Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific

Abstract The western subarctic Pacific exhibits major biological productivity fed by the Oyashio Current and its two source waters: Western Subarctic Water, which supplies nutrients from the subarctic Pacific, and cold Okhotsk Sea Intermediate Water (OSIW), which supplies iron from the Sea of Okhots...

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Autores principales:	Vigan Mensah, Kay. I. Ohshima
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/df51575c0cc242eea1adfa9f8a697062
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spelling	oai:doaj.org-article:df51575c0cc242eea1adfa9f8a6970622021-12-02T18:30:45ZWeakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific10.1038/s41598-021-93901-62045-2322https://doaj.org/article/df51575c0cc242eea1adfa9f8a6970622021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93901-6https://doaj.org/toc/2045-2322Abstract The western subarctic Pacific exhibits major biological productivity fed by the Oyashio Current and its two source waters: Western Subarctic Water, which supplies nutrients from the subarctic Pacific, and cold Okhotsk Sea Intermediate Water (OSIW), which supplies iron from the Sea of Okhotsk. We created seasonal climatologies of water properties to understand how the long-term trend (~ 50 years) and 18.6-year tidal cycle affect the Oyashio Intermediate Water (OYW). We found that over the trend, decreased OSIW outflow due to weakening of North Pacific overturning modifies OYW in winter. Meanwhile, OSIW outflow increases (decreases) in strong (weak) tide years. We predict that the opposite effects of the trend and strong tide will lead to stagnation of OYW properties until the mid-2020s, followed by accelerated warming until the mid-2030s (weak tide). A predicted 1 °C increase in OYW temperature and 50% decrease in OSIW content between 1960 and 2040 potentially have significant impact on biological productivity and carbon drawdown in the North Pacific.Vigan MensahKay. I. OhshimaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Vigan Mensah Kay. I. Ohshima Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific
description	Abstract The western subarctic Pacific exhibits major biological productivity fed by the Oyashio Current and its two source waters: Western Subarctic Water, which supplies nutrients from the subarctic Pacific, and cold Okhotsk Sea Intermediate Water (OSIW), which supplies iron from the Sea of Okhotsk. We created seasonal climatologies of water properties to understand how the long-term trend (~ 50 years) and 18.6-year tidal cycle affect the Oyashio Intermediate Water (OYW). We found that over the trend, decreased OSIW outflow due to weakening of North Pacific overturning modifies OYW in winter. Meanwhile, OSIW outflow increases (decreases) in strong (weak) tide years. We predict that the opposite effects of the trend and strong tide will lead to stagnation of OYW properties until the mid-2020s, followed by accelerated warming until the mid-2030s (weak tide). A predicted 1 °C increase in OYW temperature and 50% decrease in OSIW content between 1960 and 2040 potentially have significant impact on biological productivity and carbon drawdown in the North Pacific.
format	article
author	Vigan Mensah Kay. I. Ohshima
author_facet	Vigan Mensah Kay. I. Ohshima
author_sort	Vigan Mensah
title	Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific
title_short	Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific
title_full	Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific
title_fullStr	Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific
title_full_unstemmed	Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific
title_sort	weakened overturning and tide control the properties of oyashio intermediate water, a key water mass in the north pacific
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/df51575c0cc242eea1adfa9f8a697062
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Weakened overturning and tide control the properties of Oyashio Intermediate Water, a key water mass in the North Pacific

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