Phytoplankton Size Structure in Association with Mesoscale Eddies off Central-Southern Chile: The Satellite Application of a Phytoplankton Size-Class Model

REMOTE SENSING

dc.creatorCorredor-Acosta, July Andrea
dc.creatorMorales-Van De Wyngard, Carmen Eliana
dc.creatorBrewin, Robert J W
dc.creatorAuger, Pierre-Amael
dc.creatorPizarro, Oscar
dc.creatorHormazabal, Samuel
dc.creatorAnabalón, Valeria
dc.date2021-08-23T22:56:08Z
dc.date2022-07-07T02:35:12Z
dc.date2021-08-23T22:56:08Z
dc.date2022-07-07T02:35:12Z
dc.date2018
dc.date.accessioned2023-08-22T03:42:14Z
dc.date.available2023-08-22T03:42:14Z
dc.identifier1151299
dc.identifier1151299
dc.identifierhttps://hdl.handle.net/10533/251783
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8316203
dc.descriptionUnderstanding the influence of mesoscale and submesoscale features on the structure of phytoplankton is a key aspect in the assessment of their influence on marine biogeochemical cycling and cross-shore exchanges of plankton in Eastern Boundary Current Systems (EBCS). In this study, the spatio-temporal evolution of phytoplankton size classes (PSC) in surface waters associated with mesoscale eddies in the EBCS off central-southern Chile was analyzed. Chlorophyll-a (Chl-a) size-fractionated filtration (SFF) data from in situ samplings in coastal and coastal transition waters were used to tune a three-component (micro-, nano-, and pico-phytoplankton) model, which was then applied to total Chl-a satellite data (ESA OC-CCI product) in order to retrieve the Chl-a concentration of each PSC. A sea surface, height-based eddy-tracking algorithm was used to identify and track one cyclonic (sC) and three anticyclonic (ssAC1, ssAC2, sAC) mesoscale eddies between January 2014 and October 2015. Satellite estimates of PSC and in situ SFF Chl-a data were highly correlated (0.64 < r < 0.87), although uncertainty values for the microplankton fraction were moderate to high (50 to 100% depending on the metric used). The largest changes in size structure took place during the early life of eddies (similar to 2 months), and no major differences in PSC between eddy center and periphery were found. The contribution of the microplankton fraction was similar to 50% (similar to 30%) in sC and ssAC1 (ssAC2 and sAC) eddies when they were located close to the coast, while nanoplankton was dominant (similar to 60-70%) and picoplankton almost constant (<20%) throughout the lifetime of eddies. These results suggest that the three-component model, which has been mostly applied in oceanic waters, is also applicable to highly productive coastal upwelling systems. Additionally, the PSC changes within mesoscale eddies obtained by this satellite approach are in agreement with results on phytoplankton size distribution in mesoscale and submesoscale features in this region, and are most likely triggered by variations in nutrient concentrations and/or ratios during the eddies' lifetimes.
dc.descriptionRegular 2015
dc.descriptionFONDECYT
dc.descriptionFONDECYT
dc.languageeng
dc.relationhandle/10533/111557
dc.relationhandle/10533/111541
dc.relationhandle/10533/108045
dc.relationhttps://doi.org/10.3390/rs10060834
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.rightsinfo:eu-repo/semantics/article
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titlePhytoplankton Size Structure in Association with Mesoscale Eddies off Central-Southern Chile: The Satellite Application of a Phytoplankton Size-Class Model
dc.titleREMOTE SENSING
dc.typeArticulo
dc.typeinfo:eu-repo/semantics/publishedVersion


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