气候变化领域集成服务门户(CCPortal): Timing of iceberg scours and massive ice-rafting events in the subtropical North Atlantic

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DOI	10.1038/s41467-021-23924-0
	Timing of iceberg scours and massive ice-rafting events in the subtropical North Atlantic
	Condron A.; Hill J.C.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	High resolution seafloor mapping shows extraordinary evidence that massive (>300 m thick) icebergs once drifted >5,000 km south along the eastern United States, with >700 iceberg scours now identified south of Cape Hatteras. Here we report on sediment cores collected from several buried scours that show multiple plow marks align with Heinrich Event 3 (H3), ~31,000 years ago. Numerical glacial iceberg simulations indicate that the transport of icebergs to these sites occurs during massive, but short-lived, periods of elevated meltwater discharge. Transport of icebergs to the subtropics, away from deep water formation sites, may explain why H3 was associated with only a modest increase in ice-rafting across the subpolar North Atlantic, and implies a complex relationship between freshwater forcing and climate change. Stratigraphy from subbottom data across the scour marks shows there are additional features that are both older and younger, and may align with other periods of elevated meltwater discharge. © 2021, The Author(s).
语种	英语
scopus关键词	carbonic acid; fresh water; glauconite; phosphorite; unclassified drug; climate change; deep water formation; ice rafting; iceberg; meltwater; seafloor mapping; Article; climate change; environmental erosion; global climate; Gulf stream; ice rafting; iceberg; iceberg scour; sample; sediment transport; sedimentology; simulation; solar radiation; stratigraphy; thermodynamics; Atlantic Ocean; Atlantic Ocean (North); Cape Hatteras; Hatteras Island; North Carolina; United States
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251413
作者单位	Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; United States Geological Survey, Pacific Coastal & Marine Science Center, Santa Cruz, CA, United States
推荐引用方式 GB/T 7714	Condron A.,Hill J.C.. Timing of iceberg scours and massive ice-rafting events in the subtropical North Atlantic[J],2021,12(1).
APA	Condron A.,&Hill J.C..(2021).Timing of iceberg scours and massive ice-rafting events in the subtropical North Atlantic.Nature Communications,12(1).
MLA	Condron A.,et al."Timing of iceberg scours and massive ice-rafting events in the subtropical North Atlantic".Nature Communications 12.1(2021).