气候变化领域集成服务门户(CCPortal): Impact of ocean-atmosphere current feedback on ocean mesoscale activity: Regional variations and sensitivity to model resolution

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DOI	10.1175/JCLI-D-19-0484.1
	Impact of ocean-atmosphere current feedback on ocean mesoscale activity: Regional variations and sensitivity to model resolution
	Jullien S.; Masson S.; Oerder V.; Samson G.; Colas F.; Renault L.
发表日期	2020
ISSN	0894-8755
起始页码	2585
结束页码	2602
卷号	33 期号:7
英文摘要	Ocean mesoscale eddies are characterized by rotating-like and meandering currents that imprint the low-level atmosphere. Such a current feedback (CFB) has been shown to induce a sink of energy from the ocean to the atmosphere, and consequently to damp the eddy kinetic energy (EKE), with an apparent regional disparity. In a context of increasing model resolution, the importance of this feedback and its dependence on oceanic and atmospheric model resolution arise. Using a hierarchy of quasi-global coupled models with spatial resolutions varying from 1/48 to 1/128, the present study shows that the CFB induces a negative wind work at scales ranging from 100 to 1000 km, and a subsequent damping of the mesoscale activity by; 30% on average, independently of the model resolution. Regional variations of this damping range from; 20% in very rich eddying regions to; 40% in poor eddying regions. This regional modulation is associated with a different balance between the sink of energy by eddy wind work and the source of EKE by ocean intrinsic instabilities. The efficiency of the CFB is also shown to be a function of the surface wind magnitude: the larger the wind, the larger the sink of energy. The CFB impact is thus related to both wind and EKE. Its correct representation requires both an ocean model that resolves the mesoscale field adequately and an atmospheric model resolution that matches the ocean effective resolution and allows a realistic representation of wind patterns. These results are crucial for including adequately mesoscale ocean-atmosphere interactions in coupled general circulation models and have strong implications in climate research. © 2020 American Meteorological Society.
英文关键词	Damping; Feedback; Kinetic energy; Kinetics; Ocean currents; Sensitivity analysis; Coupled general circulation models; Eddy kinetic energy; Effective resolutions; Global coupled model; Intrinsic instability; Mesoscale activity; Ocean-atmosphere interactions; Regional disparities; Climate models; air-sea interaction; atmosphere-ocean coupling; atmospheric modeling; climate feedback; climate modeling; kinetic energy; marine atmosphere; mesoscale eddy; mesoscale motion; spatial resolution
语种	英语
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/171376
作者单位	Ifremer, Univ. Brest, CNRS, IRD, Laboratoire d'Oceanographie Physique et Spatiale, IUEM, Brest, France; LOCEAN-IPSL, Sorbonne Université, CNRS-IRD-MNHN, Paris, France; Escuela de Ciencias del Mar, Pontificia Universidad Católica de Valparaíso, Valparaiso, Instituto Milenio de Oceanografía, Concepción, Chile; Mercator Ocean, Ramonville-Saint-Agne, France; University of Toulouse, IRD, CNRS, CNES, UPS, LEGOS, Toulouse, France; Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Jullien S.,Masson S.,Oerder V.,et al. Impact of ocean-atmosphere current feedback on ocean mesoscale activity: Regional variations and sensitivity to model resolution[J],2020,33(7).
APA	Jullien S.,Masson S.,Oerder V.,Samson G.,Colas F.,&Renault L..(2020).Impact of ocean-atmosphere current feedback on ocean mesoscale activity: Regional variations and sensitivity to model resolution.Journal of Climate,33(7).
MLA	Jullien S.,et al."Impact of ocean-atmosphere current feedback on ocean mesoscale activity: Regional variations and sensitivity to model resolution".Journal of Climate 33.7(2020).