气候变化领域集成服务门户(CCPortal): The Turbulent Structure of the Azores Current System: A Statistical Analysis

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DOI	10.1029/2020JC016327
	The Turbulent Structure of the Azores Current System: A Statistical Analysis
	Silva-Fernandes S.M.; Peliz A.J.
发表日期	2020
ISSN	21699275
卷号	125 期号:11
英文摘要	Twenty-five years of satellite altimetry Sea Level Anomaly (SLA) and SLA-derived eddy trajectories are used for a thorough characterization of the Azores Current (AzC) eddies' kinematic properties (i.e., amplitude, radius, and swirl velocity) and evolution above the Mid Atlantic Ridge (MAR) and the Seewarte seamount chain (around 28°W). Changes in the mean flow kinetic energy and eddy kinetic energy (EKE) along the AzC main axis (around 34.2°N) allow to divide its zonal structure into three sectors: The western one, between the MAR and 28°W, the central, until 24°W and the eastern, between 24°W and 20°W. A clear intensification of the western sector is visible in both distribution maps, as well in the median, Skewness, and Kurtosis of the SLA field. Two main patterns of the SLA turbulent field also emerge from the statistical analysis: a meridional asymmetry around the current mean axis and a zonal one. The kinematic properties of the detected eddies clearly demonstrate that cyclones are more intense and non-linear than anticyclones, mainly in the western region, exhibiting higher values of EKE. High amplitude cyclones reported in several papers of the area (with a time-mean amplitude above 16 cm) are rarities, with only six cyclones detected in the 25 years of data. © 2020. American Geophysical Union. All Rights Reserved.
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/186601
作者单位	Instituto Dom Luiz—Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
推荐引用方式 GB/T 7714	Silva-Fernandes S.M.,Peliz A.J.. The Turbulent Structure of the Azores Current System: A Statistical Analysis[J],2020,125(11).
APA	Silva-Fernandes S.M.,&Peliz A.J..(2020).The Turbulent Structure of the Azores Current System: A Statistical Analysis.Journal of Geophysical Research: Oceans,125(11).
MLA	Silva-Fernandes S.M.,et al."The Turbulent Structure of the Azores Current System: A Statistical Analysis".Journal of Geophysical Research: Oceans 125.11(2020).