Hyperspectral underwater light field measured during the cruise HE503 with RV HEINCKE


Data presented here were collected during the cruise HE503 with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany (February 21st, 2018 - March 3rd, 2018). In total, 63 underwater light profiles were collected at 46 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.

DOI https://doi.org/10.1594/PANGAEA.912073
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.912073
Creator Wollschläger, Jochen; Henkel, Rohan; Voß, Daniela; Zielinski, Oliver
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 2020
Funding Reference Ministry for Science and Culture of Lower Saxony
Rights Creative Commons Attribution 4.0 International
OpenAccess true
Language English
Resource Type Collection of Datasets
Format application/zip
Size 3 datasets
Discipline Earth System Research
Spatial Coverage (4.222W, 53.148S, 8.158E, 54.968N)
Temporal Coverage Begin 2018-02-22T08:02:57Z
Temporal Coverage End 2018-03-01T07:31:18Z