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| Main Authors: | , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2024
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| Online Access: | https://doi.org/10.1594/PANGAEA.973135 |
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| _version_ | 1867170127467773952 |
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| author | Oelker, Julia Rixen, Tim Janßen, Silke Martin, Bettina Voß, Daniela Wollschläger, Jochen |
| author_facet | Oelker, Julia Rixen, Tim Janßen, Silke Martin, Bettina Voß, Daniela Wollschläger, Jochen |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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 water inlet for the SMBs is at about 4 m below sea surface. Observed chlorophyll-a and turbidity data were both quality controlled and the chlorophyll-a data was additionally calibrated using chlorophyll-a reference data from discrete water samples taken from the CTD water sampler at 10 m depth. Sample chlorophyll-a was determined spectrophotometrically following Jeffrey and Humphrey (1975) as in EPA Method 446. Note that the ship crossed various biogeochemical provinces leading to high variability in the data and, additionally, non-photochemical quenching effects can be observed making it difficult to robustly calibrate the data. A comparison of the calibrated chlorophyll-a with satellite data using the GlobColour CHL1 and CHL2 products is additionally provided. Details on all quality control steps, the calibration, and the comparison with satellite data can be found in the data processing report. The resulting data set contains the original data, the calibrated data (in case of chlorophyll-a) and corresponding quality flags achieved by the quality control algorithm. The data source is given through the name of the active SMB. The data set contains data during transit time and station work. We recommend to use ship's speed to filter for only transit data. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_973135 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Continuous optical chlorophyll-a and turbidity data along R/V SONNE cruise SO285 Oelker, Julia Rixen, Tim Janßen, Silke Martin, Bettina Voß, Daniela Wollschläger, Jochen Chlorophyll a; chlorophyll-a; DAM; DAM_Underway; DAM Underway Research Data; DataHub; DataHub Earth and Environment of the Helmholtz Association; Data quality control procedures according to Copernicus Marine in situ TAC BGC quality control group (2021); DATE/TIME; DEPTH, water; Fluorescence; Fluorometer, Sea-Bird Scientific, ECO FLNTU; Fluorometer, Sea-Bird Scientific, ECO FLNTU; Calibration with samples measured according to Arar (1997) [EPA Method 446.0]; ICBM; LATITUDE; LONGITUDE; Measurement container; Quality flag, chlorophyll a; Quality flag, turbidity; Ship speed; SO285; SO285_0_Underway-6; Sonne_2; TRAFFIC; turbidity; Turbidity (Nephelometric turbidity unit); Underway Measurement 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 water inlet for the SMBs is at about 4 m below sea surface. Observed chlorophyll-a and turbidity data were both quality controlled and the chlorophyll-a data was additionally calibrated using chlorophyll-a reference data from discrete water samples taken from the CTD water sampler at 10 m depth. Sample chlorophyll-a was determined spectrophotometrically following Jeffrey and Humphrey (1975) as in EPA Method 446. Note that the ship crossed various biogeochemical provinces leading to high variability in the data and, additionally, non-photochemical quenching effects can be observed making it difficult to robustly calibrate the data. A comparison of the calibrated chlorophyll-a with satellite data using the GlobColour CHL1 and CHL2 products is additionally provided. Details on all quality control steps, the calibration, and the comparison with satellite data can be found in the data processing report. The resulting data set contains the original data, the calibrated data (in case of chlorophyll-a) and corresponding quality flags achieved by the quality control algorithm. The data source is given through the name of the active SMB. The data set contains data during transit time and station work. We recommend to use ship's speed to filter for only transit data. |
| title | Continuous optical chlorophyll-a and turbidity data along R/V SONNE cruise SO285 |
| topic | Chlorophyll a; chlorophyll-a; DAM; DAM_Underway; DAM Underway Research Data; DataHub; DataHub Earth and Environment of the Helmholtz Association; Data quality control procedures according to Copernicus Marine in situ TAC BGC quality control group (2021); DATE/TIME; DEPTH, water; Fluorescence; Fluorometer, Sea-Bird Scientific, ECO FLNTU; Fluorometer, Sea-Bird Scientific, ECO FLNTU; Calibration with samples measured according to Arar (1997) [EPA Method 446.0]; ICBM; LATITUDE; LONGITUDE; Measurement container; Quality flag, chlorophyll a; Quality flag, turbidity; Ship speed; SO285; SO285_0_Underway-6; Sonne_2; TRAFFIC; turbidity; Turbidity (Nephelometric turbidity unit); Underway Measurement |
| url | https://doi.org/10.1594/PANGAEA.973135 |