气候变化领域集成服务门户(CCPortal): Increasing ocean stratification over the past half-century

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DOI	10.1038/s41558-020-00918-2
	Increasing ocean stratification over the past half-century
	Li G.; Cheng L.; Zhu J.; Trenberth K.E.; Mann M.E.; Abraham J.P.
发表日期	2020
ISSN	1758-678X
英文摘要	Seawater generally forms stratified layers with lighter waters near the surface and denser waters at greater depth. This stable configuration acts as a barrier to water mixing that impacts the efficiency of vertical exchanges of heat, carbon, oxygen and other constituents. Previous quantification of stratification change has been limited to simple differencing of surface and 200-m depth changes and has neglected the spatial complexity of ocean density change. Here, we quantify changes in ocean stratification down to depths of 2,000 m using the squared buoyancy frequency N2 and newly available ocean temperature/salinity observations. We find that stratification globally has increased by a substantial 5.3% [5.0%, 5.8%] in recent decades (1960–2018) (the confidence interval is 5–95%); a rate of 0.90% per decade. Most of the increase (~71%) occurred in the upper 200 m of the ocean and resulted largely (>90%) from temperature changes, although salinity changes play an important role locally. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/142250
作者单位	International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; National Center for Atmospheric Research, Boulder, CO, United States; Department of Meteorology and Atmospheric Science, Department of Geosciences, and Earth and Environmental Systems Institute, Pennsylvania State University, State College, PA, United States; School of Engineering, University of St. Thomas, St Paul, MN, United States
推荐引用方式 GB/T 7714	Li G.,Cheng L.,Zhu J.,et al. Increasing ocean stratification over the past half-century[J],2020.
APA	Li G.,Cheng L.,Zhu J.,Trenberth K.E.,Mann M.E.,&Abraham J.P..(2020).Increasing ocean stratification over the past half-century.Nature Climate Change.
MLA	Li G.,et al."Increasing ocean stratification over the past half-century".Nature Climate Change (2020).