气候变化领域集成服务门户(CCPortal): Control of transient climate response and associated sea level rise by deep-ocean mixing

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DOI	10.1088/1748-9326/ab8ca7
	Control of transient climate response and associated sea level rise by deep-ocean mixing
	Watanabe M.; Tatebe H.; Suzuki T.; Tachiiri K.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	To evaluate uncertainty in the transient climate response (TCR) associated with microscale deep-ocean mixing processes induced by internal tidal wave breaking, a set of idealized climate model experiments with two different implementations of deep-ocean mixing is conducted under increasing atmospheric CO2 concentration 1% per year. The difference in TCR between the two experiments is 0.16 C, which is about half as large as the multimodel spread of TCR in the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. The TCR difference can be attributed to the difference in the preindustrial climatological state. In the case where deep-ocean mixing works to enhance ocean stratification in the Pacific intermediate-to-deep layers, because the Pacific water mass is transported to the Southern Ocean by the Pacific meridional overturning circulation, the subsurface stratification in the Southern Ocean is also enhanced and deep wintertime convection there is suppressed. Our study shows that in this case during CO2 increase, ocean heat uptake from the atmosphere to deeper layers is suppressed and TCR is estimated to be higher than the other case. Diminished accumulation of oceanic heat in the deep layer also leads to the sea level depression of ∼0.4 m in the Southern Ocean when atmospheric CO2 concentration has quadrupled. Together with convective and cloud-radiative processes in the atmosphere and oceanic mesoscale processes, microscale deep-ocean mixing can be one of the major candidates in explaining uncertainty in future climate projections. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	ocean heat uptake; sea level rise; transient climate response; turbulent mixing; vertical diffusivity
语种	英语
scopus关键词	Carbon dioxide; Climate change; Electric reactors; Mixing; Sea level; Transient analysis; CO2 concentration; Future climate projections; Intergovernmental panel on climate changes; Internal tidal waves; Ocean heat uptake; Ocean stratification; Pacific meridional overturning circulation; Radiative process; Climate models
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153702
作者单位	Research Center for Environmental Modeling and Application, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25, Showa-machi, Kanazawa-ku, Kanagawa, Yokohama, 236-0001, Japan
推荐引用方式 GB/T 7714	Watanabe M.,Tatebe H.,Suzuki T.,et al. Control of transient climate response and associated sea level rise by deep-ocean mixing[J],2020,15(9).
APA	Watanabe M.,Tatebe H.,Suzuki T.,&Tachiiri K..(2020).Control of transient climate response and associated sea level rise by deep-ocean mixing.Environmental Research Letters,15(9).
MLA	Watanabe M.,et al."Control of transient climate response and associated sea level rise by deep-ocean mixing".Environmental Research Letters 15.9(2020).