Local summer insolation modulated Southern Ocean productivity and Antarctic icesheet evolution since MIS 5

IF 4 1区 地球科学 Q1 GEOGRAPHY, PHYSICAL Global and Planetary Change Pub Date : 2025-03-09 DOI:10.1016/j.gloplacha.2025.104789
Yihao Hu , Thomas J. Algeo , Tong Wang , Jingteng Guo , Zhifang Xiong , Tiegang Li
{"title":"Local summer insolation modulated Southern Ocean productivity and Antarctic icesheet evolution since MIS 5","authors":"Yihao Hu ,&nbsp;Thomas J. Algeo ,&nbsp;Tong Wang ,&nbsp;Jingteng Guo ,&nbsp;Zhifang Xiong ,&nbsp;Tiegang Li","doi":"10.1016/j.gloplacha.2025.104789","DOIUrl":null,"url":null,"abstract":"<div><div>The relationship of marine productivity in the Southern Ocean (SO) to dynamics of the Antarctic icesheet (AIS) since the Late Pleistocene remains uncertain. Here, we investigated Late Pleistocene variation in productivity in the Antarctic Zone of the SO, and the response of the AIS to various potential forcing mechanisms. We analyzed secular variation in multiple biogenic components and ice-rafted debris (IRD) of a sediment core (ANT34/D5–12) from the Atlantic sector of the SO. Productivity, as tracked by the fluxes of excess Ba and opal, was controlled mainly by local mean summer insolation, which also modulated icesheet dynamics, as revealed by IRD. These records nonetheless show distinct precessional variability (∼20 kyr cycle) related to austral summer insolation. During high (low) insolation intervals, productivity was high (low), and the AIS contracted (expanded). Based on these data and published paleoclimate records, we propose that marine productivity and icesheet dynamics during the Late Pleistocene were primarily controlled by local Antarctic summer mean insolation through regulation of water-column stratification depth. These findings support hypotheses for the independent evolution of Antarctic climate (i.e., not paced by Northern Hemisphere summer insolation) and provide new insights into biogeochemical cycling in the SO and AIS dynamics.</div></div>","PeriodicalId":55089,"journal":{"name":"Global and Planetary Change","volume":"249 ","pages":"Article 104789"},"PeriodicalIF":4.0000,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Global and Planetary Change","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921818125000980","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}
引用次数: 0

Abstract

The relationship of marine productivity in the Southern Ocean (SO) to dynamics of the Antarctic icesheet (AIS) since the Late Pleistocene remains uncertain. Here, we investigated Late Pleistocene variation in productivity in the Antarctic Zone of the SO, and the response of the AIS to various potential forcing mechanisms. We analyzed secular variation in multiple biogenic components and ice-rafted debris (IRD) of a sediment core (ANT34/D5–12) from the Atlantic sector of the SO. Productivity, as tracked by the fluxes of excess Ba and opal, was controlled mainly by local mean summer insolation, which also modulated icesheet dynamics, as revealed by IRD. These records nonetheless show distinct precessional variability (∼20 kyr cycle) related to austral summer insolation. During high (low) insolation intervals, productivity was high (low), and the AIS contracted (expanded). Based on these data and published paleoclimate records, we propose that marine productivity and icesheet dynamics during the Late Pleistocene were primarily controlled by local Antarctic summer mean insolation through regulation of water-column stratification depth. These findings support hypotheses for the independent evolution of Antarctic climate (i.e., not paced by Northern Hemisphere summer insolation) and provide new insights into biogeochemical cycling in the SO and AIS dynamics.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
求助全文
约1分钟内获得全文 去求助
来源期刊
Global and Planetary Change
Global and Planetary Change 地学天文-地球科学综合
CiteScore
7.40
自引率
10.30%
发文量
226
审稿时长
63 days
期刊介绍: The objective of the journal Global and Planetary Change is to provide a multi-disciplinary overview of the processes taking place in the Earth System and involved in planetary change over time. The journal focuses on records of the past and current state of the earth system, and future scenarios , and their link to global environmental change. Regional or process-oriented studies are welcome if they discuss global implications. Topics include, but are not limited to, changes in the dynamics and composition of the atmosphere, oceans and cryosphere, as well as climate change, sea level variation, observations/modelling of Earth processes from deep to (near-)surface and their coupling, global ecology, biogeography and the resilience/thresholds in ecosystems. Key criteria for the consideration of manuscripts are (a) the relevance for the global scientific community and/or (b) the wider implications for global scale problems, preferably combined with (c) having a significance beyond a single discipline. A clear focus on key processes associated with planetary scale change is strongly encouraged. Manuscripts can be submitted as either research contributions or as a review article. Every effort should be made towards the presentation of research outcomes in an understandable way for a broad readership.
期刊最新文献
Summer amplification of interannual variability changes in surface air temperature during the last interglacial period Local summer insolation modulated Southern Ocean productivity and Antarctic icesheet evolution since MIS 5 Editorial Board Early Cretaceous deep-water bedforms west of the Guinea Plateau revise the opening history of the Equatorial Atlantic Gateway Undervalued CO2 emissions from soil to the atmosphere in seismic areas: A case study in Tangshan, North China
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1