气候变化领域集成服务门户(CCPortal): High-Frequency Submesoscale Motions Enhance the Upward Vertical Heat Transport in the Global Ocean

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DOI	10.1029/2020JC016544
	High-Frequency Submesoscale Motions Enhance the Upward Vertical Heat Transport in the Global Ocean
	Su Z.; Torres H.; Klein P.; Thompson A.F.; Siegelman L.; Wang J.; Menemenlis D.; Hill C.
发表日期	2020
ISSN	21699275
卷号	125 期号:9
英文摘要	The rate of ocean heat uptake depends on the mechanisms that transport heat between the surface and the ocean interior. A recent study found that the vertical heat transport driven by motions with scales smaller than 0.5° (submesoscales) and frequencies smaller than 1 day−1 is upward. This transport competes with the other major components of the global heat transport, namely, the downward heat transport explained by the large-scale wind-driven vertical circulation and vertical diffusion at small scales and the upward heat transport associated with mesoscale eddies (50- to 300-km size). The contribution from motions with small spatial scales (<0.5°) and frequencies larger than 1 day−1, including internal gravity waves, has never been explicitly estimated. This study investigates this high-frequency (subdaily) submesoscale contribution to the global heat transport. The major result of this study, based on the analysis of a high-resolution ocean model, is that including this high-frequency contribution surprisingly doubles the upward heat transport due to submesoscales in winter in the global ocean. This contribution typically concerns depths down to 200–500 m and can have a magnitude of up to 500 W m−2 in terms of wintertime heat fluxes at 40-m depth, which causes a significant upward heat transport of ~7 PW when integrated over the global ocean. Thus, such submesoscale heat transport, which is not resolved by climate models, impacts the heat uptake in the global ocean. The mechanisms involved in these results still need to be understood, which should be the scope of future work. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	eddies; eddy transport; high frequency; ocean front; ocean heat transport
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186673
作者单位	Department of Physics, University of Toronto, Toronto, ON, Canada; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; IFREMER, CNRS, Paris, France; Environmental Science and Engineering, California Institute of Technology, Pasadena, CA, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Su Z.,Torres H.,Klein P.,et al. High-Frequency Submesoscale Motions Enhance the Upward Vertical Heat Transport in the Global Ocean[J],2020,125(9).
APA	Su Z..,Torres H..,Klein P..,Thompson A.F..,Siegelman L..,...&Hill C..(2020).High-Frequency Submesoscale Motions Enhance the Upward Vertical Heat Transport in the Global Ocean.Journal of Geophysical Research: Oceans,125(9).
MLA	Su Z.,et al."High-Frequency Submesoscale Motions Enhance the Upward Vertical Heat Transport in the Global Ocean".Journal of Geophysical Research: Oceans 125.9(2020).