; ice-rafted debris; marine environment; precipitation (climatology); reconstruction; teleconnection; thermohaline circulation; Aguelmame Sidi Ali Lake; Atlantic Ocean; Atlantic Ocean (North); Atlas Mountains; Beni Mellal-Khenifra; Mediterranean Sea; Mediterranean Sea (West); Middle Atlas; Morocco; Morocco
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146843
作者单位	Institute of Geography, Leipzig University, Leipzig, 04103, Germany; Faculty of Earth Sciences, University of Iceland, Reykjavík101, Iceland; Department of Earth Sciences, Faculty of Science and Technology, Cadi Ayyad University, Marrakech-Guéliz, Morocco; Institut National des Sciences de l'Archéologie et du Patrimoine, Rabat, Morocco; Department of Geography, School of Environment, Education and Development, University of Manchester, Manchester, M13 9PL, United Kingdom
推荐引用方式 GB/T 7714	Zielhofer C.,Köhler A.,Mischke S.,et al. Western Mediterranean hydro-climatic consequences of Holocene ice-rafted debris (Bond) events[J],2019,15(2).
APA	Zielhofer C.,Köhler A.,Mischke S.,Benkaddour A.,Mikdad A.,&Fletcher W.J..(2019).Western Mediterranean hydro-climatic consequences of Holocene ice-rafted debris (Bond) events.Climate of the Past,15(2).
MLA	Zielhofer C.,et al."Western Mediterranean hydro-climatic consequences of Holocene ice-rafted debris (Bond) events".Climate of the Past 15.2(2019).