在托尔托尼-梅西尼过渡时期,地中海东部受到盐度快速大幅波动的影响

IF 2.6 2区 地球科学 Q2 GEOGRAPHY, PHYSICAL Palaeogeography, Palaeoclimatology, Palaeoecology Pub Date : 2024-10-30 DOI:10.1016/j.palaeo.2024.112568
Evangelia Besiou , Iuliana Vasiliev , George Kontakiotis , Konstantina Agiadi , Katharina Methner , Andreas Mulch , Wout Krijgsman , Assimina Antonarakou
{"title":"在托尔托尼-梅西尼过渡时期,地中海东部受到盐度快速大幅波动的影响","authors":"Evangelia Besiou ,&nbsp;Iuliana Vasiliev ,&nbsp;George Kontakiotis ,&nbsp;Konstantina Agiadi ,&nbsp;Katharina Methner ,&nbsp;Andreas Mulch ,&nbsp;Wout Krijgsman ,&nbsp;Assimina Antonarakou","doi":"10.1016/j.palaeo.2024.112568","DOIUrl":null,"url":null,"abstract":"<div><div>Restricted marine basins are highly sensitive to climatic fluctuations, yet, paleoenvironmental responses to gateway restriction frequently remain unclear. Here, we investigate the Mediterranean Sea that experienced gradually restricted conditions starting during the late Tortonian and culminating with complete isolation from the Atlantic during the peak of the Messinian Salinity Crisis. We established sea surface temperature and salinity records during the Tortonian to Messinian transition (7.52–7.20 Ma) through coupled analysis of organic biomarkers and oxygen and carbon isotope ratios of planktonic foraminifera from the eastern Mediterranean basin (Potamida section, Crete Island, Greece). We further contrast these sea surface data with stable isotope records of benthonic foraminifera to identify periods of increased density-driven deterioration of bottom water ventilation in the basin. The combined results show that normal marine conditions, expressed by relatively warm (27.5 °C) Tortonian surface waters with normal salinity (38) prevailed until 7.36 Ma. The 7.36–7.32 Ma interval is characterized by pulses of increased bottom water salinity, that contrast the lasting normal salinity (39) at the sea surface, indicating strengthened water column stratification provoked by sluggish water circulation already prior to the Tortonian–Messinian boundary. A brief return to marine conditions, similar to the time prior to 7.36 Ma, re-appeared between 7.32 and 7.31 Ma. Between 7.31 and 7.28 Ma, a rebound to enhanced stratification took place accompanied by a high-amplitude, stepwise decrease in both sea surface temperature and sea surface salinity. Ultimately, the Tortonian–Messinian boundary was characterized by lower sea surface temperature and salinity accompanied by increased salinity and/or colder bottom waters. A ∼ 10 °C cooling episode (at 7.212 Ma) highlights the regional importance of the global Late Miocene cooling event.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Large and rapid salinity fluctuations affected the eastern Mediterranean at the Tortonian–Messinian transition\",\"authors\":\"Evangelia Besiou ,&nbsp;Iuliana Vasiliev ,&nbsp;George Kontakiotis ,&nbsp;Konstantina Agiadi ,&nbsp;Katharina Methner ,&nbsp;Andreas Mulch ,&nbsp;Wout Krijgsman ,&nbsp;Assimina Antonarakou\",\"doi\":\"10.1016/j.palaeo.2024.112568\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Restricted marine basins are highly sensitive to climatic fluctuations, yet, paleoenvironmental responses to gateway restriction frequently remain unclear. Here, we investigate the Mediterranean Sea that experienced gradually restricted conditions starting during the late Tortonian and culminating with complete isolation from the Atlantic during the peak of the Messinian Salinity Crisis. We established sea surface temperature and salinity records during the Tortonian to Messinian transition (7.52–7.20 Ma) through coupled analysis of organic biomarkers and oxygen and carbon isotope ratios of planktonic foraminifera from the eastern Mediterranean basin (Potamida section, Crete Island, Greece). We further contrast these sea surface data with stable isotope records of benthonic foraminifera to identify periods of increased density-driven deterioration of bottom water ventilation in the basin. The combined results show that normal marine conditions, expressed by relatively warm (27.5 °C) Tortonian surface waters with normal salinity (38) prevailed until 7.36 Ma. The 7.36–7.32 Ma interval is characterized by pulses of increased bottom water salinity, that contrast the lasting normal salinity (39) at the sea surface, indicating strengthened water column stratification provoked by sluggish water circulation already prior to the Tortonian–Messinian boundary. A brief return to marine conditions, similar to the time prior to 7.36 Ma, re-appeared between 7.32 and 7.31 Ma. Between 7.31 and 7.28 Ma, a rebound to enhanced stratification took place accompanied by a high-amplitude, stepwise decrease in both sea surface temperature and sea surface salinity. Ultimately, the Tortonian–Messinian boundary was characterized by lower sea surface temperature and salinity accompanied by increased salinity and/or colder bottom waters. A ∼ 10 °C cooling episode (at 7.212 Ma) highlights the regional importance of the global Late Miocene cooling event.</div></div>\",\"PeriodicalId\":19928,\"journal\":{\"name\":\"Palaeogeography, Palaeoclimatology, Palaeoecology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.6000,\"publicationDate\":\"2024-10-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Palaeogeography, Palaeoclimatology, Palaeoecology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0031018224005571\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOGRAPHY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Palaeogeography, Palaeoclimatology, Palaeoecology","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0031018224005571","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

