Effect of small scale transport processes on phytoplankton distribution in coastal seas

Coastal ocean ecosystems are major contributors to the global biogeochemical cycles and biological productivity. Physical factors induced by the turbulent flow play a crucial role in regulating marine ecosystems. However, while large-scale open-ocean dynamics is well described by geostrophy, the rol...

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Autores: Hernández Carrasco, Ismael, Orfila, Alejandro, Rossi, Vincent, Garçon, Veronique
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/379394
Acceso en línea:http://hdl.handle.net/10261/379394
https://api.elsevier.com/content/abstract/scopus_id/85048093483
Access Level:acceso abierto
Palabra clave:Lagrangian dynamics
Coastal oceanography
Biophysical interactions
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spelling Effect of small scale transport processes on phytoplankton distribution in coastal seasHernández Carrasco, IsmaelOrfila, AlejandroRossi, VincentGarçon, VeroniqueLagrangian dynamicsCoastal oceanographyBiophysical interactionsCoastal ocean ecosystems are major contributors to the global biogeochemical cycles and biological productivity. Physical factors induced by the turbulent flow play a crucial role in regulating marine ecosystems. However, while large-scale open-ocean dynamics is well described by geostrophy, the role of multiscale transport processes in coastal regions is still poorly understood due to the lack of continuous high-resolution observations. Here, the influence of small-scale dynamics (O(3.5-25) km, i.e. spanning upper submesoscale and mesoscale processes) on surface phytoplankton derived from satellite chlorophyll-a (Chl-a) is studied using Lagrangian metrics computed from High-Frequency Radar currents. The combination of complementary Lagrangian diagnostics, including the Lagrangian divergence along fluid trajectories, provides an improved description of the 3D flow geometry which facilitates the interpretation of two non-exclusive physical mechanisms affecting phytoplankton dynamics and patchiness. Attracting small-scale fronts, unveiled by backwards Lagrangian Coherent Structures, are associated to negative divergence where particles and Chl-a standing stocks cluster. Filaments of positive divergence, representing large accumulated upward vertical velocities and suggesting accrued injection of subsurface nutrients, match areas with large Chl-a concentrations. Our findings demonstrate that an accurate characterization of small-scale transport processes is necessary to comprehend bio-physical interactions in coastal seas.Peer reviewedNature Publishing GroupConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202520252018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/379394https://api.elsevier.com/content/abstract/scopus_id/85048093483reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésScientific reportshttps://doi.org/10.1038/s41598-018-26857-9Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3793942026-05-22T06:33:51Z
dc.title.none.fl_str_mv Effect of small scale transport processes on phytoplankton distribution in coastal seas
title Effect of small scale transport processes on phytoplankton distribution in coastal seas
spellingShingle Effect of small scale transport processes on phytoplankton distribution in coastal seas
Hernández Carrasco, Ismael
Lagrangian dynamics
Coastal oceanography
Biophysical interactions
title_short Effect of small scale transport processes on phytoplankton distribution in coastal seas
title_full Effect of small scale transport processes on phytoplankton distribution in coastal seas
title_fullStr Effect of small scale transport processes on phytoplankton distribution in coastal seas
title_full_unstemmed Effect of small scale transport processes on phytoplankton distribution in coastal seas
title_sort Effect of small scale transport processes on phytoplankton distribution in coastal seas
dc.creator.none.fl_str_mv Hernández Carrasco, Ismael
Orfila, Alejandro
Rossi, Vincent
Garçon, Veronique
author Hernández Carrasco, Ismael
author_facet Hernández Carrasco, Ismael
Orfila, Alejandro
Rossi, Vincent
Garçon, Veronique
author_role author
author2 Orfila, Alejandro
Rossi, Vincent
Garçon, Veronique
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Lagrangian dynamics
Coastal oceanography
Biophysical interactions
topic Lagrangian dynamics
Coastal oceanography
Biophysical interactions
description Coastal ocean ecosystems are major contributors to the global biogeochemical cycles and biological productivity. Physical factors induced by the turbulent flow play a crucial role in regulating marine ecosystems. However, while large-scale open-ocean dynamics is well described by geostrophy, the role of multiscale transport processes in coastal regions is still poorly understood due to the lack of continuous high-resolution observations. Here, the influence of small-scale dynamics (O(3.5-25) km, i.e. spanning upper submesoscale and mesoscale processes) on surface phytoplankton derived from satellite chlorophyll-a (Chl-a) is studied using Lagrangian metrics computed from High-Frequency Radar currents. The combination of complementary Lagrangian diagnostics, including the Lagrangian divergence along fluid trajectories, provides an improved description of the 3D flow geometry which facilitates the interpretation of two non-exclusive physical mechanisms affecting phytoplankton dynamics and patchiness. Attracting small-scale fronts, unveiled by backwards Lagrangian Coherent Structures, are associated to negative divergence where particles and Chl-a standing stocks cluster. Filaments of positive divergence, representing large accumulated upward vertical velocities and suggesting accrued injection of subsurface nutrients, match areas with large Chl-a concentrations. Our findings demonstrate that an accurate characterization of small-scale transport processes is necessary to comprehend bio-physical interactions in coastal seas.
publishDate 2018
dc.date.none.fl_str_mv 2018
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/379394
https://api.elsevier.com/content/abstract/scopus_id/85048093483
url http://hdl.handle.net/10261/379394
https://api.elsevier.com/content/abstract/scopus_id/85048093483
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Scientific reports
https://doi.org/10.1038/s41598-018-26857-9
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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