Hyperspectral underwater light field measured during the cruise MSM56 with RV MARIA S. MERIAN
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2020
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| _version_ | 1867169517656866816 |
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| author | Friedrichs, Anna Schwalfenberg, Kai Voß, Daniela Wollschläger, Jochen Zielinski, Oliver |
| author_facet | Friedrichs, Anna Schwalfenberg, Kai Voß, Daniela Wollschläger, Jochen Zielinski, Oliver |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Data presented here were collected during the cruise MSM56 with MARIA S MERIAN from Longyearbyen, Svalbard to Reykjavik, Iceland (July 2nd, 2016 - July 25th, 2016). In total, 133 underwater light profiles were collected at 68 stations (with at least three repititions), using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 143, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 392) and a radiance sensor for upwelling radiance (Lu, SN 323). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 393). The sensors were pre-calibrated by the manufacturer. 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 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. 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. Chief Scientist of MSM56: Dr. Koch, B. P., Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_917534 |
| institution | PANGAEA |
| language | en |
| publishDate | 2020 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Hyperspectral underwater light field measured during the cruise MSM56 with RV MARIA S. MERIAN Friedrichs, Anna Schwalfenberg, Kai Voß, Daniela Wollschläger, Jochen Zielinski, Oliver Arnarfjörður; Ed; Es; hyperspectral; ICBM; Iceland Sea; Institut für Chemie und Biologie des Meeres; irradiance; Kongsfjorden; Lu; North Greenland Sea; radiance; Scoresby Sound; underwater light field Data presented here were collected during the cruise MSM56 with MARIA S MERIAN from Longyearbyen, Svalbard to Reykjavik, Iceland (July 2nd, 2016 - July 25th, 2016). In total, 133 underwater light profiles were collected at 68 stations (with at least three repititions), using a free-falling hyperspectral light profiler. The system used was a SEABIRD HyperPro II (SN 143, former Satlantic), equipped with a irradiance sensor to measure downwelling irradiance (Ed, SN 392) and a radiance sensor for upwelling radiance (Lu, SN 323). A reference unit was attached to the ship to measure the above water irradiance (Es, SN 393). The sensors were pre-calibrated by the manufacturer. 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 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. 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. Chief Scientist of MSM56: Dr. Koch, B. P., Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research |
| title | Hyperspectral underwater light field measured during the cruise MSM56 with RV MARIA S. MERIAN |
| topic | Arnarfjörður; Ed; Es; hyperspectral; ICBM; Iceland Sea; Institut für Chemie und Biologie des Meeres; irradiance; Kongsfjorden; Lu; North Greenland Sea; radiance; Scoresby Sound; underwater light field |
| url | https://doi.org/10.1594/PANGAEA.917534 |