Albinus, Michelle; Thölen, Claudia; Herold, Jens-Martin; Lehners, Carola; Wurl, Oliver; Badewien, Thomas H (2024): Optical water quality variables (Secchi depth and Forel-Ule color indexes) observed during RV HEINCKE cruise HE626-2 from Bremerhaven, Germany to Bremerhaven, Germany [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.973129
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Abstract:
Water clarity and color were observed during the RV HEINCKE cruise HE626-2 (27.10.2023 - 01.11.2023, Wilhelmshaven, Germany - Wilhelmshaven, Germany) using a white Secchi disc with a diameter of 40 cm and a Forel-Ule color scale. The Secchi depth (SD) was recorded as a relative measure of water clarity at each in situ station during day time. At half SD the apparent color of the water above the submerged Secchi disc was determined using the Forel-Ule color scale. A Forel-Ule color scale is a classic tools used to differentiate the percieved color of water based on a scale from 1 (indigo blue) to 21 (cola brown). The measurements were conducted as recemmend in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010).
Keyword(s):
Related to:
Albinus, Michelle; Deyle, Lisa; Hentschel, Isabell; Herold, Jens-Martin; Lübben, Neeske; Schneider, Janina; Wurl, Oliver; Badewien, Thomas H (2024): Optical water quality variables (Secchi depth and Forel-Ule color indexes) observed during RV HEINCKE cruise HE609 from Bremerhaven, Germany to Bremerhaven, Germany [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.973124
Garaba, Shungudzemwoyo Pascal; Zielinski, Oliver (2015): An assessment of water quality monitoring tools in an estuarine system. Remote Sensing Applications: Society and Environment, 2, 1-10, https://doi.org/10.1016/j.rsase.2015.09.001
Wernand, Marcel Robert (2011): Poseidon's paintbox : historical archives of ocean colour in global-change perspective [dissertation]. Utrecht University, 240, https://dspace.library.uu.nl/handle/1874/212589
Wernand, Marcel Robert; van der Woerd, Hendrik J (2010): Spectral analysis of the Forel-Ule ocean colour comparator scale. Journal of the European Optical Society-Rapid Publications, 5, 10014s, https://doi.org/10.2971/jeos.2010.10014s
Funding:
Niedersächsisches Ministerium für Wissenschaft und Kultur, grant/award no. VWZN3685: Saimidris: Sailing Intelligent Micro Drifter Swarms
Coverage:
Median Latitude: 53.804160 * Median Longitude: 7.700280 * South-bound Latitude: 53.539800 * West-bound Longitude: 7.568100 * North-bound Latitude: 53.880700 * East-bound Longitude: 8.182300
Date/Time Start: 2023-10-28T07:45:00 * Date/Time End: 2023-10-29T07:10:00
Minimum Elevation: -20.0 m * Maximum Elevation: -17.0 m
Event(s):
HE626/2_5-2 * Latitude: 53.867024 * Longitude: 7.568132 * Date/Time: 2023-10-28T07:45:44 * Elevation: -18.0 m * Location: North Sea * Campaign: HE626/2 (SCANS; Gerätetest) * Basis: Heincke * Method/Device: Secchi disk (SD)
HE626/2_5-7 * Latitude: 53.868163 * Longitude: 7.578757 * Date/Time: 2023-10-28T08:42:31 * Elevation: -19.0 m * Location: North Sea * Campaign: HE626/2 (SCANS; Gerätetest) * Basis: Heincke * Method/Device: Secchi disk (SD)
HE626/2_5-12 * Latitude: 53.880664 * Longitude: 7.598064 * Date/Time: 2023-10-28T10:40:47 * Elevation: -20.0 m * Location: North Sea * Campaign: HE626/2 (SCANS; Gerätetest) * Basis: Heincke * Method/Device: Secchi disk (SD)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Albinus, Michelle | |||
| 2 | DATE/TIME | Date/Time | Albinus, Michelle | Geocode | ||
| 3 | LATITUDE | Latitude | Albinus, Michelle | Geocode | ||
| 4 | LONGITUDE | Longitude | Albinus, Michelle | Geocode | ||
| 5 | Depth of Secchi Disk | z(SD) | m | Albinus, Michelle | Secchi disk (SD) | |
| 6 | Forel-Ule index | FUI | # | Albinus, Michelle | Forel-Ule scale |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
10 data points