Wollschläger, Jochen; Henkel, Rohan; Voß, Daniela; Zielinski, Oliver (2020): Hyperspectral underwater light field measured during the cruise HE516 with RV HEINCKE. PANGAEA, https://doi.org/10.1594/PANGAEA.912033
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Data presented here were collected during the cruise HE516 with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany (July 17th, 2018 - August 15th, 2018). In total, 169 underwater light profiles were collected at 75 stations (with at least three repititions), using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 189, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 532) and a radiance sensor for upwelling radiance (Lu, SN 421). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 533). The sensors were calibrated by the manufacturer and validated prior to the cruise with a reference lamp. Data were recorded with the SatView software (V 2.9.5_7) and processed from raw to Level1, 1b, 2, 2s to Level 3a using the ProSoft Processing software (V 7.7.19_2). Measured data were binned in 0.5 m depth intervals. A dark correction was made automatically based on shutter measurements by the instrument. Measurements with a tilt higher than 10° were not taken into account during processing. Spectra were interpolated to 1 nm intervals. For each station the hyperspectral profiles for each parameter cover the wavelength range from 400-700 nm, for Ed and Es in [W/m² nm], for Lu in [W/m² nm sr]. For Ed, Lu and Es descriptive statistics are given including min, max, mean, median and standard deviation of the tilt and the photosynthetically active radiation PAR [µmol photons/m² s (sr)], integrated from 400 - 700 nm. Statistics are not given for profiles which do not reach the 1% PAR depth. To allow an assignment of above water conditions to the respective depth measurements, Es spectra were given as a function of depth, recalculated from data Level2s. The profiler measurements were only conducted during daylight. Raw data are available on request from the principal investigator.
Median Latitude: 53.885408 * Median Longitude: -3.572589 * South-bound Latitude: 48.911308 * West-bound Longitude: -11.556593 * North-bound Latitude: 58.734880 * East-bound Longitude: 7.988163
Date/Time Start: 2018-07-18T16:17:48 * Date/Time End: 2018-08-14T14:30:49
Datasets listed in this publication series
- Wollschläger, J; Henkel, R; Voß, D et al. (2020): Above water irradiance Es measured during the cruise HE516 with RV HEINCKE. https://doi.org/10.1594/PANGAEA.912030
- Wollschläger, J; Henkel, R; Voß, D et al. (2020): Downwelling irradiance Ed measured during the cruise HE516 with RV HEINCKE. https://doi.org/10.1594/PANGAEA.912029
- Wollschläger, J; Henkel, R; Voß, D et al. (2020): Upwelling radiance Lu measured during the cruise HE516 with RV HEINCKE. https://doi.org/10.1594/PANGAEA.912031