Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Gaye Birgit birgit.gaye@uni-hamburg.de 0000-0002-5057-899X Universität Hamburg UHH http://www.uni-hamburg.de https://ror.org/00g30e956 Waniek Joanna J joanna.waniek@io-warnemuende.de http://www.io-warnemuende.de/homepages/waniek/ 0000-0003-3724-073X Leibniz Institute for Baltic Sea Research, Warnemünde IOW https://www.io-warnemuende.de/en_index.html https://ror.org/03xh9nq73 2026 Continuous optical chlorophyll-a and turbidity data along RV SONNE cruise SO303 dataset https://doi.pangaea.de/10.1594/PANGAEA.995183 2026-06-19T07:23:15 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 boxes switched generally every 6 hours. The water inlet for the SMBs is at about 4 m below sea surface. Observed chlorophyll-a and turbidity data were both quality controlled. Analysis of the chlorophyll-a and turbidity data during parallel operation of the sensors in the two boxes showed significant differences between the sensors. The sensors were aligned resulting in consistent chlorophyll-a and turbidity time series. The corrected chlorophyll-a data were calibrated based on chlorophyll-a values from discrete water samples taken from the underway system and measured fluorometrically in the lab. The turbidity time series was compared against suspended particulate matter (SPM) from surface water samples taken from Niskin bottles of the CTD frame and determined gravimetrically in the lab. Correlation between turbidity and sample SPM was poor. The calibrated chlorophyll-a time series and corrected turbidity time series were compared against Globcolour CHL1 and TSM products, respectively. Details on all quality control steps and the comparison with satellite data can be found in the data processing report. The data set user should keep in mind that some parts of the time series might be affected by non-photochemical quenching, see data processing report. It was out of the scope of the quality control to flag or correct non-photochemical quenching. The resulting data set contains the original data and corresponding quality flags achieved by the quality control algorithm as well as the calibrated chlorophyll-a and corrected turbidity data with corresponding quality flags. 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. Gaye Birgit birgit.gaye@uni-hamburg.de 0000-0002-5057-899X Andersch Tjark Bartsch Peggy Cosmus Hannes Dähnke Kirstin kirstin.daehnke@hereon.de 0000-0001-5133-7082 Dasbach Dorothee Eisnecker Paula Gök Irmak Harms Natalie natalie.harms@uni-hamburg.de 0000-0003-3404-7846 Hubert-Huard Raphaël Hüge Fabian John Finn Keuter Sabine Kretzschmann Lisett lisett.kretzschmann@bsh.de Lahajnar Niko niko.lahajnar@uni-hamburg.de Lisitano Luisa Lüdmann Thomas thomas.luedmann@uni-hamburg.de https://www.geo.uni-hamburg.de/en/geologie/personen/luedmann-thomas.html 0000-0001-6847-5502 Markfort Greta Meiritz Luisa Chiara 0009-0003-1957-6050 Oldhaver Manja Penopp Jan Prien Ralf D ralf.prien@io-warnemuende.de http://www.io-warnemuende.de/ralf-prien-en.html 0000-0003-3014-792X Rixen Tim tim.rixen@leibniz-zmt.de 0000-0001-8376-891X Ruda Luise Sanders Tina Tina.Sanders@hereon.de 0000-0002-3692-1800 Schulz Gesa gesa.schulz@uni-hamburg.de 0000-0002-6689-767X Schulz Hartmut hartmut.schulz@uni-tuebingen.de https://www.uni-tuebingen.de/en/faculties/faculty-of-science/departments/geosciences/arbeitsgruppen/palaeobiology/research-area/micropaleontology/working-group/members/hartmut-schulz.html Siccha Michael msiccha@marum.de 0000-0002-2039-5535 Sommer Marcel Sorge Yves Waniek Joanna J joanna.waniek@io-warnemuende.de http://www.io-warnemuende.de/homepages/waniek/ 0000-0003-3724-073X 2024 BIOGeochemistry in the equatorial INdian Ocean - BIOGIN-IIOE2, Cruise No. SO303, 23.01.2024 - 19.02.2024, La Réunion (France) - Colombo (Sri Lanka) report