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Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait

Steep oceanic ridges and tidal currents in the Luzon Strait generate some of the world’s strongest turbulent mixing. To evaluate the impacts of the turbulence intensity on the marine ecosystem, we carried out measurements of microstructure turbulence and biogeochemical hydrography along 21°N in the...

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Autores principales: Tsutsumi, Eisuke, Matsuno, Takeshi, Itoh, Sachihiko, Zhang, Jing, Senjyu, Tomoharu, Sakai, Akie, Lee, Keunjong, Yanagimoto, Daigo, Yasuda, Ichiro, Ogawa, Hiroshi, Villanoy, Cesar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7577972/
https://www.ncbi.nlm.nih.gov/pubmed/33087854
http://dx.doi.org/10.1038/s41598-020-74938-5
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author Tsutsumi, Eisuke
Matsuno, Takeshi
Itoh, Sachihiko
Zhang, Jing
Senjyu, Tomoharu
Sakai, Akie
Lee, Keunjong
Yanagimoto, Daigo
Yasuda, Ichiro
Ogawa, Hiroshi
Villanoy, Cesar
author_facet Tsutsumi, Eisuke
Matsuno, Takeshi
Itoh, Sachihiko
Zhang, Jing
Senjyu, Tomoharu
Sakai, Akie
Lee, Keunjong
Yanagimoto, Daigo
Yasuda, Ichiro
Ogawa, Hiroshi
Villanoy, Cesar
author_sort Tsutsumi, Eisuke
collection PubMed
description Steep oceanic ridges and tidal currents in the Luzon Strait generate some of the world’s strongest turbulent mixing. To evaluate the impacts of the turbulence intensity on the marine ecosystem, we carried out measurements of microstructure turbulence and biogeochemical hydrography along 21°N in the Luzon Strait during the R/V Hakuho Maru cruise, KH-17-5-2, in November 2017. We found a turbulent kinetic energy dissipation rate exceeding O(10(−7)) W kg(−1) and vertical eddy diffusivity exceeding O(10(−3)) m(2) s(−1), two orders of magnitude larger than those in the open ocean, above a shallow sub-ridge on the eastern ridge of the Luzon Strait. In addition, a clear chlorophyll a bloom was identified in the surface layer above the sub-ridge from in situ measurements and satellite observations. High values of nitrate (4.7 mmol N m(−2) d(−1)) and phosphate (0.33 mmol P m(−2) d(−1)) fluxes estimated near the base of the surface chlorophyll a bloom strongly suggest that enhanced turbulent mixing promotes nutrient supply to the euphotic zone and generates new production within the surface layer, contributing to the formation of a quasi-permanent local chlorophyll a bloom north of Itbayat Island on the eastern ridge.
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spelling pubmed-75779722020-10-23 Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait Tsutsumi, Eisuke Matsuno, Takeshi Itoh, Sachihiko Zhang, Jing Senjyu, Tomoharu Sakai, Akie Lee, Keunjong Yanagimoto, Daigo Yasuda, Ichiro Ogawa, Hiroshi Villanoy, Cesar Sci Rep Article Steep oceanic ridges and tidal currents in the Luzon Strait generate some of the world’s strongest turbulent mixing. To evaluate the impacts of the turbulence intensity on the marine ecosystem, we carried out measurements of microstructure turbulence and biogeochemical hydrography along 21°N in the Luzon Strait during the R/V Hakuho Maru cruise, KH-17-5-2, in November 2017. We found a turbulent kinetic energy dissipation rate exceeding O(10(−7)) W kg(−1) and vertical eddy diffusivity exceeding O(10(−3)) m(2) s(−1), two orders of magnitude larger than those in the open ocean, above a shallow sub-ridge on the eastern ridge of the Luzon Strait. In addition, a clear chlorophyll a bloom was identified in the surface layer above the sub-ridge from in situ measurements and satellite observations. High values of nitrate (4.7 mmol N m(−2) d(−1)) and phosphate (0.33 mmol P m(−2) d(−1)) fluxes estimated near the base of the surface chlorophyll a bloom strongly suggest that enhanced turbulent mixing promotes nutrient supply to the euphotic zone and generates new production within the surface layer, contributing to the formation of a quasi-permanent local chlorophyll a bloom north of Itbayat Island on the eastern ridge. Nature Publishing Group UK 2020-10-21 /pmc/articles/PMC7577972/ /pubmed/33087854 http://dx.doi.org/10.1038/s41598-020-74938-5 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Tsutsumi, Eisuke
Matsuno, Takeshi
Itoh, Sachihiko
Zhang, Jing
Senjyu, Tomoharu
Sakai, Akie
Lee, Keunjong
Yanagimoto, Daigo
Yasuda, Ichiro
Ogawa, Hiroshi
Villanoy, Cesar
Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait
title Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait
title_full Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait
title_fullStr Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait
title_full_unstemmed Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait
title_short Vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the Luzon Strait
title_sort vertical fluxes of nutrients enhanced by strong turbulence and phytoplankton bloom around the ocean ridge in the luzon strait
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7577972/
https://www.ncbi.nlm.nih.gov/pubmed/33087854
http://dx.doi.org/10.1038/s41598-020-74938-5
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