Albinus, Michelle; Braun, Axel; Herold, Jens-Martin; Gerriets, Michaela; Geßner, Anna-Lena; Giebel, Helge-Ansgar; Meyer-Hagg, Lars; Meyerjürgens, Jens; Thölen, Claudia; Wollschläger, Jochen; Badewien, Thomas Henry (2025): Optical water quality variables (Secchi depth and Forel-Ule color indexes) observed during RV SENCKENBERG cruises SE202011-1, SE202103-1, SE202206-1, SE202208-1 and RV OTZUM cruise OT202103-1 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.980771
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Published: 2025-04-09 • DOI registered: 2025-05-08
Abstract:
Water clarity and color were observed during the RV SENCKENBERG cruises SE202011-1, SE202103-1, SE202206-1, SE202208-1 and RV OTZUM cruise OT202103-1 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:
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. 76251-17-5/19: Gute Küste Niedersachsen
Coverage:
Median Latitude: 53.765552 * Median Longitude: 7.820762 * South-bound Latitude: 53.503200 * West-bound Longitude: 7.589600 * North-bound Latitude: 53.916000 * East-bound Longitude: 8.801700
Date/Time Start: 2020-11-23T14:15:00 * Date/Time End: 2022-08-04T14:31:00
Event(s):
OT202103-1_P001A01 * Latitude: 53.782700 * Longitude: 7.840000 * Date/Time: 2021-03-17T11:48:00 * Campaign: OT202103-1 * Basis: Otzum * Method/Device: Secchi disk (SD)
OT202103-1_P002A01 * Latitude: 53.775100 * Longitude: 7.820500 * Date/Time: 2021-03-17T12:57:00 * Campaign: OT202103-1 * Basis: Otzum * Method/Device: Secchi disk (SD)
OT202103-1_P004A01 * Latitude: 53.791500 * Longitude: 7.824800 * Date/Time: 2021-03-18T13:45:00 * Campaign: OT202103-1 * Basis: Otzum * 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:
164 data points
Data
| 1 Event | 2 Date/Time | 3 Latitude | 4 Longitude | 5 z(SD) [m] | 6 FUI [#] |
|---|---|---|---|---|---|
| SE202011-1_Jade_1_01_a01 | 2020-11-23T14:15:00 | 53.7250 | 8.0634 | 0.60 | 15 |
| SE202011-1_Jade_2_01_a01 | 2020-11-23T15:11:00 | 53.7325 | 8.8017 | 0.80 | 15 |
| SE202011-1_Jade_3_02_a01 | 2020-11-24T08:12:00 | 53.7392 | 8.0424 | 0.80 | 13 |
| SE202011-1_Jade_4_02_a01 | 2020-11-24T09:17:00 | 53.7248 | 8.0426 | 0.20 | 17 |
| SE202011-1_Jade_1_03_a01 | 2020-11-24T10:03:00 | 53.7250 | 8.0634 | 0.50 | 15 |
| SE202011-1_Jade_2_03_a01 | 2020-11-24T11:24:00 | 53.7395 | 8.0803 | 0.80 | 15 |
| SE202011-1_Jade_3_03_a01 | 2020-11-24T12:17:00 | 53.7392 | 8.0424 | 0.50 | 15 |
| SE202011-1_Jade_4_01_a01 | 2020-11-24T13:05:00 | 53.7248 | 8.0426 | 0.50 | 15 |
| SE202011-1_Jade_3_02_a01 | 2020-11-25T08:12:00 | 53.7392 | 8.0424 | 0.80 | 13 |
| SE202011-1_Jade_4_02_a01 | 2020-11-25T09:17:00 | 53.7248 | 8.0426 | 0.20 | 17 |
