气候变化领域集成服务门户(CCPortal): Late pleistocene paleoceanographic changes in the Ross Sea – Glacial-interglacial variations in paleoproductivity; nutrient utilization; and deep-water formation

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DOI	10.1016/j.quascirev.2020.106356
	Late pleistocene paleoceanographic changes in the Ross Sea – Glacial-interglacial variations in paleoproductivity; nutrient utilization; and deep-water formation
	Kim S.; Lee J.I.; McKay R.M.; Yoo K.-C.; Bak Y.-S.; Lee M.K.; Roh Y.H.; Yoon H.I.; Moon H.S.; Hyun C.-U.
发表日期	2020
ISSN	0277-3791
卷号	239
英文摘要	The outer Ross Sea continental shelf has experienced large variations in ice sheet extent over the Pleistocene that are theorized to be largely driven by changes in the westward-flowing Antarctic Slope Current (ASC) at the continental shelf break. This current regulates southward incursions of warm modified Circumpolar Water, and it is thought to have triggered past marine ice sheet retreat. Additionally, expansions of grounded ice sheets on the continental shelf have fundamentally altered the Ross Sea water mass formation processes, influencing surface water salinity, sea ice cover, nutrient utilization, deep-water ventilation, and primary productivity. Here, we report the geochemical, physical properties, grain size, bulk δ15N, and diatom records during the late Pleistocene from two sediment cores from the Iselin Bank on the outermost continental shelf in the Ross Sea. These core sites were not overridden by grounded ice sheets during the late Pleistocene glacial-interglacial cycles, allowing for a continuous archive of glacimarine environments that were influenced by the ASC. Interglacial periods are typically characterized by high surface water productivity and nutrient utilization, with Chaetoceros resting spores indicating nutrient limitation under open ocean conditions, and glacial periods are typically characterized by low surface water productivity and nutrient utilization, with sea ice diatoms and planktonic foraminifers indicating light limitation under extensive sea ice/ice margin proximal conditions. A grain size analysis indicates coarse-skewed distributions and winnowing in the Iselin Bank region during cold periods. The winnowing may be related to enhanced ASC flow instead of density driven shelf water outflow. © 2020 Elsevier Ltd
英文关键词	Antarctic slope current; Carbonate; Deep-water formation; Nutrient utilization; Paleoproductivity; Pleistocene; Ross sea
语种	英语
scopus关键词	Glacial geology; Glaciers; Grain size and shape; Nutrients; Phytoplankton; Sea ice; Seawater; Continental shelves; Deep-water formation; Grain size analysis; Interglacial periods; Nutrient limitations; Nutrient utilization; Primary productivity; Skewed distribution; Surface waters; continental shelf; diatom; ice cover; ice sheet; interglacial; paleoceanography; Pleistocene; primary production; sediment core; water mass; Ross Sea; Southern Ocean; Bacillariophyta; Chaetoceros; Foraminifera
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/151457
作者单位	Korea Polar Research Institute, Incheon, 21990, South Korea; Antarctic Research Centre, Victoria University of Wellington, Wellington, 6140, New Zealand; Department of Earth and Environmental Sciences, Chonbuk National University, Jeonju, 54896, South Korea; University of Science and Technology, Daejeon, 34113, South Korea
推荐引用方式 GB/T 7714	Kim S.,Lee J.I.,McKay R.M.,等. Late pleistocene paleoceanographic changes in the Ross Sea – Glacial-interglacial variations in paleoproductivity; nutrient utilization; and deep-water formation[J],2020,239.
APA	Kim S..,Lee J.I..,McKay R.M..,Yoo K.-C..,Bak Y.-S..,...&Hyun C.-U..(2020).Late pleistocene paleoceanographic changes in the Ross Sea – Glacial-interglacial variations in paleoproductivity; nutrient utilization; and deep-water formation.Quaternary Science Reviews,239.
MLA	Kim S.,et al."Late pleistocene paleoceanographic changes in the Ross Sea – Glacial-interglacial variations in paleoproductivity; nutrient utilization; and deep-water formation".Quaternary Science Reviews 239(2020).