SONNE-Berichte, Begutachtungspanel Forschungsschiffe SO303 https://doi.org/10.48433/cr_so303 81 pp Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 2026 Continuous optical chlorophyll-a and turbidity data along R/V SONNE cruise SO303 - Data Processing Report report Institute for Chemistry and Biology of the Marine Environment (ICBM), School of Mathematics and Science, Carl von Ossietzky Universität Oldenburg https://download.pangaea.de/reference/140048/attachments/DAM_DataProcessingReport_SO303.pdf 2017 Guidelines for measuring chlorophyll a other Baltic Marine Environment Protection Commission - Helsinki Commission (HELCOM) https://helcom.fi/publications/guidelines-for-measuring-chlorophyll-a/ 51.67094 80.11346 -23.20423 7.08016 65.86761648432942 -9.938375321001258 2024-01-10T00:00:00 2024-02-19T06:50:00 4.0 4.0 horizontal profile DAM_Underway DAM Underway Research Data https://www.allianz-meeresforschung.de/kernbereiche/datenmanagement-und-digitalisierung#unterwegs DataHub DataHub Earth and Environment of the Helmholtz Association https://helmholtz.software/projects/datahub SO303_0_Underway-7 -20.16448 57.42496 2024-01-10T00:00:00 6.9606 79.85565 2024-02-19T06:50:00 SO303 SO303 BIOGIN (IIEO2) BIOGIN (IIEO2) Port Louis 2024-01-23T00:00:00 2024-01-23 Colombo, Sri Lanka 2024-02-19T00:00:00 2024-02-19 Sonne_2 https://uol.de/icbm/forschungsplattformen-schiffe/sonne DBBE 9633927 Gaye, Birgit Gaye, Birgit doi:10.48433/cr_so303 20240014 https://download.pangaea.de/reference/125471/attachments/SO303_nav.png doi:10.1594/PANGAEA.967558 Sonne_2 https://uol.de/icbm/forschungsplattformen-schiffe/sonne DBBE 9633927 Fluorometer, Sea-Bird Scientific, ECO FLNTU Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLBB scattering fluorescence sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL1361/ event was not logged in DSHIP 452461 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ DATE/TIME Date/Time http://en.wikipedia.org/wiki/ISO_8601 Time T http://dbpedia.org/resource/Time Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Date/Time LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Latitude LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Longitude DEPTH, water Depth water m depth http://purl.obolibrary.org/obo/PATO_0001595 water http://purl.obolibrary.org/obo/CHEBI_15377 Length L http://dbpedia.org/resource/Length Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Depth water [m] Ship speed Ship sp kn Linear Velocity http://dbpedia.org/resource/Velocity Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Ship sp [kn] Chlorophyll a Chl a µg/l hdl:10013/epic.32187.d001 chlorophyll a http://purl.obolibrary.org/obo/CHEBI_18230 Density http://dbpedia.org/resource/Density Fluorometer, Sea-Bird Scientific, ECO FLNTU Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLBB scattering fluorescence sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL1361/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Chl a [µg/l] (Fluorometer, Sea-Bird Scienti...) Quality flag, chlorophyll a QF chl a chlorophyll a http://purl.obolibrary.org/obo/CHEBI_18230 Data quality control procedures according to Copernicus Marine in situ TAC BGC quality control group (2021) https://archimer.ifremer.fr/doc/00251/36232/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 QC flag meanings: 0:no QC, 1:good, 2:probably good, 3:probably bad, 4:bad, 5-7:not used, 8:interpolated, 9:missing QF chl a (QC flag meanings: 0:no QC, 1:...) Turbidity (Nephelometric turbidity unit) Turbidity NTU https://en.wikipedia.org/wiki/Turbidity Turbidity http://dbpedia.org/resource/Turbidity Fluorometer, Sea-Bird Scientific, ECO FLNTU Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLBB scattering fluorescence sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL1361/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Turbidity [NTU] (Fluorometer, Sea-Bird Scienti...) Quality flag, turbidity QF turbidity Turbidity http://dbpedia.org/resource/Turbidity Data quality control procedures according to Copernicus Marine in situ TAC BGC quality control group (2021) https://archimer.ifremer.fr/doc/00251/36232/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 QC flag meanings: 0:no QC, 1:good, 2:probably good, 3:probably bad, 4:bad, 5-7:not used, 8:interpolated, 9:missing QF turbidity (QC flag meanings: 0:no QC, 1:...) Chlorophyll a Chl a µg/l hdl:10013/epic.32187.d001 chlorophyll a http://purl.obolibrary.org/obo/CHEBI_18230 Density http://dbpedia.org/resource/Density Fluorometer, Sea-Bird Scientific, ECO FLNTU; Calibration according to Data processing report Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLBB scattering fluorescence sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL1361/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 calibrated with discrete samples Chl a [µg/l] (calibrated with discrete samp...) Quality flag, chlorophyll a QF chl a chlorophyll a http://purl.obolibrary.org/obo/CHEBI_18230 Data quality control procedures according to Copernicus Marine in situ TAC BGC quality control group (2021) https://archimer.ifremer.fr/doc/00251/36232/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 calibrated; QC flag meanings: 0:no QC, 1:good, 2:probably good, 3:probably bad, 4:bad, 5-7:not used, 8:interpolated, 9:missing QF chl a (calibrated; QC flag meanings:...) Turbidity (Nephelometric turbidity unit) Turbidity NTU https://en.wikipedia.org/wiki/Turbidity Turbidity http://dbpedia.org/resource/Turbidity Fluorometer, Sea-Bird Scientific, ECO FLNTU; Sensor alignment correction according to Data Processing Report Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLBB scattering fluorescence sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL1361/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 corrected through sensor alignment Turbidity [NTU] (corrected through sensor alig...) Quality flag, turbidity QF turbidity Turbidity http://dbpedia.org/resource/Turbidity Data quality control procedures according to Copernicus Marine in situ TAC BGC quality control group (2021) https://archimer.ifremer.fr/doc/00251/36232/ Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 corrected; QC flag meanings: 0:no QC, 1:good, 2:probably good, 3:probably bad, 4:bad, 5-7:not used, 8:interpolated, 9:missing QF turbidity (corrected; QC flag meanings: ...) Measurement container MC Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Active container, SMB_A or SMB_B MC (Active container, SMB_A or SMB_B) CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels ProcLevel2 PANGAEA data processing level 2 https://wiki.pangaea.de/wiki/Processing_levels#PANGAEA_data_processing_level_2 chlorophyll-a DAM Fluorescence turbidity Underway measurement DAMUnderwayResearchData author101779 author101789 author105300 author105301 author105302 author105303 author105304 author105305 author105306 author105307 author105308 author105309 author10613 author20312 author21572 author24754 author26756 author32282 author35419 author37102 author37132 author37202 author56180 author58619 author60965 author67785 author692 author70938 author77271 author94212 author97917 author97919 basis5064 campaign3373851 campaign49447 curlevel30 event3408968 geocode1599 geocode1600 geocode1601 geocode1619 inst21210 inst461 inst49 journal17181 license21 method16398 method16404 method16818 method17589 param185091 param2136 param32561 param501843 param509052 param52477 pi60965 proclevel30 project4399 project5026 ref125490 ref140048 ref140049 term1073131 term1073594 term2301071 term2606205 term43792 term43863 term43876 term43975 term43980 term47459 term51596 term52591 term67649 term69214 term73731 term75910 term77639 term77723 topotype4