Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait
Phytoplankton in the ocean are extremely diverse. The abundance of various intracellular pigments are often used to study phytoplankton physiology and ecology, and identify and quantify different phytoplankton groups. In this study, phytoplankton absorption spectra ( aph(λ)" role="presenta...
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ftunivndakota:oai:commons.und.edu:essp-fac-1000 2023-05-15T16:18:06+02:00 Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait Liu, Yangyang Boss, Emmanuel Chase, Alison Xi, Hongyan Zhang, Xiaodong Röttgers, Rüdiger Pan, Yanqun Bracher, Astrid 2019-02-01T08:00:00Z application/pdf https://commons.und.edu/essp-fac/1 https://commons.und.edu/cgi/viewcontent.cgi?article=1000&context=essp-fac unknown UND Scholarly Commons https://commons.und.edu/essp-fac/1 https://commons.und.edu/cgi/viewcontent.cgi?article=1000&context=essp-fac http://creativecommons.org/licenses/by/4.0/ CC-BY Earth System Science and Policy Faculty Publications phytoplankton pigments phytoplankton absorption underway AC-S flow-through system Gaussian decomposition matrix inversion singular value decomposition non-negative least squares text 2019 ftunivndakota 2022-09-14T06:12:16Z Phytoplankton in the ocean are extremely diverse. The abundance of various intracellular pigments are often used to study phytoplankton physiology and ecology, and identify and quantify different phytoplankton groups. In this study, phytoplankton absorption spectra ( aph(λ)" role="presentation" style="box-sizing: border-box; max-height: none; display: inline; line-height: normal; text-align: left; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">aph(λ) ) derived from underway flow-through AC-S measurements in the Fram Strait are combined with phytoplankton pigment measurements analyzed by high-performance liquid chromatography (HPLC) to evaluate the retrieval of various pigment concentrations at high spatial resolution. The performances of two approaches, Gaussian decomposition and the matrix inversion technique are investigated and compared. Our study is the first to apply the matrix inversion technique to underway spectrophotometry data. We find that Gaussian decomposition provides good estimates (median absolute percentage error, MPE 21–34%) of total chlorophyll-a (TChl-a), total chlorophyll-b (TChl-b), the combination of chlorophyll-c1 and -c2 (Chl-c1/2), photoprotective (PPC) and photosynthetic carotenoids (PSC). This method outperformed one of the matrix inversion algorithms, i.e., singular value decomposition combined with non-negative least squares (SVD-NNLS), in retrieving TChl-b, Chl-c1/2, PSC, and PPC. However, SVD-NNLS enables robust retrievals of specific carotenoids (MPE 37–65%), i.e., fucoxanthin, diadinoxanthin and 19′" role="presentation" style="box-sizing: border-box; max-height: none; display: inline; line-height: normal; text-align: left; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: ... Text Fram Strait UND Scholarly Commons (University of North Dakota) |
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Open Polar |
collection |
UND Scholarly Commons (University of North Dakota) |
op_collection_id |
ftunivndakota |
language |
unknown |
topic |
phytoplankton pigments phytoplankton absorption underway AC-S flow-through system Gaussian decomposition matrix inversion singular value decomposition non-negative least squares |
spellingShingle |
phytoplankton pigments phytoplankton absorption underway AC-S flow-through system Gaussian decomposition matrix inversion singular value decomposition non-negative least squares Liu, Yangyang Boss, Emmanuel Chase, Alison Xi, Hongyan Zhang, Xiaodong Röttgers, Rüdiger Pan, Yanqun Bracher, Astrid Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait |
topic_facet |
phytoplankton pigments phytoplankton absorption underway AC-S flow-through system Gaussian decomposition matrix inversion singular value decomposition non-negative least squares |
description |
Phytoplankton in the ocean are extremely diverse. The abundance of various intracellular pigments are often used to study phytoplankton physiology and ecology, and identify and quantify different phytoplankton groups. In this study, phytoplankton absorption spectra ( aph(λ)" role="presentation" style="box-sizing: border-box; max-height: none; display: inline; line-height: normal; text-align: left; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">aph(λ) ) derived from underway flow-through AC-S measurements in the Fram Strait are combined with phytoplankton pigment measurements analyzed by high-performance liquid chromatography (HPLC) to evaluate the retrieval of various pigment concentrations at high spatial resolution. The performances of two approaches, Gaussian decomposition and the matrix inversion technique are investigated and compared. Our study is the first to apply the matrix inversion technique to underway spectrophotometry data. We find that Gaussian decomposition provides good estimates (median absolute percentage error, MPE 21–34%) of total chlorophyll-a (TChl-a), total chlorophyll-b (TChl-b), the combination of chlorophyll-c1 and -c2 (Chl-c1/2), photoprotective (PPC) and photosynthetic carotenoids (PSC). This method outperformed one of the matrix inversion algorithms, i.e., singular value decomposition combined with non-negative least squares (SVD-NNLS), in retrieving TChl-b, Chl-c1/2, PSC, and PPC. However, SVD-NNLS enables robust retrievals of specific carotenoids (MPE 37–65%), i.e., fucoxanthin, diadinoxanthin and 19′" role="presentation" style="box-sizing: border-box; max-height: none; display: inline; line-height: normal; text-align: left; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: ... |
format |
Text |
author |
Liu, Yangyang Boss, Emmanuel Chase, Alison Xi, Hongyan Zhang, Xiaodong Röttgers, Rüdiger Pan, Yanqun Bracher, Astrid |
author_facet |
Liu, Yangyang Boss, Emmanuel Chase, Alison Xi, Hongyan Zhang, Xiaodong Röttgers, Rüdiger Pan, Yanqun Bracher, Astrid |
author_sort |
Liu, Yangyang |
title |
Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait |
title_short |
Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait |
title_full |
Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait |
title_fullStr |
Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait |
title_full_unstemmed |
Retrieval of Phytoplankton Pigments from Underway Spectrophotometry in the Fram Strait |
title_sort |
retrieval of phytoplankton pigments from underway spectrophotometry in the fram strait |
publisher |
UND Scholarly Commons |
publishDate |
2019 |
url |
https://commons.und.edu/essp-fac/1 https://commons.und.edu/cgi/viewcontent.cgi?article=1000&context=essp-fac |
genre |
Fram Strait |
genre_facet |
Fram Strait |
op_source |
Earth System Science and Policy Faculty Publications |
op_relation |
https://commons.und.edu/essp-fac/1 https://commons.und.edu/cgi/viewcontent.cgi?article=1000&context=essp-fac |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766004219386527744 |