气候变化领域集成服务门户(CCPortal): Middle to Late Pleistocene Arctic paleoceanographic changes based on sedimentary records from Mendeleev Ridge and Makarov Basin

CCPortal

DOI	10.1016/j.quascirev.2019.106105
	Middle to Late Pleistocene Arctic paleoceanographic changes based on sedimentary records from Mendeleev Ridge and Makarov Basin
	Xiao W.; Polyak L.; Wang R.; Löwemark L.; Mei J.; You D.; Wang W.; Wu L.; Jin X.
发表日期	2020
ISSN	0277-3791
卷号	228
英文摘要	Three sediment cores from the Makarov Basin and Mendeleev Ridge off the Siberian margin were analyzed for a number of litho-, bio- and magnetostratigraphic proxies. Correlation to previously studied Arctic records from Mendeleev to Lomonosov ridges enables paleoceanographic reconstructions for the Middle to Late Pleistocene (estimated ∼0.8 Ma) on orbital time scales. Cyclic changes in lithology corroborated by multiple stratigraphic constraints were tuned to global climate variations based on the manganese content that increases during interglacials, while calcium and zircon were used as proxies for the Laurentide and Eurasian ice sheet inputs. The combined evaluation of glacial and interglacial proxy variabilities provides a coherent picture of the western Arctic Ocean development in the Pleistocene. We suggest that major cyclic changes were driven by summer processes, such as sea-ice retreat and enhanced biological production vs. suppressed ice melt in warmer and colder summers, respectively. A potential link to low latitudes via atmospheric moisture and heat transport is indicated by similarities in the western Arctic Ocean and East Asian monsoon records. Long-term cooling is signified by biogenic proxies related to sea-ice expansion over the western Arctic Ocean with step changes at MIS 11 and 7 (∼0.4 and 0.2–0.3 Ma). This transition also features better fossil preservation indicating less corrosive/oxidative bottom waters, probably resulting from a decrease in organic export production and/or weakening of bottom water ventilation under perennial sea ice. The latter was possibly enhanced by atmospheric cooling and increased meltwater fluxes with the growth of circum-Arctic ice sheets. © 2019 Elsevier Ltd
英文关键词	Arctic Ocean; Glaciations; Interglacials; Mendeleev Ridge; Orbital cyclicity; Paleocirculation; Quaternary stratigraphy; Sedimentary proxies
语种	英语
scopus关键词	Biological materials preservation; Glacial geology; Glaciers; Lithology; Oceanography; Sea ice; Sedimentology; Silicate minerals; Stratigraphy; Zircon; Arctic ocean; Cyclicity; Glaciations; Interglacials; Mendeleev Ridge; Paleocirculation; Quaternary stratigraphies; Sedimentary proxies; Seawater corrosion; atmospheric moisture; biological production; bottom water; calcium; fossil record; interglacial; lithology; magnetostratigraphy; meltwater; Pleistocene; preservation; sedimentary sequence; ventilation; zircon; Arctic Ocean; Makarov Basin; Mendeleyev Ridge
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/151631
作者单位	State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China; University Corporation for Polar Research, Beijing, 100875, China; Byrd Polar and Climate Research Center, The Ohio State University, Columbus, OH 43210, United States; Department of Geosciences, National Taiwan University, P.O. Box 13-318, Taipei, 106, Taiwan; Third Institute of Oceanography, SOA, Xiamen, 361005, China
推荐引用方式 GB/T 7714	Xiao W.,Polyak L.,Wang R.,et al. Middle to Late Pleistocene Arctic paleoceanographic changes based on sedimentary records from Mendeleev Ridge and Makarov Basin[J],2020,228.
APA	Xiao W..,Polyak L..,Wang R..,Löwemark L..,Mei J..,...&Jin X..(2020).Middle to Late Pleistocene Arctic paleoceanographic changes based on sedimentary records from Mendeleev Ridge and Makarov Basin.Quaternary Science Reviews,228.
MLA	Xiao W.,et al."Middle to Late Pleistocene Arctic paleoceanographic changes based on sedimentary records from Mendeleev Ridge and Makarov Basin".Quaternary Science Reviews 228(2020).