| SE202011-1_Jade_1_03_a01 | 2020-11-25T10:03:00 | 53.7250 | 8.0634 | 0.50 | 15 |
| SE202011-1_Jade_2_03_a01 | 2020-11-25T11:24:00 | 53.7395 | 8.0803 | 0.80 | 15 |
| SE202011-1_Jade_3_03_a01 | 2020-11-25T12:17:00 | 53.7392 | 8.0424 | 0.50 | 15 |
| SE202011-1_Jade_4_03_a01 | 2020-11-25T13:05:00 | 53.7248 | 8.0426 | 0.50 | 15 |
| SE202103-1_P001 | 2021-03-08T13:35:00 | 53.8206 | 7.8824 | 1.25 | 14 |
| SE202103-1_P002 | 2021-03-08T14:02:00 | 53.8101 | 7.8700 | 1.00 | 15 |
| SE202103-1_P004 | 2021-03-09T07:02:00 | 53.7495 | 7.6741 | 0.90 | 16 |
| SE202103-1_P006 | 2021-03-09T08:00:00 | 53.7494 | 7.6734 | 0.80 | 16 |
| SE202103-1_P008 | 2021-03-09T09:01:00 | 53.7493 | 7.6733 | 0.80 | 16 |
| SE202103-1_P010 | 2021-03-09T10:02:00 | 53.9160 | 7.6731 | 1.00 | 15 |
| SE202103-1_P012 | 2021-03-09T11:01:00 | 53.7492 | 7.6731 | 0.80 | 15 |
| SE202103-1_P014 | 2021-03-09T12:00:00 | 53.7493 | 7.6731 | 1.00 | 14 |
| SE202103-1_P016 | 2021-03-09T12:59:00 | 53.7493 | 7.6731 | 1.20 | 14 |
| SE202103-1_P018 | 2021-03-09T13:59:00 | 53.7493 | 7.6731 | 1.40 | 14 |
| SE202103-1_P020 | 2021-03-09T14:59:00 | 53.7494 | 7.6732 | 1.40 | 13 |
| SE202103-1_P022 | 2021-03-09T16:00:00 | 53.7493 | 7.6741 | 1.00 | 14 |
| SE202103-1_P029 | 2021-03-10T09:01:00 | 53.7790 | 7.8291 | 1.30 | 13 |
| SE202103-1_P031 | 2021-03-10T10:00:00 | 53.7790 | 7.8290 | 1.50 | 13 |
| SE202103-1_P033 | 2021-03-10T11:01:00 | 53.7790 | 7.8289 | 1.10 | 14 |
| SE202103-1_P035 | 2021-03-10T12:01:00 | 53.7790 | 7.8290 | 1.00 | 14 |
| SE202103-1_P037 | 2021-03-10T13:00:00 | 53.7790 | 7.8292 | 1.30 | 14 |
| SE202103-1_P039 | 2021-03-10T14:01:00 | 53.7790 | 7.8290 | 1.50 | 12 |
| SE202103-1_P041 | 2021-03-10T14:59:00 | 53.7790 | 7.8291 | 1.50 | 13 |
| SE202103-1_P043 | 2021-03-10T15:59:00 | 53.7790 | 7.8290 | 1.50 | 12 |
| OT202103-1_P001A01 | 2021-03-17T11:48:00 | 53.7827 | 7.8400 | 0.10 | 17 |
| OT202103-1_P002A01 | 2021-03-17T12:57:00 | 53.7751 | 7.8205 | 0.10 | 17 |
| OT202103-1_P004A01 | 2021-03-18T13:45:00 | 53.7915 | 7.8248 | 0.60 | 15 |
| OT202103-1_P005A01 | 2021-03-18T14:07:00 | 53.7807 | 7.8277 | 0.30 | 17 |
| OT202103-1_P006A01 | 2021-03-18T14:33:00 | 53.7818 | 7.8363 | 0.50 | 15 |
| OT202103-1_P007A01 | 2021-03-18T15:14:00 | 53.7722 | 7.8423 | 0.30 | 17 |
| OT202103-1_P008A01 | 2021-03-19T13:04:00 | 53.7684 | 7.8443 | 0.40 | 17 |
| OT202103-1_P009A01 | 2021-03-19T15:17:00 | 53.7813 | 7.8318 | 0.40 | 15 |
| OT202103-1_P010 | 2021-03-19T15:34:00 | 53.7802 | 7.8257 | 0.40 | 17 |
| OT202103-1_P011 | 2021-03-22T07:20:00 | 53.7547 | 7.6591 | 0.20 | 17 |
| OT202103-1_P012 | 2021-03-22T07:36:00 | 53.7562 | 7.6505 | 0.20 | 16 |
| OT202103-1_P013 | 2021-03-22T08:00:00 | 53.7543 | 7.6461 | 0.20 | 16 |
