Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations

In this work we use satellite altimeter observations to study the mechanism of decadal variability of the Kuroshio Extension (KE), with special attention on jet-eddy energy transfer, and on the relationship between the wind-driven sea surface height anomalies (SSHAs) and those directly driven by int...

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Autores principales:	Guidi Zhou, Zhuhua Li, Xuhua Cheng
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Kuroshio Extension mesoscale eddy Rossby wave wind stress forcing decadal variability Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/d3cd0554b42e422d9fbf1b8bf2f9b30d
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spelling	oai:doaj.org-article:d3cd0554b42e422d9fbf1b8bf2f9b30d2021-11-22T06:35:27ZIntrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations2296-774510.3389/fmars.2021.766226https://doaj.org/article/d3cd0554b42e422d9fbf1b8bf2f9b30d2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.766226/fullhttps://doaj.org/toc/2296-7745In this work we use satellite altimeter observations to study the mechanism of decadal variability of the Kuroshio Extension (KE), with special attention on jet-eddy energy transfer, and on the relationship between the wind-driven sea surface height anomalies (SSHAs) and those directly driven by intrinsic oceanic processes including jet and eddies. It is shown that energy feedback between the jet and mesoscale eddies can maintain the decadal oscillation of the KE. The wind-driven SSHAs are broad-scale and very weak compared to the intrinsic variability. Physically they can potentially trigger delayed responses of the latter by modulating vorticity advection from upstream but the statistical significance is low. KE perturbations resulting from the intrinsic variability, on the other hand, could feedback onto the wind-driven SSHAs by inducing anomalous basin-scale wind stress. The KE jet is thus an integrated system involving the jet and the eddies, possibly feeding back to, and paced by, wind stress anomalies.Guidi ZhouGuidi ZhouZhuhua LiZhuhua LiXuhua ChengXuhua ChengFrontiers Media S.A.articleKuroshio Extensionmesoscale eddyRossby wavewind stress forcingdecadal variabilityScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Kuroshio Extension mesoscale eddy Rossby wave wind stress forcing decadal variability Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	Kuroshio Extension mesoscale eddy Rossby wave wind stress forcing decadal variability Science Q General. Including nature conservation, geographical distribution QH1-199.5 Guidi Zhou Guidi Zhou Zhuhua Li Zhuhua Li Xuhua Cheng Xuhua Cheng Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations
description	In this work we use satellite altimeter observations to study the mechanism of decadal variability of the Kuroshio Extension (KE), with special attention on jet-eddy energy transfer, and on the relationship between the wind-driven sea surface height anomalies (SSHAs) and those directly driven by intrinsic oceanic processes including jet and eddies. It is shown that energy feedback between the jet and mesoscale eddies can maintain the decadal oscillation of the KE. The wind-driven SSHAs are broad-scale and very weak compared to the intrinsic variability. Physically they can potentially trigger delayed responses of the latter by modulating vorticity advection from upstream but the statistical significance is low. KE perturbations resulting from the intrinsic variability, on the other hand, could feedback onto the wind-driven SSHAs by inducing anomalous basin-scale wind stress. The KE jet is thus an integrated system involving the jet and the eddies, possibly feeding back to, and paced by, wind stress anomalies.
format	article
author	Guidi Zhou Guidi Zhou Zhuhua Li Zhuhua Li Xuhua Cheng Xuhua Cheng
author_facet	Guidi Zhou Guidi Zhou Zhuhua Li Zhuhua Li Xuhua Cheng Xuhua Cheng
author_sort	Guidi Zhou
title	Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations
title_short	Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations
title_full	Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations
title_fullStr	Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations
title_full_unstemmed	Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations
title_sort	intrinsic and wind-driven decadal variability of the kuroshio extension in altimeter observations
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/d3cd0554b42e422d9fbf1b8bf2f9b30d
work_keys_str_mv	AT guidizhou intrinsicandwinddrivendecadalvariabilityofthekuroshioextensioninaltimeterobservations AT guidizhou intrinsicandwinddrivendecadalvariabilityofthekuroshioextensioninaltimeterobservations AT zhuhuali intrinsicandwinddrivendecadalvariabilityofthekuroshioextensioninaltimeterobservations AT zhuhuali intrinsicandwinddrivendecadalvariabilityofthekuroshioextensioninaltimeterobservations AT xuhuacheng intrinsicandwinddrivendecadalvariabilityofthekuroshioextensioninaltimeterobservations AT xuhuacheng intrinsicandwinddrivendecadalvariabilityofthekuroshioextensioninaltimeterobservations
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Intrinsic and Wind-Driven Decadal Variability of the Kuroshio Extension in Altimeter Observations

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