Photosynthetic rates derived from satellite-based chlorophyll concentration

We assembled a dataset of 14C-based productivity measurements to understand the critical variables required for accurate assessment of daily depth-integrated phytoplankton carbon fixation (PP(PPeu)u) from measurements of sea surface pigment concentrations (Csat)(Csat). From this dataset, we developed a light-dependent, depth-resolved model for carbon fixation (VGPM) that partitions environmental factors affecting primary production into those that influence the relative vertical distribution of primary production (Pz)z) and those that control the optimal assimilation efficiency of the productivity profile (P(PBopt). The VGPM accounted for 79% of the observed variability in Pz and 86% of the variability in PPeu by using measured values of PBopt. Our results indicate that the accuracy of productivity algorithms in estimating PPeu is dependent primarily upon the ability to accurately represent variability in Pbopt. We developed a temperature-dependent Pbopt model that was used in conjunction with monthly climatological images of Csat sea surface temperature, and cloud-corrected estimates of surface irradiance to calculate a global annual phytoplankton carbon fixation (PPannu) rate of 43.5 Pg C yr‒1. The geographical distribution of PPannu was distinctly different than results from previous models. Our results illustrate the importance of focusing Pbopt model development on temporal and spatial, rather than the vertical, variability.
 
Citation proposal
Michael J. Behrenfeld (Oceanographic and Atmospheric Sciences Division, Brookhaven National Laboratory) - Paul G. Falkowski (Oceanographic and Atmospheric Sciences Division, Brookhaven National Laboratory) (2003) . Photosynthetic rates derived from satellite-based chlorophyll concentration. https://services.mspdata.eu:/geonetwork/srv/api/records/75daa714-09af-4732-930d-a4cd599ad591

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Date ( Publication )
2003-12-22
Identifier
75daa714-09af-4732-930d-a4cd599ad591

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Thèmes Sextant ( Theme )
GEMET - INSPIRE themes, version 1.0 ( Theme )
Mission Atlantic - Resources ( Theme )
  • Article
Mission Atlantic - Case Studies ( Theme )
  • Norwegian Sea
Mission Atlantic - BODC Parameters ( Theme )
  • /Cross-discipline/Rate measurements , /Biological oceanography/Phytoplankton and microphytobenthos
Mission Atlantic - Data type (DMP) ( Theme )
  • Modelling data
Mission Atlantic - Work Package ( Theme )
  • WP5 Assessing state, drivers and tipping points
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Grid
Metadata language
English
Character set
UTF8
Topic category
  • Oceans
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Photosynthetic rates derived from satellite-based chlorophyll concentration  
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document

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75daa714-09af-4732-930d-a4cd599ad591   XML
Metadata language
English
Character set
UTF8
Hierarchy level
document
Date stamp
2021-12-09T11:38:06
Metadata standard name
ISO 19115:2003/19139 - SEXTANT
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1.0

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https://sextant.ifremer.fr/eng  
 
 

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