气候变化领域集成服务门户(CCPortal): Kinetic Energy of Eddy-Like Features From Sea Surface Altimetry

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DOI	10.1029/2019MS001769
	Kinetic Energy of Eddy-Like Features From Sea Surface Altimetry
	Martínez-Moreno J.; Hogg A.M.; Kiss A.E.; Constantinou N.C.; Morrison A.K.
发表日期	2019
ISSN	19422466
起始页码	3090
结束页码	3105
卷号	11 期号:10
英文摘要	The mesoscale eddy field plays a key role in the mixing and transport of physical and biological properties and redistribution of energy in the ocean. Eddy kinetic energy is commonly defined as the kinetic energy of the time-varying component of the velocity field. However, this definition contains all processes that vary in time, including coherent mesoscale eddies, jets, waves, and large-scale motions. The focus of this paper is on the eddy kinetic energy contained in coherent mesoscale eddies. We present a new method to decompose eddy kinetic energy into oceanic processes. The proposed method uses a new eddy identification algorithm (TrackEddy). This algorithm is based on the premise that the sea level signature of a coherent eddy can be approximated as a Gaussian feature. The eddy Gaussian signature then allows for the calculation of kinetic energy of the eddy field through the geostrophic approximation. TrackEddy has been validated using synthetic sea surface height data and then used to investigate trends of eddy kinetic energy in the Southern Ocean using satellite sea surface height anomaly (AVISO+). We detect an increasing trend of eddy kinetic energy associated with mesoscale eddies in the Southern Ocean. This trend is correlated with an increase in the coherent eddy amplitude and the strengthening of wind stress over the last two decades. ©2019. The Authors.
英文关键词	coherent eddies; eddy tracking; kinetic energy
语种	英语
scopus关键词	Kinetic energy; Sea level; Surface waters; Velocity; Biological properties; coherent eddies; Eddy identification algorithms; Eddy tracking; Geostrophic approximation; Mesoscale eddy fields; Sea-surface height anomalies; Time-varying components; Kinetics; algorithm; eddy; Gaussian method; kinetic energy; mesoscale eddy; sea surface height; wind stress; Southern Ocean
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156854
作者单位	Research School of Earth Science and ARC Center of Excellence for Climate Extremes, Australian National University, Canberra, ACT, Australia
推荐引用方式 GB/T 7714	Martínez-Moreno J.,Hogg A.M.,Kiss A.E.,et al. Kinetic Energy of Eddy-Like Features From Sea Surface Altimetry[J],2019,11(10).
APA	Martínez-Moreno J.,Hogg A.M.,Kiss A.E.,Constantinou N.C.,&Morrison A.K..(2019).Kinetic Energy of Eddy-Like Features From Sea Surface Altimetry.Journal of Advances in Modeling Earth Systems,11(10).
MLA	Martínez-Moreno J.,et al."Kinetic Energy of Eddy-Like Features From Sea Surface Altimetry".Journal of Advances in Modeling Earth Systems 11.10(2019).