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dc.contributor.authorVikebø, Frode Bendiksen
dc.contributor.authorStrand, Kjersti Opstad
dc.contributor.authorSundby, Svein
dc.PublishedVikebø FB, Strand KO, Sundby S. Wind Intensity Is Key to Phytoplankton Spring Bloom Under Climate Change. Frontiers in Marine Science. 2019;6:518eng
dc.description.abstractThe onset of the spring bloom (OSB) occurs when phytoplankton growth exceeds losses and is promoted by a transition from deep convection to a shallow mixing layer concurrent with increasing light intensities in nutrient-enriched waters. We have combined remotely sensed chlorophyll-a data and high-resolution sea-surface winds to quantify and understand high-latitude spring-bloom dynamics and the effect of varying winds. Increasing winds strengthen turbulent mixing and may eventually cause the mixing depth to extend beyond the depth at which light is favorable for net growth and delay the OSB. We find that wind intensity accounts for up to 60% of the interannual variation in the OSB as revealed by remotely sensed chlorophyll-a values at the key spawning ground (62–63°N) of one of the worlds’ largest herring stocks. The OSB is, on average, 1 month later and with about half the variability farther north at the main spawning ground (67–68°N) of one of the world’s largest cod stocks. Since the atmospheric reanalysis considered here extends wind time series much further back in time (1958) than remote sensing (1998), the former may act as a good proxy for investigating OSB trends on the time scales of multi-decadal variability and climate change. We find a weak but non-significant signal of delay in the OSB across these extended time periods. More importantly, our results clearly show that predictions of future productivity and ecosystem dynamics under global warming based on earth system models require accurate representation of winds.en_US
dc.rightsAttribution CC BYeng
dc.subjectremote sensingeng
dc.subjectfish larvaeeng
dc.titleWind Intensity Is Key to Phytoplankton Spring Bloom Under Climate Changeen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2019 The Author(s)en_US
dc.source.journalFrontiers in Marine Science
dc.relation.projectNorges forskningsråd: 244262
dc.relation.projectNorges forskningsråd: 255487

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