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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.973859 |
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| _version_ | 1867171893387198464 |
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| author | Oelker, Julia Achterberg, Eric Pieter Browning, Thomas J Voß, Daniela Wollschläger, Jochen Yuan, Zhongwei |
| author_facet | Oelker, Julia Achterberg, Eric Pieter Browning, Thomas J Voß, Daniela Wollschläger, Jochen Yuan, Zhongwei |
| 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 satellite matchups with the GlobColour CHL1 product. Reference data from water samples were collected by Niskin bottles of the CTD water sampler at 5 m depth or by a tow fish at 2-4 m depth during day time. Chlorophyll-a was determined onboard using a Turner fluorometer as well as in the lab on land via HPLC. The time series shows strong diel cycles connected to non-photochemical quenching. The phytoplankton fluorescence signal is reduced due to high light exposure. It was out of the scope of the applied processing routine to flag or correct for these effects. The daytime reference samples can therefore not be used for calibration of the chlorophyll-a fluorescence data (chlorophyll-a values based on manufacturer calibration). Satellite data was used instead. Details on all quality control steps, the calibration, and comparison with reference sample 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_973859 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Continuous optical chlorophyll-a and turbidity data along R/V SONNE cruise SO298 Oelker, Julia Achterberg, Eric Pieter Browning, Thomas J Voß, Daniela Wollschläger, Jochen Yuan, Zhongwei 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 according to Data processing report; GEOTRACES GP11; ICBM; LATITUDE; LONGITUDE; Measurement container; Quality flag, chlorophyll a; Quality flag, turbidity; Ship speed; SO298; SO298_0_Underway-8; Sonne_2; 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 satellite matchups with the GlobColour CHL1 product. Reference data from water samples were collected by Niskin bottles of the CTD water sampler at 5 m depth or by a tow fish at 2-4 m depth during day time. Chlorophyll-a was determined onboard using a Turner fluorometer as well as in the lab on land via HPLC. The time series shows strong diel cycles connected to non-photochemical quenching. The phytoplankton fluorescence signal is reduced due to high light exposure. It was out of the scope of the applied processing routine to flag or correct for these effects. The daytime reference samples can therefore not be used for calibration of the chlorophyll-a fluorescence data (chlorophyll-a values based on manufacturer calibration). Satellite data was used instead. Details on all quality control steps, the calibration, and comparison with reference sample 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 SO298 |
| 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 according to Data processing report; GEOTRACES GP11; ICBM; LATITUDE; LONGITUDE; Measurement container; Quality flag, chlorophyll a; Quality flag, turbidity; Ship speed; SO298; SO298_0_Underway-8; Sonne_2; turbidity; Turbidity (Nephelometric turbidity unit); Underway Measurement |
| url | https://doi.org/10.1594/PANGAEA.973859 |