气候变化领域集成服务门户(CCPortal): Sill-controlled salinity contrasts followed post-Messinian flooding of the Mediterranean

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DOI	10.1038/s41561-022-00998-z
	Sill-controlled salinity contrasts followed post-Messinian flooding of the Mediterranean
	Amarathunga, Udara; Hogg, Andrew McC; Rohling, Eelco J.; Roberts, Andrew P.; Grant, Katharine M.; Heslop, David; Hu, Pengxiang; Liebrand, Diederik; Westerhold, Thomas; Zhao, Xiang; Gilmore, Stewart
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	720
结束页码	+
卷号	15 期号:9 页码:24
英文摘要	A mile-high marine cascade terminated the Messinian salinity crisis 5.33 Myr ago, due to partial collapse of the Gibraltar sill that had isolated a largely desiccated Mediterranean from the Atlantic Ocean. Atlantic waters may have refilled the basin within 2 years. Prevailing hypotheses suggest that normal marine conditions were established across the Mediterranean immediately after the catastrophic flooding. Here we use proxy data and fluid physics-based modelling to show that normal conditions were likely for the western Mediterranean, but that flooding caused a massive transfer of salt from the western to the eastern Mediterranean across the Sicily sill, which became a hyper-salinity-stratified basin. Hyper-stratification inhibited deep-water ventilation, causing anomalously long-lasting organic-rich (sapropel) sediment deposition. Model data agreement indicates that hyper-stratification breakdown by diapycnal diffusion required 26,000 years. An alternative hypothesis that Atlantic reconnection occurred after the Mediterranean had largely been refilled is inconsistent with our observations, as this would have led to hyper-stratification and sapropel formation in both basins. Our findings offer insight into the role of stratification in delaying the re-establishment of normal marine conditions following abrupt refilling of a previously desiccated ocean basin.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000839529500003
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272481
作者单位	Australian National University; NERC National Oceanography Centre; University of Southampton; University of Bremen; Geoscience Australia
推荐引用方式 GB/T 7714	Amarathunga, Udara,Hogg, Andrew McC,Rohling, Eelco J.,et al. Sill-controlled salinity contrasts followed post-Messinian flooding of the Mediterranean[J],2022,15(9):24.
APA	Amarathunga, Udara.,Hogg, Andrew McC.,Rohling, Eelco J..,Roberts, Andrew P..,Grant, Katharine M..,...&Gilmore, Stewart.(2022).Sill-controlled salinity contrasts followed post-Messinian flooding of the Mediterranean.NATURE GEOSCIENCE,15(9),24.
MLA	Amarathunga, Udara,et al."Sill-controlled salinity contrasts followed post-Messinian flooding of the Mediterranean".NATURE GEOSCIENCE 15.9(2022):24.