摘要

受限的海洋盆地对气候波动高度敏感,然而,对门户受限的古环境反应往往仍不清楚。在此,我们对地中海进行了研究,该海域从托尔托尼晚期开始逐渐受到限制,最终在梅西尼盐度危机高峰期与大西洋完全隔绝。我们通过对地中海盆地东部(希腊克里特岛波塔米达断面)浮游有孔虫的有机生物标志物及氧和碳同位素比值的耦合分析,建立了托尔托尼至梅西尼过渡时期(7.52-7.20 Ma)的海面温度和盐度记录。我们进一步将这些海面数据与底栖有孔虫的稳定同位素记录进行对比,以确定该盆地底层水通气状况因密度增加而恶化的时期。综合结果表明,正常的海洋条件,即相对温暖(27.5 °C)、盐度正常(38)的托尔托尼亚表层海水,一直持续到 7.36 Ma。在 7.36-7.32 Ma 期间,底层水盐度呈脉冲式上升,与海面持久的正常盐度(39)形成鲜明对比,表明在托尔托尼-美西尼边界之前,由于水循环迟缓,水柱分层现象已经加强。在 7.32 至 7.31 Ma 之间,海洋条件短暂恢复,与 7.36 Ma 之前的情况相似。在 7.31 至 7.28 Ma 期间,伴随着海面温度和海面盐度的高振幅、阶梯式下降,出现了强化分层的反弹。最终,托尔托尼-梅西尼边界的特征是海面温度和盐度降低,同时盐度增加和/或底层水变冷。10 °C的降温事件(7.212 Ma)突出了全球晚中新世降温事件的区域重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Large and rapid salinity fluctuations affected the eastern Mediterranean at the Tortonian–Messinian transition
Restricted marine basins are highly sensitive to climatic fluctuations, yet, paleoenvironmental responses to gateway restriction frequently remain unclear. Here, we investigate the Mediterranean Sea that experienced gradually restricted conditions starting during the late Tortonian and culminating with complete isolation from the Atlantic during the peak of the Messinian Salinity Crisis. We established sea surface temperature and salinity records during the Tortonian to Messinian transition (7.52–7.20 Ma) through coupled analysis of organic biomarkers and oxygen and carbon isotope ratios of planktonic foraminifera from the eastern Mediterranean basin (Potamida section, Crete Island, Greece). We further contrast these sea surface data with stable isotope records of benthonic foraminifera to identify periods of increased density-driven deterioration of bottom water ventilation in the basin. The combined results show that normal marine conditions, expressed by relatively warm (27.5 °C) Tortonian surface waters with normal salinity (38) prevailed until 7.36 Ma. The 7.36–7.32 Ma interval is characterized by pulses of increased bottom water salinity, that contrast the lasting normal salinity (39) at the sea surface, indicating strengthened water column stratification provoked by sluggish water circulation already prior to the Tortonian–Messinian boundary. A brief return to marine conditions, similar to the time prior to 7.36 Ma, re-appeared between 7.32 and 7.31 Ma. Between 7.31 and 7.28 Ma, a rebound to enhanced stratification took place accompanied by a high-amplitude, stepwise decrease in both sea surface temperature and sea surface salinity. Ultimately, the Tortonian–Messinian boundary was characterized by lower sea surface temperature and salinity accompanied by increased salinity and/or colder bottom waters. A ∼ 10 °C cooling episode (at 7.212 Ma) highlights the regional importance of the global Late Miocene cooling event.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
5.90
自引率
10.00%
发文量
398
审稿时长
3.8 months
期刊介绍: Palaeogeography, Palaeoclimatology, Palaeoecology is an international medium for the publication of high quality and multidisciplinary, original studies and comprehensive reviews in the field of palaeo-environmental geology. The journal aims at bringing together data with global implications from research in the many different disciplines involved in palaeo-environmental investigations. By cutting across the boundaries of established sciences, it provides an interdisciplinary forum where issues of general interest can be discussed.
期刊最新文献
Functional diversity and resilience of bivalves after the Permian-Triassic mass extinction Meteorological influences on marine chemistry during the Cryogenian Sturtian glaciation Large and rapid salinity fluctuations affected the eastern Mediterranean at the Tortonian–Messinian transition Sediment source-to-sink patterns along the southeast China coast during the late Quaternary: New insights from sediment geochemistry and OSL ages in Ningde Bay Timing and origin of the Lomagundi-Jatuli Event: Insights from UPb geochronology, C-O-Fe isotopes and REE compositions from the Jingshan Group, North China Craton
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1