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 2026 Continuous optical chlorophyll-a and turbidity data along RV MARIA S. MERIAN cruise MSM140/2 dataset https://doi.org/10.1594/PANGAEA.995185 2026-06-08T09:36:34 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 containers, as part of the "Reinseewassersystem" (RSWS). The containers measure alternatingly. While one container is measuring, the other one is being cleaned. The boxes switched generally every 6 hours. The water inlet for the RSWS is at about 6.5 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 time series was compared against Globcolour CHL1 and chlorophyll-a derived from above-water radiometry. Details on all quality control steps and the comparisons with satellite data and chlorophyll-a from radiometry can be found in the data processing report. The chlorophyll-a data were not calibrated using reference samples. Absolute values of this data set should be challenged. The data set user should keep in mind that some parts of the time series are likely 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 corrected chlorophyll-a and corrected turbidity data with corresponding quality flags. The data source is given through the name of the active container. The data set contains data during transit time and station work. We recommend to use ship's speed to filter for only transit data. Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 Bergmann Josy Frederick Jennica Hayo Lennéa jhayo@smail.uni-koeln.de Kinne Stefan stefan.kinne@mpimet.mpg.de Reischmann Lucas L.Reischmann@mpic.de Stammes Piet piet.stammes@knmi.nl Tuinder Olaf Wang Ping Windmiller Julia Ziegler Steffen Steffen.Ziegler@mpic.de 2026 Collecting Atmospheric Reference Data DowN in latitude leg, Cruise No. MSM140/2, 17.10.2025 - 05.11.2025, Brest (France) - Rio de Janeiro (Brazil) report MSM140/2 https://doi.org/10.48433/cr_msm140_2 45 pp Oelker Julia julia.oelker@uni-oldenburg.de 0000-0002-0783-3617 2026 Continuous optical chlorophyll-a and turbidity data along RV MARIA S. MERIAN cruise MSM140/2 - 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/140051/attachments/DAM_DataProcessingReport_MSM140-2.pdf -42.52132 -4.46186 -23.16361 48.38126 -25.82858045707046 12.60726137717636 2025-10-17T14:57:00 2025-11-05T05:59:00 6.5 6.5 horizontal profile AI_BaseCamp AI BaseCamp - Helmholtz DataHub Earth & Environment https://earth-data.de/about DAM_ResearchVessels DAM Marine Data - Research Vessels https://www.allianz-meeresforschung.de/en/activities/data-management-and-digitalisation/underway-research-data Bundesministerium für ­Forschung, Technologie und Raumfahrt BMFTR https://www.bmbf.de/DE/Home/home_node.html https://doi.org/10.13039/501100002347 03F1001C Auf- und Ausbau Dateninfrastruktur und -management für Daten aus dem Betrieb deutscher Forschungsschiffe; Vorhaben: Daten bio-optischer Sensoren https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F1001C MSM140/2_0_Underway-12 48.38126 -4.47676 2025-10-17T14:57:00 -23.08511 -42.52132 2025-11-05T05:59:00 MSM140/2 CARD-DN Brest, France 2025-10-17T00:00:00 Rio de Janeiro, Brazil 2025-11-05T00:00:00 Maria S. Merian https://en.wikipedia.org/wiki/RV_Maria_S._Merian DBBT 9274197 Oelker, Julia doi:10.48433/cr_msm140_2 https://download.pangaea.de/reference/138913/attachments/MSM140_2_nav.png doi:10.1594/PANGAEA.993340 Maria S. Merian https://en.wikipedia.org/wiki/RV_Maria_S._Merian DBBT 9274197 Fluorometer, Sea-Bird Scientific, ECO FLNTU https://bornhoeft.de/wp-content/uploads/2025/02/WetLabs-ECO-FLNTU.pdf fluorometers http://vocab.nerc.ac.uk/collection/L05/current/113/ optical backscatter sensors http://vocab.nerc.ac.uk/collection/L05/current/123/ Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLNTU combined fluorometer and turbidity sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL0215/ event was not logged in DSHIP 245725 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 https://bornhoeft.de/wp-content/uploads/2025/02/WetLabs-ECO-FLNTU.pdf fluorometers http://vocab.nerc.ac.uk/collection/L05/current/113/ optical backscatter sensors http://vocab.nerc.ac.uk/collection/L05/current/123/ Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLNTU combined fluorometer and turbidity sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL0215/ 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 https://bornhoeft.de/wp-content/uploads/2025/02/WetLabs-ECO-FLNTU.pdf fluorometers http://vocab.nerc.ac.uk/collection/L05/current/113/ optical backscatter sensors http://vocab.nerc.ac.uk/collection/L05/current/123/ Optical tools & radiometric sensors WET Labs {Sea-Bird WETLabs} ECO FLNTU combined fluorometer and turbidity sensor http://vocab.nerc.ac.uk/collection/L22/current/TOOL0215/ 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; 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 Chl a [µg/l] (corrected through sensor alig...) 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 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 chl a (corrected; 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, MC1 or MC2 MC (Active container, MC1 or MC2) 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 citable chlorophyll-a DAM Fluorescence turbidity Underway measurement DAMUnderwayResearchData author101897 author104725 author104727 author105637 author114596 author114597 author60965 author64006 author68996 author70649 author85921 award5127 basis650 campaign3395036 campaign52723 curlevel30 event3408970 funder22230 geocode1599 geocode1600 geocode1601 geocode1619 inst461 license21 method16398 method16404 method17589 param185091 param2136 param32561 param501843 param509052 param52477 pi60965 proclevel30 project5129 project5130 ref137617 ref140051 term1073131 term1073594 term2299476 term2299530 term2301068 term2301071 term2606205 term43792 term43863 term43876 term43975 term43980 term47459 term51596 term52591 term67649 term69214 term73731 term75910 term77692 term77900 topotype4