| OT202103-1_P014 | 2021-03-22T09:33:00 | 53.7542 | 7.6627 | 0.40 | 16 |
| OT202103-1_P015 | 2021-03-22T09:51:00 | 53.7549 | 7.6553 | 0.40 | 15 |
| OT202103-1_P016 | 2021-03-22T10:05:00 | 53.7548 | 7.6483 | 0.40 | 15 |
| OT202103-1_P017 | 2021-03-22T12:23:00 | 53.7536 | 7.6644 | 0.30 | 17 |
| OT202103-1_P018 | 2021-03-22T12:48:00 | 53.7548 | 7.6541 | 0.30 | 17 |
| OT202103-1_P019 | 2021-03-22T13:12:00 | 53.7520 | 7.6510 | 0.30 | 17 |
| OT202103-1_P020 | 2021-03-22T09:50:00 | 53.7679 | 7.6447 | 0.40 | 18 |
| OT202103-1_P021 | 2021-03-22T10:59:00 | 53.7550 | 7.6491 | 0.50 | 15 |
| OT202103-1_P022 | 2021-03-23T11:23:00 | 53.5032 | 7.6560 | 0.50 | 16 |
| OT202103-1_P023 | 2021-03-23T11:51:00 | 53.7542 | 7.6632 | 0.50 | 16 |
| OT202103-1_P024 | 2021-03-23T12:20:00 | 53.7473 | 7.6839 | 0.55 | 19 |
| OT202103-1_P025 | 2021-03-24T10:40:00 | 53.7652 | 7.6458 | 0.60 | 17 |
| OT202103-1_P026 | 2021-03-24T12:16:00 | 53.7544 | 7.6453 | 1.00 | 15 |
| OT202103-1_P027 | 2021-03-24T12:38:00 | 53.7545 | 7.6558 | 0.70 | 17 |
| OT202103-1_P028 | 2021-03-24T13:00:00 | 53.7545 | 7.6629 | 0.70 | 17 |
| OT202103-1_P029 | 2021-03-24T14:15:00 | 53.7465 | 7.6826 | 0.80 | 16 |
| SE202206-1_SZ01_SD | 2022-06-30T11:05:00 | 53.7827 | 7.5922 | 3.00 | 12 |
| SE202206-1_SZ02_SD | 2022-06-30T11:35:00 | 53.8071 | 7.6121 | 5.00 | 10 |
| SE202206-1_SZ03_SD | 2022-06-30T13:01:00 | 53.7968 | 7.7196 | 2.00 | 11 |
| SE202206-1_SZ04_SD | 2022-06-30T13:40:00 | 53.8178 | 7.7329 | 3.00 | 9 |
| SE202206-1_SZ05_SD | 2022-06-30T15:05:00 | 53.8108 | 7.8696 | 2.00 | 9 |
| SE202206-1_SZ06_SD | 2022-06-30T15:40:00 | 53.8211 | 7.8737 | 2.00 | 9 |
| SE202206-1_SZ07_SD | 2022-06-30T17:05:00 | 53.7935 | 8.0037 | 2.00 | 13 |
| SE202206-1_SZ08_SD | 2022-06-30T17:36:00 | 53.8035 | 8.0226 | 1.50 | 10 |
| SE202208-1_SZD01_SD | 2022-08-03T12:04:00 | 53.7833 | 7.5896 | 1.00 | 17 |
| SE202208-1_SZD02_SD | 2022-08-03T06:31:00 | 53.8075 | 7.5943 | 1.00 | 16 |
| SE202208-1_SZD03_SD | 2022-08-03T07:07:00 | 53.7967 | 7.7188 | 2.00 | 15 |
| SE202208-1_SZD04_SD | 2022-08-03T08:16:00 | 53.8184 | 7.7346 | 4.00 | 13 |
| SE202208-1_SZD05_SD | 2022-08-03T09:34:00 | 53.8121 | 7.8741 | 2.00 | 17 |
| SE202208-1_SZD06_SD | 2022-08-03T11:14:00 | 53.8201 | 7.8847 | 3.00 | 17 |
| SE202208-1_BB06 | 2022-08-04T07:37:00 | 53.7721 | 7.9825 | 1.00 | 17 |
| SE202208-1_BB08 | 2022-08-04T08:29:00 | 53.7721 | 7.9825 | 1.50 | 17 |
| SE202208-1_BB10 | 2022-08-04T09:27:00 | 53.7721 | 7.9825 | 2.00 | 15 |
| SE202208-1_BB12 | 2022-08-04T10:27:00 | 53.7721 | 7.9825 | 2.00 | 14 |
| SE202208-1_BB14 | 2022-08-04T11:35:00 | 53.7721 | 7.9825 | 1.00 | 17 |
| SE202208-1_BB20 | 2022-08-04T14:31:00 | 53.7721 | 7.9825 | 2.00 | 17 |