气候变化领域集成服务门户(CCPortal): Atmospheric response to mid-Holocene warming in the northeastern Atlantic: Implications for future storminess in the Ireland/UK region

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DOI	10.1016/j.quascirev.2019.106004
	Atmospheric response to mid-Holocene warming in the northeastern Atlantic: Implications for future storminess in the Ireland/UK region
	Curran M.J.; Rosenthal Y.; Wright J.D.; Morley A.
发表日期	2019
ISSN	0277-3791
卷号	225
英文摘要	There is increasing evidence that accelerated warming at high-latitudes is associated with increased climate variability at mid-latitudes, including the frequency and intensity of storms. However, due to short instrumental records our understanding of how ocean-atmosphere dynamics operate during warmer than present climates remains limited. Here we present a palaeoceanographic investigation of the transition between the middle Holocene intervals of the Northgrippian (8.2–4.2 ka) and the late Holocene interval of the Meghalayan (4.2–0 ka) to test the hypothesis of an eastward shift of the Icelandic Low under warmer than present climate scenarios. Reconstructions of bottom water temperatures (BWT) and stable oxygen isotopes (Mg/Ca, δ18O) using the benthic foraminifera Hyalinea balthica reveal warmer than present BWT of up to 2.6 ± 0.7 °C on the Irish Continental Shelf until circa 4.2 ka. The results suggest that Atlantic waters of subtropical origins were more prevalent in the eastern subpolar gyre (SPG) and on the Irish Continental Shelf. We link this oceanographic signature to an eastward shift of the Icelandic Low. We then place our local temperature record into an extra-regional context, using a combination of modern observations and existing palaeo datasets, which enables us to assess the impact of changing atmospheric modes on ocean-atmosphere climate linkages within the North Atlantic Region. The enhanced influence of warm subtropical Atlantic waters recirculating along the boundaries of the SPG under this scenario, would potentially have enhanced melt rates of marine-terminating glaciers on the east Greenland Shelf during the Northgrippian. © 2019 Elsevier Ltd
英文关键词	Foraminifers; Holocene; North Atlantic; Organic geochemistry; Paleoceanography
语种	英语
scopus关键词	Backward wave tubes; Geochemistry; Oceanography; Storms; Tropics; Foraminifers; Holocenes; North Atlantic; Organic geochemistry; Paleoceanography; Climatology; atmosphere-ice-ocean system; atmosphere-ocean coupling; benthic foraminifera; bottom water; continental shelf; Holocene; midlatitude environment; organic geochemistry; paleoceanography; seawater; storm; Arctic; Atlantic Ocean; Atlantic Ocean (Northeast); Greenland; Ireland; United Kingdom; Foraminifera; Hyalinea balthica
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151693
作者单位	School of Geography and Archaeology and The Ryan Institute at the National University of Ireland Galway, Ireland; Department of Marine and Coastal Sciences and Department of Earth and Planetary Sciences, Rutgers, The State University of New Jersey, 71 Dudley Road, New Brunswick, NJ 08901, United States; Department of Earth and Planetary Sciences, Rutgers, The State University of New Jersey, 71 Dudley Road, New Brunswick, NJ 08901, United States; iCRAG – Irish Centre for Research in Applied Geosciences, Ireland
推荐引用方式 GB/T 7714	Curran M.J.,Rosenthal Y.,Wright J.D.,et al. Atmospheric response to mid-Holocene warming in the northeastern Atlantic: Implications for future storminess in the Ireland/UK region[J],2019,225.
APA	Curran M.J.,Rosenthal Y.,Wright J.D.,&Morley A..(2019).Atmospheric response to mid-Holocene warming in the northeastern Atlantic: Implications for future storminess in the Ireland/UK region.Quaternary Science Reviews,225.
MLA	Curran M.J.,et al."Atmospheric response to mid-Holocene warming in the northeastern Atlantic: Implications for future storminess in the Ireland/UK region".Quaternary Science Reviews 225(2019).