Intermittency in phytoplankton bloom triggered by modulations in vertical stability

Abstract Seasonal surface chlorophyll (SChl) blooms are very chaotic in nature, but traditional bloom paradigms have climbed out of these subseasonal variations. Here we highlight the leading order role of wind bursts, by conjoining two decades of satellite SChl with atmospheric reanalysis in the No...

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Autores principales:	Madhavan Girijakumari Keerthi, Marina Lévy, Olivier Aumont
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8828862fbedc46e7901ac895505523b5
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spelling	oai:doaj.org-article:8828862fbedc46e7901ac895505523b52021-12-02T15:23:07ZIntermittency in phytoplankton bloom triggered by modulations in vertical stability10.1038/s41598-020-80331-z2045-2322https://doaj.org/article/8828862fbedc46e7901ac895505523b52021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80331-zhttps://doaj.org/toc/2045-2322Abstract Seasonal surface chlorophyll (SChl) blooms are very chaotic in nature, but traditional bloom paradigms have climbed out of these subseasonal variations. Here we highlight the leading order role of wind bursts, by conjoining two decades of satellite SChl with atmospheric reanalysis in the Northwestern Mediterranean Sea. We demonstrate that weekly SChl fluctuations are in phase with weekly changes in wind stress and net heat flux during the intial state of the bloom in winter and early spring, thus expanding the convection shutdown hypothesis of bloom onset to subseasonal timescales. We postulate that the mechanism reflected by this link is intermittency in vertical stability due to short-term episodes of calm weather in winter or to stormy conditions in early spring, leading to short-term variations in light exposure or to events of vertical dilution. This strong intermittency in phytoplankton bloom may probably have important consequences on carbon export and trophic web structure and should not be overlooked.Madhavan Girijakumari KeerthiMarina LévyOlivier AumontNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Madhavan Girijakumari Keerthi Marina Lévy Olivier Aumont Intermittency in phytoplankton bloom triggered by modulations in vertical stability
description	Abstract Seasonal surface chlorophyll (SChl) blooms are very chaotic in nature, but traditional bloom paradigms have climbed out of these subseasonal variations. Here we highlight the leading order role of wind bursts, by conjoining two decades of satellite SChl with atmospheric reanalysis in the Northwestern Mediterranean Sea. We demonstrate that weekly SChl fluctuations are in phase with weekly changes in wind stress and net heat flux during the intial state of the bloom in winter and early spring, thus expanding the convection shutdown hypothesis of bloom onset to subseasonal timescales. We postulate that the mechanism reflected by this link is intermittency in vertical stability due to short-term episodes of calm weather in winter or to stormy conditions in early spring, leading to short-term variations in light exposure or to events of vertical dilution. This strong intermittency in phytoplankton bloom may probably have important consequences on carbon export and trophic web structure and should not be overlooked.
format	article
author	Madhavan Girijakumari Keerthi Marina Lévy Olivier Aumont
author_facet	Madhavan Girijakumari Keerthi Marina Lévy Olivier Aumont
author_sort	Madhavan Girijakumari Keerthi
title	Intermittency in phytoplankton bloom triggered by modulations in vertical stability
title_short	Intermittency in phytoplankton bloom triggered by modulations in vertical stability
title_full	Intermittency in phytoplankton bloom triggered by modulations in vertical stability
title_fullStr	Intermittency in phytoplankton bloom triggered by modulations in vertical stability
title_full_unstemmed	Intermittency in phytoplankton bloom triggered by modulations in vertical stability
title_sort	intermittency in phytoplankton bloom triggered by modulations in vertical stability
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8828862fbedc46e7901ac895505523b5
work_keys_str_mv	AT madhavangirijakumarikeerthi intermittencyinphytoplanktonbloomtriggeredbymodulationsinverticalstability AT marinalevy intermittencyinphytoplanktonbloomtriggeredbymodulationsinverticalstability AT olivieraumont intermittencyinphytoplanktonbloomtriggeredbymodulationsinverticalstability
_version_	1718387337617997824

Intermittency in phytoplankton bloom triggered by modulations in vertical stability

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