globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2021.116910
论文题名:
Enhanced iceberg discharge in the western North Atlantic during all Heinrich events of the last glaciation
作者: Zhou Y.; McManus J.F.; Jacobel A.W.; Costa K.M.; Wang S.; Alvarez Caraveo B.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 564
语种: 英语
中文关键词: Heinrich event ; IRD flux ; thorium normalization ; western North Atlantic
英文关键词: Debris ; Glacial geology ; Glaciers ; Oceanography ; Sediments ; Thorium ; Deep sea sediment ; Heinrich Events ; Ice rafted debris ; Ice-rafted debris flux ; Iceberg discharges ; Laurentide ice sheets ; Sediment core ; Thorium normalization ; Western north atlantic ; Sea ice ; glacial sedimentation ; Heinrich event ; Last Glacial ; last glaciation ; meltwater ; thorium ; Indicator indicator
英文摘要: A series of catastrophic iceberg and meltwater discharges to the North Atlantic, termed Heinrich events, punctuated the last ice age. During Heinrich events, coarse terrigenous debris released from the drifting icebergs was preserved in deep-sea sediments, serving as an indicator of iceberg passage. Quantifying the vertical flux of ice-rafted debris (IRD) in open-ocean settings can resolve questions regarding the timing and spatial variation in ice sheet calving intensity. In this study, 230Thxs-based IRD flux throughout the last glacial period was measured in a deep-sea sediment core from the western North Atlantic, and complemented by data spanning 0-32 ka from a sediment core in the Labrador Sea. The cores were recovered from sites downstream from Hudson Strait, a likely conduit for icebergs calving from the Laurentide ice sheet (LIS). We compare our results with equivalent existing data from the eastern North Atlantic and show that the two cores in our study have higher IRD fluxes during all Heinrich events, notably including events H3 (∼31 ka) and H6 (∼60 ka). This study demonstrates that the LIS played a role in all Heinrich events, and raises the likelihood that a single mechanism can account for the genesis of these events. © 2021 Elsevier B.V.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165756
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, United States; Dept. of Earth and Environmental Sciences, Columbia University, New York, NY 10027, United States

Recommended Citation:
Zhou Y.,McManus J.F.,Jacobel A.W.,et al. Enhanced iceberg discharge in the western North Atlantic during all Heinrich events of the last glaciation[J]. Earth and Planetary Science Letters,2021-01-01,564
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Zhou Y.]'s Articles
[McManus J.F.]'s Articles
[Jacobel A.W.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Zhou Y.]'s Articles
[McManus J.F.]'s Articles
[Jacobel A.W.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Zhou Y.]‘s Articles
[McManus J.F.]‘s Articles
[Jacobel A.W.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.