干旱区生态环境知识资源中心(Arid): Cold-water coral mounds in the western Mediterranean Sea: New insights into their initiation and development since the Mid-Pleistocene in response to changes of African hydroclimate

Arid

DOI	10.1016/j.quascirev.2022.107723
	Cold-water coral mounds in the western Mediterranean Sea: New insights into their initiation and development since the Mid-Pleistocene in response to changes of African hydroclimate
	Wienberg, C.; Krengel, T.; Frank, N.; Wang, H.; Van Rooij, D.; Hebbeln, D.
通讯作者	Wienberg, C
来源期刊	QUATERNARY SCIENCE REVIEWS
ISSN	0277-3791
EISSN	1873-457X
出版年	2022
卷号	293
英文摘要	This study presents sediment cores up to 70 m long collected by the sea floor drill rig MARUM-MeBo70 from cold-water coral mounds in the western Mediterranean Sea. From these cores, an unprecedented data set of 200 Th/U coral ages has been obtained, greatly expanding our knowledge of the evolution of Mediterranean coral mounds. The drill records provided new insights into the initiation of the Mediterranean coral mounds as the base of a 60-m-high mound was penetrated and dated to the Mid-Pleistocene (similar to 390 ka). We also found that mound initiation was non-synchronous as larger mounds possibly initiated already during the Mid-Pleistocene Transition. During the last 480 kyr, mound development occurred in short and intense pulses (duration: similar to 10-30 kyr; aggradation rates: 20-275 cm kyr(-1)), which could not be assigned to ice age-paced oscillations, but showed a remarkably coherent pattern with precession-driven changes in African hydroclimate. Increased dust supply, related to a desertification of the Sahara and northern Africa, appears to have boosted mound development by enhancing productivity conditions (to promote coral growth) and sediment supply (to promote mound aggradation). In addition, mound development is closely linked to the well-ventilated and nutrient-rich Levantine Intermediate Water and internal wave activity associated to this water mass that provided turbulent conditions and enhanced the lateral delivery of food and sediments. During African humid periods, increased freshwater input into the Mediterranean impaired the formation of Levantine Intermediate Water, which most likely resulted in low-energy and oxygen-depleted living conditions for Mediterranean coral communities. This study shows the importance to consider past changes in continental hydroclimate and their implications on oceanic processes to fully understand the complex environmental controls on coral mound development. In the Mediterranean Sea, such land-atmosphere-ocean feedback processes are especially amplified due to its latitudinal placement between two climate regimes, making this basin and its deep-sea ecosystems most vulnerable to past and future climate change. (C) 2022 The Authors. Published by Elsevier Ltd.
英文关键词	Cold-water coral mounds Mid-pleistocene African hydroclimate Dust supply Levantine intermediate water MeBo drill cores Uranium-series dating Mediterranean sea
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:000860292000002
WOS关键词	NORTH-ATLANTIC OSCILLATION ; ROCKALL TROUGH MARGIN ; CURRENT-CONTROLLED SEDIMENTATION ; MIDDLE PLEISTOCENE TRANSITION ; COVERED CARBONATE MOUND ; LAST GLACIAL MAXIMUM ; ALBORAN SEA ; LOPHELIA-PERTUSA ; MONSOON VARIABILITY ; CLIMATE VARIABILITY
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394107
推荐引用方式 GB/T 7714	Wienberg, C.,Krengel, T.,Frank, N.,et al. Cold-water coral mounds in the western Mediterranean Sea: New insights into their initiation and development since the Mid-Pleistocene in response to changes of African hydroclimate[J],2022,293.
APA	Wienberg, C.,Krengel, T.,Frank, N.,Wang, H.,Van Rooij, D.,&Hebbeln, D..(2022).Cold-water coral mounds in the western Mediterranean Sea: New insights into their initiation and development since the Mid-Pleistocene in response to changes of African hydroclimate.QUATERNARY SCIENCE REVIEWS,293.
MLA	Wienberg, C.,et al."Cold-water coral mounds in the western Mediterranean Sea: New insights into their initiation and development since the Mid-Pleistocene in response to changes of African hydroclimate".QUATERNARY SCIENCE REVIEWS 293(2022).