气候变化领域集成服务门户(CCPortal): Changes in Deep-Sea Oxygenation in the Northeast Pacific Ocean During 32

CCPortal

DOI	10.1029/2019GL086613
	Changes in Deep-Sea Oxygenation in the Northeast Pacific Ocean During 32–10 ka
	Saravanan P.; Gupta A.K.; Zheng H.; Rai S.K.; Panigrahi M.K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	Climatic variations in the northeastern (NE) Pacific Ocean have been related to the strength of intermediate water-driven productivity and global ocean circulation. Productivity variations and ocean circulation during the late Quaternary may have caused changes in the intensity of the oxygen minimum zone (OMZ). To understand these changes in productivity and resultant OMZ fluctuations, we analyzed benthic foraminiferal assemblages from the Cascadia margin which reveal major faunal and ecological shifts associated with the millennial-scale climate changes during ~32–10 ka. The intermediate waters were highly variable during ~20–14 ka with increased productivity and nutrient supply to the subsurface during circa 15.5–14.5 ka. Our results suggest that suboxic environmental conditions occurred during the warm interstadials, and the Bølling-Ållerød event was favorable for the dysoxic species. Our results further indicate that paleoclimate variations in the northeast Pacific region were mainly driven by the Pacific Intermediate Water Current. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Climate change; Productivity; Climatic variation; Environmental conditions; Foraminiferal assemblages; Global ocean circulation; Increased productivity; Intermediate waters; Oxygen minimum zone; Pacific intermediate water; Oceanography; Allerod; benthic foraminifera; Bolling; climate variation; deep sea; environmental conditions; global ocean; oceanic circulation; oxygen minimum layer; paleoclimate; Quaternary; Pacific Ocean; Pacific Ocean (Northeast)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170318
作者单位	Yunnan Key Laboratory of Earth System Science, Yunnan University, Kunming, China; Department of Geology and Geophysics, Indian Institute of Technology Kharagpur, Kharagpur, India; School of Earth and Environmental Sciences, University of Queensland, Brisbane, QLD, Australia; Wadia Institute of Himalayan Geology, Dehradun, India
推荐引用方式 GB/T 7714	Saravanan P.,Gupta A.K.,Zheng H.,等. Changes in Deep-Sea Oxygenation in the Northeast Pacific Ocean During 32–10 ka[J],2020,47(11).
APA	Saravanan P.,Gupta A.K.,Zheng H.,Rai S.K.,&Panigrahi M.K..(2020).Changes in Deep-Sea Oxygenation in the Northeast Pacific Ocean During 32–10 ka.Geophysical Research Letters,47(11).
MLA	Saravanan P.,et al."Changes in Deep-Sea Oxygenation in the Northeast Pacific Ocean During 32–10 ka".Geophysical Research Letters 47.11(2020).