Photosynthetically active radiation measured in different water depths near the island of Helgoland in summer 2014


In-situ photosynetically active radiation (PAR) was measured in different depths (1.2, 2.9, 4.4, 6.6 m) every 10-15 min during summer 2014. Odyssey PAR loggers were calibrated against a cosine-corrected planar PAR sensor (LI-190SA quantum sensor, LI-COR Inc., USA) over a 24 h period at 4 m depth in the Helgolandic South harbor. During the Laminaria hyperborea sampling period (seven weeks), incoming PAR was recorded continuously every 15 min at 1.2 and 2.9 m, and every 30 min at 4.4 and 6.6 m near the sampling area of sporophytes. To avoid biofouling of the sensor heads, PAR loggers were cleaned every week (1.2 m) or every second week (all other depths) by SCUBA divers.

Additional funding was provided by the Postdoctoral fellowship grant of the Fonds de recherche du Québec - Nature et technologies and the Weston Foundation.

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Metadata Access
Creator Franke, Kiara ORCID logo; Matthes, Lisa C ORCID logo; Graiff, Angelika ORCID logo; Karsten, Ulf ORCID logo; Bartsch, Inka ORCID logo
Publisher PANGAEA
Publication Year 2023
Funding Reference Deutsche Forschungsgemeinschaft, Bonn Crossref Funder ID 407670545 Seasonal kelp primary production at a rocky shore site: Integrating physiology and biochemistry into ecological modelling
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 32370 data points
Discipline Earth System Research
Spatial Coverage (7.878W, 54.193S, 7.879E, 54.194N); off Helgoland, North Sea
Temporal Coverage Begin 2014-07-17T15:15:00Z
Temporal Coverage End 2014-09-12T09:30:00Z