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Voß, Daniela; Henkel, Rohan; Wollschläger, Jochen; Zielinski, Oliver (2020): Hyperspectral underwater light field measured during the cruise SO267/2 with RV SONNE. PANGAEA, https://doi.org/10.1594/PANGAEA.912028

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Abstract:
Data presented here were collected during the cruise SO267/2 with RV SONNE from Suva, Fiji to Manzanillo, Mexico (January 28, 2019 - February 14, 2019). In total, 15 underwater light profiles were collected at 16 stations, using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 099, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 262) and a radiance sensor for upwelling radiance (Lu, SN 227). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 223). 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 1 m depth intervals. A dark correction was made automatically based on shutter measurements by the instrument. Measurements with a tilt higher than 5° 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. 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.
Keyword(s):
Ed; Es; hyperspectral; irradiance; Lu; Pacific Ocean; radiance; underwater light field
Coverage:
Median Latitude: 7.437819 * Median Longitude: -128.208132 * South-bound Latitude: -2.299167 * West-bound Longitude: -149.751783 * North-bound Latitude: 16.688650 * East-bound Longitude: -107.465950
Date/Time Start: 2019-02-03T20:33:17 * Date/Time End: 2019-02-13T15:30:29
Size:
3 datasets

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