Impact of measurement uncertainties on determination of chlorophyll-specific absorption coefficient for marine phytoplankton

David McKee, Rüdiger Röttgers, Griet Neukermans, Violeta Sanjuan Calzado, Charles Trees, Marina Ampolo-Rella, Claire Neil, Alex Cunningham

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Understanding variability in the chlorophyll-specific absorption of marine phytoplankton, aph*Chl (λ), is essential for primary production modelling, calculation of underwater light field characteristics, and development of algorithms for remote sensing of chlorophyll concentrations. Previous field and laboratory studies have demonstrated significant apparent variability in aph*Chl (λ) for natural samples and algal cultures. However, the potential impact of measurement uncertainties on derived values of aph*Chl (λ) has received insufficient study. This study presents an analysis of measurement uncertainties for a data set collected in the Ligurian Sea in Spring and assesses the impact on estimates of aph*Chl (λ). It is found that a large proportion of apparent variability in this set of aph*Chl (λ) can be attributed to measurement errors. Application of the same analysis to the global NOMAD data set suggests that a significant fraction of variability in aph*Chl (λ) may also be due to measurement errors.
LanguageEnglish
Number of pages13
JournalJournal of Geophysical Research: Oceans
Early online date30 Dec 2014
DOIs
Publication statusPublished - 2015

Fingerprint

phytoplankton
Phytoplankton
absorption coefficient
chlorophylls
Chlorophyll
Measurement errors
absorptivity
chlorophyll
uncertainty
algal culture
primary production
Remote sensing
remote sensing
modeling
proportion
analysis
Uncertainty
estimates
sampling
laboratory

Keywords

  • chlorophyll-specific absorption
  • chlorophyll uncertainty
  • filter pad absorption
  • point source integrating

Cite this

McKee, David ; Röttgers, Rüdiger ; Neukermans, Griet ; Calzado, Violeta Sanjuan ; Trees, Charles ; Ampolo-Rella, Marina ; Neil, Claire ; Cunningham, Alex. / Impact of measurement uncertainties on determination of chlorophyll-specific absorption coefficient for marine phytoplankton. In: Journal of Geophysical Research: Oceans. 2015.
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Impact of measurement uncertainties on determination of chlorophyll-specific absorption coefficient for marine phytoplankton. / McKee, David; Röttgers, Rüdiger; Neukermans, Griet; Calzado, Violeta Sanjuan; Trees, Charles; Ampolo-Rella, Marina; Neil, Claire; Cunningham, Alex.

In: Journal of Geophysical Research: Oceans, 2015.

Research output: Contribution to journalArticle

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T1 - Impact of measurement uncertainties on determination of chlorophyll-specific absorption coefficient for marine phytoplankton

AU - McKee, David

AU - Röttgers, Rüdiger

AU - Neukermans, Griet

AU - Calzado, Violeta Sanjuan

AU - Trees, Charles

AU - Ampolo-Rella, Marina

AU - Neil, Claire

AU - Cunningham, Alex

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AB - Understanding variability in the chlorophyll-specific absorption of marine phytoplankton, aph*Chl (λ), is essential for primary production modelling, calculation of underwater light field characteristics, and development of algorithms for remote sensing of chlorophyll concentrations. Previous field and laboratory studies have demonstrated significant apparent variability in aph*Chl (λ) for natural samples and algal cultures. However, the potential impact of measurement uncertainties on derived values of aph*Chl (λ) has received insufficient study. This study presents an analysis of measurement uncertainties for a data set collected in the Ligurian Sea in Spring and assesses the impact on estimates of aph*Chl (λ). It is found that a large proportion of apparent variability in this set of aph*Chl (λ) can be attributed to measurement errors. Application of the same analysis to the global NOMAD data set suggests that a significant fraction of variability in aph*Chl (λ) may also be due to measurement errors.

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