Deglacial biogenic opal peaks revealing enhanced Southern Ocean upwelling during the last 513 ka

doi:10.1016/j.quaint.2016.09.020

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋地质与地球物理研究室

	Deglacial biogenic opal peaks revealing enhanced Southern Ocean upwelling during the last 513 ka
	Tang, Zheng 1,3; Shi, Xuefa 1,3; Zhang, Xu 2; Chen, Zhihua 1,3; Chen, Min-Te 3,4; Wang, Xiangqin 1; Wang, Haozhuang 1; Liu, Helin 1; Lohmann, Gerrit 2; Li, Peiying 1,3
刊名	QUATERNARY INTERNATIONAL
	2016-12-15
卷号	425 页码:445-452
关键词	Southern ocean Ventilation Biogenic opal peaks Glacial termination
ISSN号	1040-6182
DOI	10.1016/j.quaint.2016.09.020
英文摘要	Strength of Southern Ocean upwelling controls the exchange of carbon dioxide (CO2) between deep ocean reservoirs and atmosphere, as well as the communication of dissolved silicon with the euphotic zone of the Southern Ocean. The silicon supply could limit diatom opal productivity in the high-latitudes of Southern Ocean and the subsequent burial of biogenic opal in underlying sediments. Here we report a record of biogenic opal export off the Prydz Bay south of the polar front of the Southern Ocean, indicating strengthened upwelling during the past five glacial terminations. In all five terminations (I-V), opal peaks occur in line with Northern Hemisphere summer insolation intensity as well as the existing IRDs, indicating that freshwater injection associated with retreat of the Northern Hemisphere ice sheets could be the cause of enhanced upwelling in the Southern Ocean during terminations. This could in turn promote CO2 outgassing, finally accelerating the completion of the terminations. In addition, the enhanced upwelling could export the Si-rich deep water to low latitudes via Antarctic Intermediate Water (AAIW) and Subantarctic Mode Water (SAMW), potentially leading to deglacial opal peaks in subtropical North Atlantic. (C) 2016 Elsevier Ltd and INQUA. All rights reserved.
资助项目	National Programme on Global Change and Air-Sea Interaction[GASI-GEOGE-06-02]
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000390534700031
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3293]
专题	业务部门_海洋地质与地球物理研究室
作者单位	1.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Peoples R China; 2.Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, D-27570 Bremerhaven, Germany; 3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China; 4.Taiwan Ocean Univ, Inst Appl Geosci, Keelung 20224, Peoples R China
推荐引用方式 GB/T 7714	Tang, Zheng,Shi, Xuefa,Zhang, Xu,et al. Deglacial biogenic opal peaks revealing enhanced Southern Ocean upwelling during the last 513 ka[J]. QUATERNARY INTERNATIONAL,2016,425:445-452.
APA	Tang, Zheng.,Shi, Xuefa.,Zhang, Xu.,Chen, Zhihua.,Chen, Min-Te.,...&Huang, Yuanhui.(2016).Deglacial biogenic opal peaks revealing enhanced Southern Ocean upwelling during the last 513 ka.QUATERNARY INTERNATIONAL,425,445-452.
MLA	Tang, Zheng,et al."Deglacial biogenic opal peaks revealing enhanced Southern Ocean upwelling during the last 513 ka".QUATERNARY INTERNATIONAL 425(2016):445-452.