气候变化领域集成服务门户(CCPortal): Physical and Biogeochemical Drivers of Alongshore pH and Oxygen Variability in the California Current System

CCPortal

DOI	10.1029/2020GL089553
	Physical and Biogeochemical Drivers of Alongshore pH and Oxygen Variability in the California Current System
	Cheresh J.; Fiechter J.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:19
英文摘要	In the California Current System (CCS), the nearshore environment experiences natural exposure to low pH and reduced oxygen in response to coastal upwelling. Anthropogenic impacts further decrease pH and oxygen below biological thresholds, making the CCS particularly vulnerable to ocean acidification and hypoxia. Results from a coupled physical-biogeochemical model reveal a strongly heterogeneous alongshore pattern of nearshore pH and oxygen in the central CCS, both in their long-term means and trends. This spatial structuring is explained by an interplay between alongshore variability in local upwelling intensity and subsequent primary production, modulated by nearshore advection and regional geostrophic currents. The model solution suggests that the progression of ocean acidification and hypoxia will not be spatially homogeneous, thereby highlighting the need to consider subregional processes when assessing natural and anthropogenic impacts on coastal ecosystems in eastern boundary current upwelling regions. ©2020. The Authors.
英文关键词	Acidification; Biogeochemistry; Ecosystems; Ocean currents; Oxygen; Anthropogenic impacts; Biogeochemical modeling; Biological thresholds; California current systems; Eastern boundary current; Geostrophic currents; Ocean acidifications; Spatially homogeneous; Coastal engineering; advection; anthropogenic effect; biogeochemistry; eastern boundary current; hypoxic conditions; long-term change; nearshore environment; ocean acidification; oxygen; pH; physical analysis; primary production; upwelling; California Current; Pacific Ocean
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/169657
作者单位	Ocean Sciences Department, University of California, Santa Cruz, CA, United States
推荐引用方式 GB/T 7714	Cheresh J.,Fiechter J.. Physical and Biogeochemical Drivers of Alongshore pH and Oxygen Variability in the California Current System[J],2020,47(19).
APA	Cheresh J.,&Fiechter J..(2020).Physical and Biogeochemical Drivers of Alongshore pH and Oxygen Variability in the California Current System.Geophysical Research Letters,47(19).
MLA	Cheresh J.,et al."Physical and Biogeochemical Drivers of Alongshore pH and Oxygen Variability in the California Current System".Geophysical Research Letters 47.19(2020).