气候变化领域集成服务门户(CCPortal): Internal Variability Dominates Over Externally Forced Ocean Circulation Changes Seen Through CFCs

CCPortal

DOI	10.1029/2020GL087585
	Internal Variability Dominates Over Externally Forced Ocean Circulation Changes Seen Through CFCs
	Lester J.G.; Lovenduski N.S.; Graven H.D.; Long M.C.; Lindsay K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:9
英文摘要	Observations of oceanic transient tracers have indicated that the circulation in the Southern Ocean has changed in recent decades, potentially driven by changes in external climate forcing. Here, we use the CESM Large Ensemble to analyze changes in two oceanic tracers that are affected by ocean circulation: the partial pressure of chlorofluorocarbon-12 (pCFC12) and the idealized model tracer Ideal Age (IAGE) over the 1991 to 2005 period. The small ensemble mean change in IAGE suggests that there has been very little externally forced change in Southern Ocean circulation over this period, in contrast to strong internal variability. Further, our analysis implies that real-world observations of changes in pCFC12 may not be a robust way to characterize externally driven changes in Southern Ocean circulation because of the large internal variability in pCFC12 changes exhibited by the individual ensemble members. ©2020. The Authors.
英文关键词	Chlorofluorocarbons; Tracers; Climate forcings; Ensemble members; Idealized models; Internal variability; Ocean circulation; Real-world; Southern ocean; Transient tracers; Oceanography; CFC; climate change; climate forcing; observational method; oceanic circulation; partial pressure; tracer; Southern 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/170393
作者单位	Department of Physics and Grantham Institute, Imperial College London, London, United Kingdom; Department of Atmospheric and Oceanic Sciences and Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder, CO, United States; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Lester J.G.,Lovenduski N.S.,Graven H.D.,et al. Internal Variability Dominates Over Externally Forced Ocean Circulation Changes Seen Through CFCs[J],2020,47(9).
APA	Lester J.G.,Lovenduski N.S.,Graven H.D.,Long M.C.,&Lindsay K..(2020).Internal Variability Dominates Over Externally Forced Ocean Circulation Changes Seen Through CFCs.Geophysical Research Letters,47(9).
MLA	Lester J.G.,et al."Internal Variability Dominates Over Externally Forced Ocean Circulation Changes Seen Through CFCs".Geophysical Research Letters 47.9(2020).