Fast Repetition Rate Fluorometry (FRRF) data collected on the RV L'Astrolabe from 11/11/2009 to 16/11/2009 (Dumont d'Urville - Hobart)

• Other Authors: AODN Data Manager (distributor), Andrew McMinn (hasPrincipalInvestigator), Data Officer (distributor), IMAS Data Manager (pointOfContact), Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) (hasAssociationWith), Integrated Marine Observing System (IMOS) (hasAssociationWith), McMinn, Andrew (hasPrincipalInvestigator), McMinn, Andrew, Prof. (hasPrincipalInvestigator)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: oceans; Countries | Australia; Global/Oceans | Southern Ocean; Continents | Antarctica; SEA SURFACE TEMPERATURE; EARTH SCIENCE; OCEAN TEMPERATURE; SALINITY; SALINITY/DENSITY; Fast Repetition Rate Fluorometer (FRRF); Maximum quantum yield (Fv/Fm); Photosynthesis; primary production; Biological Oceanography; EARTH SCIENCES; OCEANOGRAPHY; Marine and Estuarine Ecology (incl. Marine Ichthyology); BIOLOGICAL SCIENCES; ECOLOGY; Palaeoecology; Phycology (incl. Marine Grasses); PLANT BIOLOGY; L'Astrolabe {FHZI}; Latitude; Longitude; Minimum fluorescence in the light chamber of the FRRF (also used as a proxy for biomass); maximum fluorescence in the light chamber of the FRRF; variable fluorescence (FmL - FoL); maximum quantum yield of photosystem II ( (FmL - FoL) / FmL); functional absorption cross section of PSII (measure of the proportion of light harvested for photochemistry); connectivity between PSII reaction centres under actinic light; time constant of electron transport from PSII to PSI; Instrument's photomultiplier electronic sensitivity (1-256); Temperature of the water body; Practical salinity of the water body; Downwelling vector irradiance as photons (PAR wavelengths) in the water body; water temperature sensor; thermosalinographs; radiometers; Antarctic; Dumont d'Urville; Dumont-d'Urville; Psi; Southern Ocean; Antarc*; Antarctica; Institute for Marine and Antarctic Studies
• Online Access: https://researchdata.edu.au/fast-repetition-rate-durville-hobart/686056

Credit Australian Ocean Data Network (AODN) Credit Institute for Marine and Antarctic Studies (IMAS) These data were collected on the RV L'Astrolabe (platform code: FHZI) from 11/11/2009 to 16/11/2009 on a trip from Dumont D'Urville to Hobart. Maximum photochemical efficiency of photosystem II (PSII), also called maximum quantum yield of PSII (Fv/Fm), has become one of the most widely utilized fluorescence parameters in phytoplankton research. It represents the potential photochemical efficiency, which is the probability that the light energy captured by the photosynthetic apparatus is being utilized as photochemistry. Fv/Fm has been shown to have an instant response to variations in physical and chemical properties and is interpreted as a diagnostic of the overall health or competence of phytoplankton. Together with the absorption cross section area of PSII and chlorophyll concentration, it can be used to measure primary production (Cheah et al. 2011, Deep Sea Research). Seawater from 3 m depth was supplied continuously from the ship’s clean seawater line. FRR fluorescence yields were measured continuously at 1 minute intervals in dark-adapted state (! 15 minutes dark-adaptation) using a flash sequence consisting of a series of 100 subsaturation flashlets (1.1 μs flash duration and 2.8 μs interflash period) and a series of 20 relaxation flashlets (1.1 μs flash duration and 51.6 μs interflash period).