气候变化领域集成服务门户(CCPortal): Tracking Holocene palaeostratification and productivity changes in the Western Irish Sea: A multi-proxy record

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DOI	10.1016/j.palaeo.2019.06.004
	Tracking Holocene palaeostratification and productivity changes in the Western Irish Sea: A multi-proxy record
	Woods M.A.; Wilkinson I.P.; Leng M.J.; Riding J.B.; Vane C.H.; Lopes dos Santos R.A.; Kender S.; De Schepper S.; Hennissen J.A.I.; Ward S.L.; Gowing C.J.B.; Wilby P.R.; Nichols M.D.; Rochelle C.A.
发表日期	2019
ISSN	0031-0182
卷号	532
英文摘要	The Western Irish Sea preserves an exceptionally thick (ca. 40 m) Holocene succession that is ideally suited to understanding the pattern of palaeostratification and water mass productivity changes in the region, and their relationship with sea level, sedimentation, and biota. Additionally, the presence of shallow-buried methane provides an opportunity to explore its potential impact on the local pattern of Holocene marine environmental change. Multi-proxy investigation of a cored borehole succession through the Holocene interval tracks changes from mixed to seasonally stratified conditions. In the earliest Holocene (11.2–10 ka), high productivity, mixed water conditions prevailed, with abundant and diverse foraminifera and dominant heterotrophic dinoflagellate cysts. Productivity was probably driven by high nutrient fluxes related to high rates of sedimentation (>1600 cm/kyr), in turn influenced by relatively low sea level and restricted sediment accommodation space across shelf areas to the east of the borehole site (eastern Irish Sea Basin). With rising sea level in the later part of the Early Holocene, the region evolved into a relatively lower productivity mixed water mass system, with significant changes in ecology revealed by dinoflagellate cysts and foraminifera. In the latest Early Holocene and earliest Mid Holocene (ca. 8.4–8.2 ka) a return to higher productivity is signalled by dinoflagellate cyst data; a result of seasonal stratification becoming established, evidenced by sharply increased summer sea surface temperature estimates (typically 16–17 °C) that contrast with an opposite (more positive) trend in δ18O values for benthic foraminifera. Reductions in turbulent mixing associated with stratification might have exacerbated the palaeoecological impact of shallow-buried methane associated with the borehole site, potentially evidenced by a significant change in dominant benthic foraminifera and strong, localised excursions in the benthic δ13C/δ18O record. © 2019
英文关键词	Methane; Microfossils; Palaeotidal modelling; Rock-Eval; Sea surface temperature; Stable isotopes
语种	英语
scopus关键词	benthic foraminifera; biostratigraphy; dinoflagellate cyst; Holocene; methane; microfossil; paleobotany; paleoenvironment; sea surface temperature; stable isotope; stratification; Dinophyceae; Foraminifera
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150862
作者单位	British Geological Survey, Nottingham, United Kingdom; Centre for Environmental Geochemistry, University of Nottingham, United Kingdom; NERC Isotope Geosciences Laboratory, British Geological Survey, Nottingham, United Kingdom; NORCE Climate, NORCE Norwegian Research Centre AS, Bjerknes Centre for Climate Research, Bergen, Norway; Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, United Kingdom; Centre for Applied Marine Sciences, School of Ocean Sciences, Menai Bridge, Bangor University, United Kingdom; Camborne School of Mines, University of Exeter, Penryn, Cornwall, United Kingdom
推荐引用方式 GB/T 7714	Woods M.A.,Wilkinson I.P.,Leng M.J.,et al. Tracking Holocene palaeostratification and productivity changes in the Western Irish Sea: A multi-proxy record[J],2019,532.
APA	Woods M.A..,Wilkinson I.P..,Leng M.J..,Riding J.B..,Vane C.H..,...&Rochelle C.A..(2019).Tracking Holocene palaeostratification and productivity changes in the Western Irish Sea: A multi-proxy record.Palaeogeography, Palaeoclimatology, Palaeoecology,532.
MLA	Woods M.A.,et al."Tracking Holocene palaeostratification and productivity changes in the Western Irish Sea: A multi-proxy record".Palaeogeography, Palaeoclimatology, Palaeoecology 532(2019).