Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models
Chlorophyll-a satellite products are routinely used in oceanography, providing a synoptic and global view of phytoplankton abundance. However, these products lack information on the community structure of the phytoplankton, which is crucial for ecological modelling and ecosystem studies. To assess t...
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ftunivlisboa:oai:repositorio.ul.pt:10451/41026 2023-05-15T17:38:35+02:00 Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models Brito, Ana C. Sá, Carolina Brotas, Vanda Brewin, Robert J.W. Silva, Teresa Vitorino, João Platt, Trevor Sathyendranath, Shubha 2020-01-19T14:21:37Z http://hdl.handle.net/10451/41026 https://doi.org/10.1016/j.rse.2014.10.020 eng eng 0034-4257 http://hdl.handle.net/10451/41026 doi:10.1016/j.rse.2014.10.020 restrictedAccess Remote sensing Phytoplankton size classes Ocean colour Pigments Chlorophyll-a Western Iberian coast article 2020 ftunivlisboa https://doi.org/10.1016/j.rse.2014.10.020 2022-05-25T18:39:51Z Chlorophyll-a satellite products are routinely used in oceanography, providing a synoptic and global view of phytoplankton abundance. However, these products lack information on the community structure of the phytoplankton, which is crucial for ecological modelling and ecosystem studies. To assess the usefulness of existing methods to differentiate phytoplankton functional types (PFT) or phytoplankton size classes from satellite data, in-situ phytoplankton samples collected in the Western Iberian coast, on the North-East Atlantic, were analysed for pigments and absorption spectra. Water samples were collected in five different locations, four of which were located near the shore and another in an open-ocean, seamount region. Three different modelling approaches for deriving phytoplankton size classes were applied to the in situ data. Approaches tested provide phytoplankton size class information based on the input of pigments data (Brewin et al., 2010), absorption spectra data (Ciotti et al., 2002) or both (Uitz et al., 2008). Following Uitz et al. (2008), results revealed high variability in microphytoplankton chlorophyll-specific absorption coefficients, ranging from 0.01 to 0.09 m2 (mg chl)− 1 between 400 and 500 nm. This spectral analysis suggested, in one of the regions, the existence of small cells (< 20 μm) in the fraction of phytoplankton presumed to be microphytoplankton (based on diagnostic pigments). Ciotti et al. (2002) approach yielded the highest differences between modelled and measured absorption spectra for the locations where samples had high variability in community structure and cell size. The Brewin et al. (2010) pigment-based model was adjusted and a set of model coefficients are presented and recommended for future studies in offshore water of the Western Iberian coast. info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper North East Atlantic Universidade de Lisboa: repositório.UL Remote Sensing of Environment 156 537 550 |
institution |
Open Polar |
collection |
Universidade de Lisboa: repositório.UL |
op_collection_id |
ftunivlisboa |
language |
English |
topic |
Remote sensing Phytoplankton size classes Ocean colour Pigments Chlorophyll-a Western Iberian coast |
spellingShingle |
Remote sensing Phytoplankton size classes Ocean colour Pigments Chlorophyll-a Western Iberian coast Brito, Ana C. Sá, Carolina Brotas, Vanda Brewin, Robert J.W. Silva, Teresa Vitorino, João Platt, Trevor Sathyendranath, Shubha Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models |
topic_facet |
Remote sensing Phytoplankton size classes Ocean colour Pigments Chlorophyll-a Western Iberian coast |
description |
Chlorophyll-a satellite products are routinely used in oceanography, providing a synoptic and global view of phytoplankton abundance. However, these products lack information on the community structure of the phytoplankton, which is crucial for ecological modelling and ecosystem studies. To assess the usefulness of existing methods to differentiate phytoplankton functional types (PFT) or phytoplankton size classes from satellite data, in-situ phytoplankton samples collected in the Western Iberian coast, on the North-East Atlantic, were analysed for pigments and absorption spectra. Water samples were collected in five different locations, four of which were located near the shore and another in an open-ocean, seamount region. Three different modelling approaches for deriving phytoplankton size classes were applied to the in situ data. Approaches tested provide phytoplankton size class information based on the input of pigments data (Brewin et al., 2010), absorption spectra data (Ciotti et al., 2002) or both (Uitz et al., 2008). Following Uitz et al. (2008), results revealed high variability in microphytoplankton chlorophyll-specific absorption coefficients, ranging from 0.01 to 0.09 m2 (mg chl)− 1 between 400 and 500 nm. This spectral analysis suggested, in one of the regions, the existence of small cells (< 20 μm) in the fraction of phytoplankton presumed to be microphytoplankton (based on diagnostic pigments). Ciotti et al. (2002) approach yielded the highest differences between modelled and measured absorption spectra for the locations where samples had high variability in community structure and cell size. The Brewin et al. (2010) pigment-based model was adjusted and a set of model coefficients are presented and recommended for future studies in offshore water of the Western Iberian coast. info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Brito, Ana C. Sá, Carolina Brotas, Vanda Brewin, Robert J.W. Silva, Teresa Vitorino, João Platt, Trevor Sathyendranath, Shubha |
author_facet |
Brito, Ana C. Sá, Carolina Brotas, Vanda Brewin, Robert J.W. Silva, Teresa Vitorino, João Platt, Trevor Sathyendranath, Shubha |
author_sort |
Brito, Ana C. |
title |
Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models |
title_short |
Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models |
title_full |
Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models |
title_fullStr |
Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models |
title_full_unstemmed |
Effect of phytoplankton size classes on bio-optical properties of phytoplankton in the Western Iberian coast: Application of models |
title_sort |
effect of phytoplankton size classes on bio-optical properties of phytoplankton in the western iberian coast: application of models |
publishDate |
2020 |
url |
http://hdl.handle.net/10451/41026 https://doi.org/10.1016/j.rse.2014.10.020 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
0034-4257 http://hdl.handle.net/10451/41026 doi:10.1016/j.rse.2014.10.020 |
op_rights |
restrictedAccess |
op_doi |
https://doi.org/10.1016/j.rse.2014.10.020 |
container_title |
Remote Sensing of Environment |
container_volume |
156 |
container_start_page |
537 |
op_container_end_page |
550 |
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1766139093368963072 |