10 Feb 2022
10 Feb 2022
Status: a revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

Optical and biogeochemical properties of Belgian inland and coastal waters

Alexandre Castagna1, Luz Amadei Martínez1, Margarita Bogorad1, Ilse Daveloose1, Renaat Dassevile1, Heidi Melita Dierssen2, Matthew Beck3, Jonas Mortelmans4, Héloïse Lavigne3, Ana Dogliotti5, David Doxaran6, Kevin Ruddick3, Wim Vyverman1, and Koen Sabbe1 Alexandre Castagna et al.
  • 1Protistology and Aquatic Ecology, Ghent University, Ghent, Belgium
  • 2Department of Marine Sciences, University of Connecticut, Groton, CT, United States
  • 3Operational Directorate Natural Environment, Royal Belgian Institute of Natural Sciences, Brussels, Belgium
  • 4Marine Observation Centre (MOC), Flanders Marine Instute (VLIZ), Oostende, Belgium
  • 5Instituto de Astronomía y Física del Espacio (IAFE), CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
  • 6Laboratoire d’Océanographie de Villefranche, CNRS-Sorbonne University, Villefranche, France

Abstract. From 2017 to 2019, an extensive sampling campaign was conducted in Belgian inland and coastal waters, aimed at providing paired data of optical and biogeochemical properties to support research into optical monitoring of aquatic systems. The campaign was focused on inland waters, with sampling of four lakes and a coastal lagoon along the growth season, in addition to samples of opportunity of other four lakes. Campaigns also included the Scheldt estuary over a tidal cycle and two sam- pling campaigns in the Belgian coastal zone. Measured parameters include inherent optical properties (absorption, scattering and attenuation coefficients, near-forward volume scattering function, turbidity), apparent optical properties (Secchi disk depth, substrate and water-leaving Lambert-equivalent bi-hemispherical reflectance), and biogeochemical properties (suspended particulate matter, mineral fraction of particle mass, particle size distribution, pigment concentration, DNA metabarcoding, flow microscopy counts, and bottom type classification). The diversity of water bodies and environmental conditions covered a wide range of system states. The chlorophyll a concentration varied from 0.63 mgm−3 to 382.72 mgm−3, while the suspended particulate matter concentration varied from 1.02 gm−3 to 791.19 gm−3, with mineral fraction varying from 0 to 0.95. Depending on system and season, phytoplankton assemblages were dominated by cyanobacteria, green algae (Mamiellophyceae, Pyramimonadophyceae) or diatoms. The dataset is available from Castagna et al. (2022),

Alexandre Castagna et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2021-466', Bing Han, 30 Mar 2022
    • AC1: 'Reply on RC1', Alexandre Castagna, 09 May 2022
  • RC2: 'Comment on essd-2021-466', Arnold Dekker, 06 Apr 2022
    • AC2: 'Reply on RC2', Alexandre Castagna, 09 May 2022
  • RC3: 'Comment on essd-2021-466', Anonymous Referee #3, 07 Apr 2022
    • AC3: 'Reply on RC3', Alexandre Castagna, 09 May 2022