10.1594/PANGAEA.995923Niedzwiedz, SarinaSarinaNiedzwiedz0000-0003-2604-2527University of BremenMurray, AylaAylaMurray0000-0002-9134-7768Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenBeckschulte, PaulaPaulaBeckschulteUniversity of BremenMonteiro, CátiaCátiaMonteiroCentro de Investigação em Biodiversidade e Recursos GenéticosRuiz, Micaela BelenMicaela BelenRuiz0000-0003-1278-8248Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenDescôteaux, RaphaëlleRaphaëlleDescôteauxUniversity Centre in SvalbardArmitage, PhoebePhoebeArmitageÅbo Akademi UniversityBoström, ChristofferChristofferBoström0000-0003-2845-8331Åbo Akademi UniversityHavermans, CharlotteCharlotteHavermans0000-0002-1126-4074Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, BremerhavenKuliński, KarolKarolKulińskiInstitute of Oceanology Polish Academy of SciencesBischof, KaiKaiBischof0000-0002-4497-1920University of BremenPANGAEA2026CTDLightSalinitySvalbardTemperatureturbidityWoodfjordenEvent labelStation IDLATITUDELONGITUDEDATE/TIMEDEPTH, waterReplicatesPressure, waterTemperature, waterConductivitySalinitySound velocity in waterDensity, sigma-theta (0)Turbidity (Nephelometric turbidity unit)Radiation, photosynthetically activeLight attenuation, verticalSpectrum peakMultiple investigationsCTD, Valeport, SWiFT CTDplus TurbidityHyperspectral UV-VIS Radiometer, TriOS, RAMSES-ACC-VIS2024-08-20T00:00:00/2024-08-26T00:00:00Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99590414048 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalData access is restricted (moratorium, sensitive data, license constraints)Environmental conditions along the fjord gradient of Woodfjorden, Svalbard were characterized in August 2024 at a total of ten sampling station using a SWiFT CTDplus turbidity probe (Valeport, St. Peters Quay, United Kingdom; n = 3 per station) to measure water temperature (°C), absolute salinity (SA), and turbidity (NTU). The CTD was lowered through the water column at a constant speed of approximately 1 m s⁻¹. Data were averaged over 1 m depth intervals. Spectrally resolved underwater irradiance (400–700 nm) was measured using a RAMSES-ACC-UV/VIS radiometer (TriOS Optical Sensor, Oldenburg, Germany) from the water surface to the seafloor (maximum depth 10 m; n = 3 per station). Photosynthetically active radiation (PAR) was calculated by integrating irradiance across the measured wavelength range. The light attenuation coefficient (Kd) was calculated between the surface and a water depth of 3 m. The spectral peak at a depth of 3 m was defined as the wavelength exhibiting the highest transmitted irradiance through the water column.13.25621714.25156779.32286779.70965WoodfjordenEuropean Commissionhttps://doi.org/10.13039/501100000780101136480Blue Carbon production, export and sequestration in emerging polar ecosystems (SEA-Quester)Horizon 2020 of the European Commissionhttps://doi.org/10.13039/501100007601869154The future of Arctic coastal ecosystems - Identifying transitions in fjord systems and adjacent coastal areas (FACE-IT)