气候变化领域集成服务门户(CCPortal): Contribution of ocean physics and dynamics at different scales to heat uptake in low-resolution aogcms

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DOI	10.1175/JCLI-D-20-0652.1
	Contribution of ocean physics and dynamics at different scales to heat uptake in low-resolution aogcms
	SAENKO O.A.; GREGORY J.M.; GRIFFIES S.M.; COULDREY M.P.; DIAS F.B.
发表日期	2021
ISSN	08948755
起始页码	2017
结束页码	2035
卷号	34 期号:6
英文摘要	Using an ensemble of atmosphere-ocean general circulation models (AOGCMs) in an idealized climate change experiment, this study quantifies the contributions to ocean heat uptake (OHU) from ocean physical parameterizations and resolved dynamical processes operating at different scales. Analysis of heat budget diagnostics reveals a leadingorder global heat balance in the subsurface upper ocean in a steady state between the large-scale circulation warming it and mesoscale processes cooling it, and shows that there are positive contributions from processes on all scales to the subsurface OHU during climate change. There is better agreement among the AOGCMs in the net OHUthan in the individual scales/ processes contributing to it. In the upper ocean and at high latitudes,OHUis dominated by small-scale diapycnal processes. Below 400 m,OHUis dominated by the superresidual transport, representing large-scale ocean dynamics combined with all parameterized mesoscale and submesoscale eddy effects. Weakening of the AMOC leads to less heat convergence in the subpolar NorthAtlantic and less heat divergence at lower latitudes, with a small overall effect on the netAtlantic heat content. At low latitudes, the dominance of advective heat redistribution is contrary to the diffusive OHU mechanism assumed by the commonly used upwelling-diffusion model. Using a density water-mass framework, it is found that most of the OHU occurs along isopycnal directions. This feature ofOHUis used to accurately reconstruct the global vertical oceanwarming profile from the surface heat flux anomalies, supporting advective (rather than diffusive) models of OHU and sea level rise. © 2021 American Meteorological Society. All rights reserved.
英文关键词	Climate change; Heat budgets/fluxes; Isopycnal mixing; Ocean dynamics
语种	英语
scopus关键词	Climate models; Heat flux; Sea level; Atmosphere ocean general circulation models; Diffusion model; Dynamical process; Large-scale circulation; Mesoscale process; Ocean heat uptake; Sub-mesoscale eddies; Surface heat fluxes; Climate change; climate change; ensemble forecasting; heat flux; isopycnal layer; mixing; oceanic circulation; Atlantic Ocean; Atlantic Ocean (North)
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178679
作者单位	ECCC, Canadian Centre for Climate Modelling and Analysis, Victoria, BC, Canada; NCAS, University of Reading, Reading, United Kingdom; Met Office Hadley Centre, Exeter, United Kingdom; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Princeton University Atmospheric and Oceanic Sciences Program, Princeton, NJ, United States; INAR, University of Helsinki, Helsinki, Finland
推荐引用方式 GB/T 7714	SAENKO O.A.,GREGORY J.M.,GRIFFIES S.M.,et al. Contribution of ocean physics and dynamics at different scales to heat uptake in low-resolution aogcms[J],2021,34(6).
APA	SAENKO O.A.,GREGORY J.M.,GRIFFIES S.M.,COULDREY M.P.,&DIAS F.B..(2021).Contribution of ocean physics and dynamics at different scales to heat uptake in low-resolution aogcms.Journal of Climate,34(6).
MLA	SAENKO O.A.,et al."Contribution of ocean physics and dynamics at different scales to heat uptake in low-resolution aogcms".Journal of Climate 34.6(2021).