Oelker, Julia; Brandt, Angelika; Voß, Daniela; Wollschläger, Jochen: Continuous optical chlorophyll-a and turbidity data along R/V SONNE cruise SO293 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.968755 (dataset in review)
Abstract:
Underway optical chlorophyll-a and turbidity data were collected along the cruise track with Sea-Bird Scientific ECO FLNTU sensors installed within two autonomous measurement systems, called self-cleaning monitoring boxes (SMBs). The SMBs measure alternatingly. While one box is measuring, the other one is being cleaned. The boxes switched generally every 24 hours. The water inlet for the SMBs is at about 4 m depth. The data were quality controlled and the chlorophyll-a data were additionally calibrated by comparison with satellite matchups using the GlobColour CHL1 product. Calibration is based on satellite data, because no discrete water samples were collected on this expedition as reference. We note that a calibration with satellite data is not as accurate due to temporal and spatial mismatch between the underway and satellite data and due to uncertainty of the satellite product. The chlorophyll-a time series shows effects of non-photochemical quenching which was not corrected. The user may only want to use night-time data unaffected by non-photochemical quenching. Details on all quality control steps and the calibration plus discussion can be found in the data processing report. The resulting data set contains the original data and corresponding quality flags and, in case of chlorophyll-a, additionally the calibrated data plus quality flag. The data source is given through the name of the active SMB. The data set contains data during transect and station. We recommend to use ship's speed to filter for only transect data.
Related to:
Brandt, Angelika (2022): SO293 AleutBio (Aleutian Trench Biodiversity Studies) Cruise Report/Fahrtbericht, Cruise No. SO293, 24.07.2022 - 06.09.2022, Dutch Harbor (USA) - Vancouver (Canada). SONNE-Berichte, Begutachtungspanel Forschungsschiffe, SO293, 209 pp, https://doi.org/10.48433/cr_so293
Data processing report:
Oelker, Julia (2024): Continuous optical chlorophyll-A and turbidity data along R/V SONNE cruise SO293 - Data Processing Report. University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Center for Marine Sensors (ZfMars), Wilhelmshaven, Germany, DAM_DataProcessingReport_SO293.pdf
Documentation:
ACRI-ST; GlobColour Team (2020): GlobColour - Product User Guide. https://www.globcolour.info/CDR_Docs/GlobCOLOUR_PUG.pdf
Project(s):
DAM Underway Research Data (DAM_Underway)
Coverage:
Median Latitude: 52.322157 * Median Longitude: -163.501072 * South-bound Latitude: 48.228790 * West-bound Longitude: -174.711380 * North-bound Latitude: 54.629210 * East-bound Longitude: -123.009690
Date/Time Start: 2022-07-22T00:00:00 * Date/Time End: 2022-09-06T16:53:00
Minimum DEPTH, water: 4.0 m * Maximum DEPTH, water: 4.0 m
Event(s):
SO293_0_Underway-5 * Latitude Start: 54.035910 * Longitude Start: -166.597220 * Latitude End: 49.310590 * Longitude End: -123.121590 * Date/Time Start: 2022-07-22T00:00:00 * Date/Time End: 2022-09-06T16:53:00 * Campaign: SO293 (AleutBio) * Basis: Sonne_2 * Method/Device: Fluorometer, Sea-Bird Scientific, ECO FLNTU * Comment: event was not logged in DSHIP
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 2 (ProcLevel2)
Size:
479736 data points
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