Pieck, Daniela; Thölen, Claudia; Voß, Daniela; Zielinski, Oliver; Becker, Marius (2024): Continuous optical measurements of absorbance via UV-process spectrophotometer ProPS along RV MARIA S. MERIAN cruise MSM97/2 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967383, In: Pieck, D et al. (2024): Continuous optical measurements of absorbance for the calculation of optical Nitrate along RV MARIA S. MERIAN cruise MSM97/2 [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.967381
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Abstract:
During R/V Maria S. Merian cruise MSM97/2 a sensor box (AddOn Box) was attached to a PocketFerryBox (4H Jena, Germany) in-line obtaining waters from the ships two autonomous measurement systems (RSWS). For the measurement of underway absorption spectra to calculate optical nitrate, the AddOn Box was equipped with two UV-process spectrophotometer (ProPS and OPUS, TriOS Mess- und Datentechnik GmbH, Germany). Data were recorded continuously in a ten-minute interval along the cruise track with an optical path length of 10 mm. The integration time was 256 ms. The ProPS photometer is equipped with a Deuterium lamp as light source whereas the OPUS photometer is equipped with a Xenon flash lamp. Baseline calibrations were done for both UV-photometer using ultrapure water. For the ProPS, the calibration was done in the laboratory before the cruise whereas the calibration for the OPUS was done by the manufacturer. The water inlet of the RSWS is allocated at approx. 6.5 m below the sea surface. While one box is measuring, the other box is being cleaned. The boxes switch after a user-defined measuring and cleaning interval. On MSM97/2, the boxes were alternating every 12 hours, including one short cleaning procedure during measurements after 4 hours. Absorption spectra obtained by the AddOn Box during the alternation process of the two RSWS, as well as during the internal cleaning procedure are not included. Spectra from station work are included. Within this dataset, absorption spectra were cut to a relevant wavelength range (from 189-360 nm (ProPS) and 199-360 nm (OPUS) to 210-260 nm). No further correction was done for the absorbance spectra in this processing step.
Keyword(s):
Related to:
Pieck, Daniela; Thölen, Claudia; Lehners, Carola; Voß, Daniela; Zielinski, Oliver: Reference measurements of surface waters during the RV MARIA S. MERIAN cruise MSM97/2. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.967466
References:
Frank, Carsten; Meier, Daniela; Voß, Daniela; Zielinski, Oliver (2014): Computation of nitrate concentrations in coastal waters using an in situ ultraviolet spectrophotometer: Behavior of different computation methods in a case study a steep salinity gradient in the southern North Sea. Methods in Oceanography, 9, 34-43, https://doi.org/10.1016/j.mio.2014.09.002
Zielinski, Oliver; Voß, Daniela; Saworski, B; Fiedler, Björn; Körtzinger, Arne (2011): Computation of nitrate concentrations in turbid coastal waters using an in situ ultraviolet spectrophotometer. Journal of Sea Research, 65(4), 456-460, https://doi.org/10.1016/j.seares.2011.04.002
Related code / software:
Meier, Daniela; Voß, Daniela; Zielinski, Oliver (2020): Matlab code for the computation of nitrate based on optical absorption measurements with UV-hyperspectral photometer (OPUS/TriOS). Zenodo, https://doi.org/10.5281/ZENODO.4091421
Coverage:
Median Latitude: 60.444216 * Median Longitude: 2.517145 * South-bound Latitude: 53.629557 * West-bound Longitude: -1.941989 * North-bound Latitude: 67.258604 * East-bound Longitude: 7.779832
Date/Time Start: 2020-12-13T10:10:00 * Date/Time End: 2020-12-22T18:30:00
Minimum DEPTH, water: 6.5 m * Maximum DEPTH, water: 6.5 m
Event(s):
MSM97/2_0_Underway-16 * Latitude Start: 54.656924 * Longitude Start: 7.733995 * Latitude End: 54.435320 * Longitude End: 7.189963 * Date/Time Start: 2020-12-13T10:10:00 * Date/Time End: 2020-12-22T18:30:00 * Campaign: MSM97/2 (GPF 20‐2_062) * Basis: Maria S. Merian * Method/Device: UV process spectrophotometer, TriOS Mess- und Datentechnik GmbH, ProPS [SN: D105] * Comment: event was not logged in DSHIP
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
46800 data points
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