Variability of the nutrient stream near Kuroshio's origin

Abstract The Kuroshio—literally “the Black Stream”—is the most substantial current in the Pacific Ocean. It was called the Black Stream because this oligotrophic current is so nutrient-poor in its euphotic zone that the water appears black without the influence of phytoplankton and the associated, o...

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Autores principales:	Chen-Tung Arthur Chen, Ting-Hsuan Huang, Chi-Hsuan Wu, Haiyan Yang, Xinyu Guo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/89a200c57cf04c8ca4a6b82750743b05
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spelling	oai:doaj.org-article:89a200c57cf04c8ca4a6b82750743b052021-12-02T15:54:06ZVariability of the nutrient stream near Kuroshio's origin10.1038/s41598-021-84420-52045-2322https://doaj.org/article/89a200c57cf04c8ca4a6b82750743b052021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84420-5https://doaj.org/toc/2045-2322Abstract The Kuroshio—literally “the Black Stream”—is the most substantial current in the Pacific Ocean. It was called the Black Stream because this oligotrophic current is so nutrient-poor in its euphotic zone that the water appears black without the influence of phytoplankton and the associated, often colored dissolved organic matter. Yet, below the euphotic layer, nutrient concentrations increase with depth while current speed declines. Consequently, a core of maximum nutrient flux, the so-called nutrient stream, develops at a depth of roughly between 200 and 800 m. This poorly studied nutrient stream transports nutrients to and supports high productivity and fisheries on the East China Sea continental shelf; it also transports nutrients to and promotes increased productivity and fisheries in the Kuroshio Extension and the subarctic Pacific Ocean. Three modes of the Kuroshio nutrient stream are detected off SE Taiwan for the first time: one has a single-core; one has two cores that are apparently separated by the ridge at 120.6–122° E, and one has two cores that are separated by a southward flow above the ridge. More importantly, northward nutrient transports seem to have been increasing since 2015 as a result of a 30% increase in subsurface water transport, which began in 2013. Such a nutrient stream supports the Kuroshio's high productivity, such as on the East China Sea continental shelf and in the Kuroshio Extension SE of Japan.Chen-Tung Arthur ChenTing-Hsuan HuangChi-Hsuan WuHaiyan YangXinyu GuoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chen-Tung Arthur Chen Ting-Hsuan Huang Chi-Hsuan Wu Haiyan Yang Xinyu Guo Variability of the nutrient stream near Kuroshio's origin
description	Abstract The Kuroshio—literally “the Black Stream”—is the most substantial current in the Pacific Ocean. It was called the Black Stream because this oligotrophic current is so nutrient-poor in its euphotic zone that the water appears black without the influence of phytoplankton and the associated, often colored dissolved organic matter. Yet, below the euphotic layer, nutrient concentrations increase with depth while current speed declines. Consequently, a core of maximum nutrient flux, the so-called nutrient stream, develops at a depth of roughly between 200 and 800 m. This poorly studied nutrient stream transports nutrients to and supports high productivity and fisheries on the East China Sea continental shelf; it also transports nutrients to and promotes increased productivity and fisheries in the Kuroshio Extension and the subarctic Pacific Ocean. Three modes of the Kuroshio nutrient stream are detected off SE Taiwan for the first time: one has a single-core; one has two cores that are apparently separated by the ridge at 120.6–122° E, and one has two cores that are separated by a southward flow above the ridge. More importantly, northward nutrient transports seem to have been increasing since 2015 as a result of a 30% increase in subsurface water transport, which began in 2013. Such a nutrient stream supports the Kuroshio's high productivity, such as on the East China Sea continental shelf and in the Kuroshio Extension SE of Japan.
format	article
author	Chen-Tung Arthur Chen Ting-Hsuan Huang Chi-Hsuan Wu Haiyan Yang Xinyu Guo
author_facet	Chen-Tung Arthur Chen Ting-Hsuan Huang Chi-Hsuan Wu Haiyan Yang Xinyu Guo
author_sort	Chen-Tung Arthur Chen
title	Variability of the nutrient stream near Kuroshio's origin
title_short	Variability of the nutrient stream near Kuroshio's origin
title_full	Variability of the nutrient stream near Kuroshio's origin
title_fullStr	Variability of the nutrient stream near Kuroshio's origin
title_full_unstemmed	Variability of the nutrient stream near Kuroshio's origin
title_sort	variability of the nutrient stream near kuroshio's origin
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/89a200c57cf04c8ca4a6b82750743b05
work_keys_str_mv	AT chentungarthurchen variabilityofthenutrientstreamnearkuroshiosorigin AT tinghsuanhuang variabilityofthenutrientstreamnearkuroshiosorigin AT chihsuanwu variabilityofthenutrientstreamnearkuroshiosorigin AT haiyanyang variabilityofthenutrientstreamnearkuroshiosorigin AT xinyuguo variabilityofthenutrientstreamnearkuroshiosorigin
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Variability of the nutrient stream near Kuroshio's origin

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