Garaba, Shungudzemwoyo Pascal; Thölen, Claudia; Ferdelman, Timothy G; Zielinski, Oliver (2021): Optical water quality variables (Secchi disk depth and Forel-Ule colour indexes) observed during cruise M148/2 aboard RV METEOR [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.928943
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2021-03-10 • DOI registered: 2021-03-11
Abstract:
Optical water quality variables were recorded using a black and white Secchi disk with a diameter of 40 cm and a Forel-Ule colour scale. The Secchi disk depth was recorded as a relative measure of water clarity at each in situ station. At half the Secchi disk depth the apparent colour of the water above the submerged Secchi disk was determined using the Forel-Ule colour scale. A Forel-Ule colour 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 proposed in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010).
Further details:
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
Project(s):
Coverage:
Median Latitude: -12.491189 * Median Longitude: 4.265432 * South-bound Latitude: -22.994067 * West-bound Longitude: -8.749183 * North-bound Latitude: 0.665467 * East-bound Longitude: 14.051083
Date/Time Start: 2018-07-02T14:40:00 * Date/Time End: 2018-07-12T09:00:00
Minimum Elevation: -5669.4 m * Maximum Elevation: -114.2 m
Event(s):
M148/2_202-2 * Latitude: -22.994100 * Longitude: 14.051117 * Date/Time: 2018-07-02T14:41:00 * Elevation: -140.9 m * Campaign: M148/2 (EreBUS) * Basis: Meteor (1986) * Method/Device: Secchi disk (SD)
M148/2_203-2 * Latitude: -21.546283 * Longitude: 13.518750 * Date/Time: 2018-07-03T09:00:00 * Elevation: -114.2 m * Campaign: M148/2 (EreBUS) * Basis: Meteor (1986) * Method/Device: Secchi disk (SD)
M148/2_205-2 * Latitude: -18.999933 * Longitude: 12.164517 * Date/Time: 2018-07-04T08:13:00 * Elevation: -130.2 m * Campaign: M148/2 (EreBUS) * Basis: Meteor (1986) * Method/Device: Secchi disk (SD)
Comment:
We would like to thank RV Captain Detlef Korte and crew for supporting our research activities aboard RV METEOR during cruise M148/2. We are grateful of all the shore-based technicians, administrative personnel and scientists involved in the cruise. The German Federal Ministry of Education and Research (BMBF), Meteor Leitstelle, German National Science Foundation (DFG), Max Planck Society contributed towards the organization and funding of Meteor Expedition M148/2 EreBUS: Processes Controlling Greenhouse Gas Emissions from the Benguela Upwelling System.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Zielinski, Oliver | |||
| 2 | DATE/TIME | Date/Time | Zielinski, Oliver | Geocode | ||
| 3 | LATITUDE | Latitude | Zielinski, Oliver | Geocode | ||
| 4 | LONGITUDE | Longitude | Zielinski, Oliver | Geocode | ||
| 5 | Depth of Secchi Disk | z(SD) | m | Zielinski, Oliver | Secchi disc | |
| 6 | Forel-Ule index | FUI | # | Zielinski, Oliver | Forel-Ule scale |
License:
Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA-4.0)
Size:
24 data points