globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.03.036
Scopus记录号: 2-s2.0-85044468994
论文题名:
Reduced oxygenation at intermediate depths of the southwest Pacific during the last glacial maximum
作者: Durand A.; Chase Z.; Noble T.L.; Bostock H.; Jaccard S.L.; Townsend A.T.; Bindoff N.L.; Neil H.; Jacobsen G.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 491
起始页码: 48
结束页码: 57
语种: 英语
英文关键词: Antarctic Intermediate Water ; circulation changes ; New Zealand ; oceanic deoxygenation ; redox sensitive elements ; ventilation
Scopus关键词: Oxygen ; Oxygenation ; Uranium ; Ventilation ; Antarctic intermediate waters ; Circulation changes ; Deoxygenations ; New zealand ; Redox sensitives ; Glacial geology ; Antarctic Intermediate Water ; core analysis ; Holocene ; Last Glacial Maximum ; mode water ; oxygenation ; paleoceanography ; redox conditions ; ventilation ; Campbell Plateau ; Challenger Plateau ; Pacific Ocean ; Pacific Ocean (Southwest) ; Tasman Sea
英文摘要: To investigate changes in oxygenation at intermediate depths in the southwest Pacific between the Last Glacial Maximum (LGM) and the Holocene, redox sensitive elements uranium and rhenium were measured in 12 sediment cores located on the Campbell and Challenger plateaux offshore from New Zealand. The core sites are currently bathed by Subantarctic Mode Water (SAMW), Antarctic Intermediate Water (AAIW) and Upper Circumpolar Deep Water (UCDW). The sedimentary distributions of authigenic uranium and rhenium reveal reduced oxygen content at intermediate depths (800–1500 m) during the LGM compared to the Holocene. In contrast, data from deeper waters (≥1500 m) indicate higher oxygen content during the LGM compared to the Holocene. These data, together with variations in benthic foraminiferal δ13C, are consistent with a shallower AAIW–UCDW boundary over the Campbell Plateau during the LGM. Whilst AAIW continued to bathe the intermediate depths (≤1500 m) of the Challenger Plateau during the LGM, the data suggest that the AAIW at these core sites contained less oxygen compared to the Holocene. These results are at odds with the general notion that AAIW was better oxygenated and expanded deeper during the LGM due to stronger westerlies and colder temperatures. These findings may be explained by an important change in AAIW formation and circulation. © 2018
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109913
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

Files in This Item:

There are no files associated with this item.


作者单位: Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia; National Institute of Water and Atmospheric Research, Wellington, New Zealand; Institute of Geological Sciences, Oeschger Centre for Climate Change Research, University of Bern, Switzerland; Central Science Laboratory, University of Tasmania, Hobart, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart, Tasmania, Australia; Commonwealth Scientific and Industrial Research Organisation, Marine Atmospheric Research, Hobart, Tasmania, Australia; Collaboration for Australian Weather and Climate Research, Melbourne, Victoria, Australia; Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales, Australia; Australian Research Council Centre of Excellence for Climate System Science, Sydney, New South Wales, Australia

Recommended Citation:
Durand A.,Chase Z.,Noble T.L.,et al. Reduced oxygenation at intermediate depths of the southwest Pacific during the last glacial maximum[J]. Earth and Planetary Science Letters,2018-01-01,491
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Durand A.]'s Articles
[Chase Z.]'s Articles
[Noble T.L.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Durand A.]'s Articles
[Chase Z.]'s Articles
[Noble T.L.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Durand A.]‘s Articles
[Chase Z.]‘s Articles
[Noble T.L.]‘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.