Magnitude of nitrate turbulent diffusion in contrasting marine environments

Abstract Difficulties to quantify ocean turbulence have limited our knowledge about the magnitude and variability of nitrate turbulent diffusion, which constitutes one of the main processes responsible for the supply of nitrogen to phytoplankton inhabiting the euphotic zone. We use an extensive data...

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Autores principales:	Beatriz Mouriño-Carballido, José Luis Otero Ferrer, Bieito Fernández Castro, Emilio Marañón, Mariña Blazquez Maseda, Borja Aguiar-González, Paloma Chouciño, Rocío Graña, Víctor Moreira-Coello, Marina Villamaña
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2e10dece4e2743b181b1a38925b208f4
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spelling	oai:doaj.org-article:2e10dece4e2743b181b1a38925b208f42021-12-02T18:48:23ZMagnitude of nitrate turbulent diffusion in contrasting marine environments10.1038/s41598-021-97731-42045-2322https://doaj.org/article/2e10dece4e2743b181b1a38925b208f42021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97731-4https://doaj.org/toc/2045-2322Abstract Difficulties to quantify ocean turbulence have limited our knowledge about the magnitude and variability of nitrate turbulent diffusion, which constitutes one of the main processes responsible for the supply of nitrogen to phytoplankton inhabiting the euphotic zone. We use an extensive dataset of microturbulence observations collected in contrasting oceanic regions, to build a model for nitrate diffusion into the euphotic zone, and obtain the first global map for the distribution of this process. A model including two predictors (surface temperature and nitrate vertical gradient) explained 50% of the variance in the nitrate diffusive flux. This model was applied to climatological data to predict nitrate diffusion in oligotrophic mid and low latitude regions. Mean nitrate diffusion (~ 20 Tmol N y−1) was comparable to nitrate entrainment due to seasonal mixed-layer deepening between 40°N–40ºS, and to the sum of global estimates of nitrogen fixation, fluvial fluxes and atmospheric deposition. These results indicate that nitrate diffusion represents one of the major sources of new nitrogen into the surface ocean in these regions.Beatriz Mouriño-CarballidoJosé Luis Otero FerrerBieito Fernández CastroEmilio MarañónMariña Blazquez MasedaBorja Aguiar-GonzálezPaloma ChouciñoRocío GrañaVíctor Moreira-CoelloMarina VillamañaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Beatriz Mouriño-Carballido José Luis Otero Ferrer Bieito Fernández Castro Emilio Marañón Mariña Blazquez Maseda Borja Aguiar-González Paloma Chouciño Rocío Graña Víctor Moreira-Coello Marina Villamaña Magnitude of nitrate turbulent diffusion in contrasting marine environments
description	Abstract Difficulties to quantify ocean turbulence have limited our knowledge about the magnitude and variability of nitrate turbulent diffusion, which constitutes one of the main processes responsible for the supply of nitrogen to phytoplankton inhabiting the euphotic zone. We use an extensive dataset of microturbulence observations collected in contrasting oceanic regions, to build a model for nitrate diffusion into the euphotic zone, and obtain the first global map for the distribution of this process. A model including two predictors (surface temperature and nitrate vertical gradient) explained 50% of the variance in the nitrate diffusive flux. This model was applied to climatological data to predict nitrate diffusion in oligotrophic mid and low latitude regions. Mean nitrate diffusion (~ 20 Tmol N y−1) was comparable to nitrate entrainment due to seasonal mixed-layer deepening between 40°N–40ºS, and to the sum of global estimates of nitrogen fixation, fluvial fluxes and atmospheric deposition. These results indicate that nitrate diffusion represents one of the major sources of new nitrogen into the surface ocean in these regions.
format	article
author	Beatriz Mouriño-Carballido José Luis Otero Ferrer Bieito Fernández Castro Emilio Marañón Mariña Blazquez Maseda Borja Aguiar-González Paloma Chouciño Rocío Graña Víctor Moreira-Coello Marina Villamaña
author_facet	Beatriz Mouriño-Carballido José Luis Otero Ferrer Bieito Fernández Castro Emilio Marañón Mariña Blazquez Maseda Borja Aguiar-González Paloma Chouciño Rocío Graña Víctor Moreira-Coello Marina Villamaña
author_sort	Beatriz Mouriño-Carballido
title	Magnitude of nitrate turbulent diffusion in contrasting marine environments
title_short	Magnitude of nitrate turbulent diffusion in contrasting marine environments
title_full	Magnitude of nitrate turbulent diffusion in contrasting marine environments
title_fullStr	Magnitude of nitrate turbulent diffusion in contrasting marine environments
title_full_unstemmed	Magnitude of nitrate turbulent diffusion in contrasting marine environments
title_sort	magnitude of nitrate turbulent diffusion in contrasting marine environments
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2e10dece4e2743b181b1a38925b208f4
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Magnitude of nitrate turbulent diffusion in contrasting marine environments

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