Reference measurements of surface waters and optical water quality variables (Secchi depth and Forel-Ule color indexes) collected during two RV Otzum cruises along the river Elbe in 2012 and 2013
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2025
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| author | Pieck, Daniela Voß, Daniela Schulz, Anne-Christin Zielinski, Oliver |
| author_facet | Pieck, Daniela Voß, Daniela Schulz, Anne-Christin Zielinski, Oliver |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Reference measurements of surface waters were collected during two RV Otzum cruises along the river Elbe in 2012 and 2013 (Ot2012_05: 21.-24.05.; Ot2013_05: 27.-30.05.2013). Temperature [°C], salinity, turbidity [NTU], and chlorophyll from fluorescence [µg/L] were measured by a PocketFerrybox System (values given to the time of sampling). Water samples were taken from the outlet of the system. Suspended particular matter (SPM) and chlorophyll a (Chl a) were filtered onboard on glas fibre filters (GFF, 47mm, 0,7 µm) and frozen at -25°C and -80°C immediately after sampling. Values were determined in the lab after the cruise within 2 months, for SPM via gravimetric analysis (IOCC recommendations) and for Chl a according to EPA Method 445. Water clarity and color were observed using a white Secchi disc with a diameter of 30 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 tool 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 recommended in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010). Measurements were part of the project DOMsense (01.11.2011 - 31.05.2014, KF2866501DF1) |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_985197 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Reference measurements of surface waters and optical water quality variables (Secchi depth and Forel-Ule color indexes) collected during two RV Otzum cruises along the river Elbe in 2012 and 2013 Pieck, Daniela Voß, Daniela Schulz, Anne-Christin Zielinski, Oliver Chlorophyll a; DATE/TIME; DEPTH, water; Depth of Secchi Disk; Elbe; Elbe river; Event label; Fluorescence; Fluorometer, Turner Designs [EPA Method 445.0]; Forel-Ule index; Forel-Ule Index; Forel-Ule scale; Gravimetric analysis according to IOCCG (2021); LATITUDE; LONGITUDE; Optical water quality; Ot2012_05; Ot2012_5-1; Ot2012_5-10; Ot2012_5-11; Ot2012_5-12; Ot2012_5-2; Ot2012_5-3; Ot2012_5-4; Ot2012_5-5; Ot2012_5-6; Ot2012_5-7; Ot2012_5-8; Ot2012_5-9; Ot2013_05; Ot2013_5-1; Ot2013_5-10; Ot2013_5-11; Ot2013_5-12; Ot2013_5-13; Ot2013_5-14; Ot2013_5-15; Ot2013_5-16; Ot2013_5-17; Ot2013_5-18; Ot2013_5-19; Ot2013_5-2; Ot2013_5-20; Ot2013_5-21; Ot2013_5-22; Ot2013_5-23; Ot2013_5-24; Ot2013_5-25; Ot2013_5-26; Ot2013_5-27; Ot2013_5-28; Ot2013_5-29; Ot2013_5-3; Ot2013_5-30; Ot2013_5-31; Ot2013_5-32; Ot2013_5-33; Ot2013_5-34; Ot2013_5-4; Ot2013_5-5; Ot2013_5-6; Ot2013_5-7; Ot2013_5-8; Ot2013_5-9; Otzum; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; measured with Digital oceanographic thermometer, Sea-Bird Scientific, SBE38; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; measured with Fluorometer, Turner Designs, Cyclops-7; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; measured with Thermosalinograph, Sea-Bird Scientific, SBE45; river; Salinity; SD; Secchi depth; Secchi disk; SPM; Station label; Suspended particulate matter; Temperature, water; Turbidity (Nephelometric turbidity unit) Reference measurements of surface waters were collected during two RV Otzum cruises along the river Elbe in 2012 and 2013 (Ot2012_05: 21.-24.05.; Ot2013_05: 27.-30.05.2013). Temperature [°C], salinity, turbidity [NTU], and chlorophyll from fluorescence [µg/L] were measured by a PocketFerrybox System (values given to the time of sampling). Water samples were taken from the outlet of the system. Suspended particular matter (SPM) and chlorophyll a (Chl a) were filtered onboard on glas fibre filters (GFF, 47mm, 0,7 µm) and frozen at -25°C and -80°C immediately after sampling. Values were determined in the lab after the cruise within 2 months, for SPM via gravimetric analysis (IOCC recommendations) and for Chl a according to EPA Method 445. Water clarity and color were observed using a white Secchi disc with a diameter of 30 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 tool 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 recommended in literature (Garaba and Zielinski, 2015; Wernand, 2011; Wernand and van der Woerd, 2010). Measurements were part of the project DOMsense (01.11.2011 - 31.05.2014, KF2866501DF1) |
| title | Reference measurements of surface waters and optical water quality variables (Secchi depth and Forel-Ule color indexes) collected during two RV Otzum cruises along the river Elbe in 2012 and 2013 |
| topic | Chlorophyll a; DATE/TIME; DEPTH, water; Depth of Secchi Disk; Elbe; Elbe river; Event label; Fluorescence; Fluorometer, Turner Designs [EPA Method 445.0]; Forel-Ule index; Forel-Ule Index; Forel-Ule scale; Gravimetric analysis according to IOCCG (2021); LATITUDE; LONGITUDE; Optical water quality; Ot2012_05; Ot2012_5-1; Ot2012_5-10; Ot2012_5-11; Ot2012_5-12; Ot2012_5-2; Ot2012_5-3; Ot2012_5-4; Ot2012_5-5; Ot2012_5-6; Ot2012_5-7; Ot2012_5-8; Ot2012_5-9; Ot2013_05; Ot2013_5-1; Ot2013_5-10; Ot2013_5-11; Ot2013_5-12; Ot2013_5-13; Ot2013_5-14; Ot2013_5-15; Ot2013_5-16; Ot2013_5-17; Ot2013_5-18; Ot2013_5-19; Ot2013_5-2; Ot2013_5-20; Ot2013_5-21; Ot2013_5-22; Ot2013_5-23; Ot2013_5-24; Ot2013_5-25; Ot2013_5-26; Ot2013_5-27; Ot2013_5-28; Ot2013_5-29; Ot2013_5-3; Ot2013_5-30; Ot2013_5-31; Ot2013_5-32; Ot2013_5-33; Ot2013_5-34; Ot2013_5-4; Ot2013_5-5; Ot2013_5-6; Ot2013_5-7; Ot2013_5-8; Ot2013_5-9; Otzum; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; measured with Digital oceanographic thermometer, Sea-Bird Scientific, SBE38; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; measured with Fluorometer, Turner Designs, Cyclops-7; PocketFerryBox, 4H Jena Engineering, [SN: 751502]; measured with Thermosalinograph, Sea-Bird Scientific, SBE45; river; Salinity; SD; Secchi depth; Secchi disk; SPM; Station label; Suspended particulate matter; Temperature, water; Turbidity (Nephelometric turbidity unit) |
| url | https://doi.org/10.1594/PANGAEA.985197 |