PANGAEA_995667 Underway sensors data along southeast Greenland during MARIA S. MERIAN cruise MSM130 Esposito, Mario; Hopwood, Mark James; Ruan, Yaqing; Achterberg, Eric Pieter Underway sensors data along southeast Greenland during MARIA S. MERIAN cruise MSM130 2026-07-04 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.995667 Investigator Mario Esposito mesposito@geomar.de Earth Science DATE/TIME LATITUDE LONGITUDE Speed Course Temperature, water Salinity Turbidity (Nephelometric turbidity unit) Chlorophyll a Temperature, air Wind speed Wind direction Conductivity DEPTH, water Sensor depth Oxygen saturation Oxygen, dissolved Total dissolved solids Chlorophyll b Nitrate pH Carbon dioxide, partial pressure geoscientificInformation fjords MSM130 MSM130-track southeast Greenland Underway cruise track measurements Underway measurement CTD, SEA-BIRD SBE 45 Fluorometer, WET Labs FLNTU, SN 773 Humidity/temperature transmitter, E+E Elektronik, EE33 [SN: 18289372009467] Wind sensor, Lufft, Ventus [SN: 311.1122.0901.065] Multi-Parameter Water Quality Sonde, YSI EXO1 UV process spectrophotometer, TriOS Mess- und Datentechnik GmbH, OPUS [SN: 7138] pH Logger (AquapHOx-LX), Pyroscience pH sensor SAMI-pH, Sunburst Sensors Carbon dioxide sensor, -4H- JENA engineering GmbH, CONTROS HydroC® CO₂ Maria S. Merian 2024-07-09 2024-08-13 Complete 60.2778786 66.32597778 -44.15987842 -22.39664723 6.5 m (DEPTH, water) 6.5 m (DEPTH, water) DAM_Underway DAM Underway Research Data DataHub DataHub Earth and Environment of the Helmholtz Association unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 1123793 data points text/tab-separated-values Achterberg, Eric Pieter; Hopwood, Mark James; Bogner, Boie; Wilstermann, Carmen; Schreiber, Lennart; Jin, Xuewei; Huang, Xin; Cloete, Ryan; Burmester, Anne; Frankholz, Lisa; Trudonowska, Emilia; Camin, Capucine; Patteri Vijayan, Apsara; Brinkmann, Inda; Esposito, Mario; Zimmermann, Heike Hildegard; Guo, Yuping; Marin Arias, Camila; Stryj, Malte; Streuff, Katharina Teresa; Taenzer, Lukas; Oliver, Hilde (2024): Investigating connectivity between Arctic freshwater outflow, Atlantic biogeochemistry and AMOC, Cruise No. MSM130, July 9 - August 14 2024, Reykjavik (Iceland) - Reykjavik (Iceland). MARIA S. MERIAN-Berichte, Begutachtungspanel Forschungsschiffe, MSM130, 65 pp, https://doi.org/10.48433/cr_msm130 Takahashi, Taro; Ólafsson, Jón; Goddard, J G; Chipman, D W; Sutherland, Stewart C (1993): Seasonal variation of CO2 and nutrient salts over the high latitude oceans: A comparative study. Global Biogeochemical Cycles, 7(4), 843-878, https://doi.org/10.1029/93GB02263 Fietzek, Peer; Fiedler, Björn; Steinhoff, Tobias; Körtzinger, Arne (2014): In situ Quality Assessment of a Novel Underwater pCO2 Sensor Based on Membrane Equilibration and NDIR Spectrometry. Journal of Atmospheric and Oceanic Technology, 31(1), 181-196, https://doi.org/10.1175/JTECH-D-13-00083.1 Geißler, Felix; Mutzberg, André; Müller, Jens Daniel; Achterberg, Eric Pieter; Borisov, Sergey M; Klimant, I (2018): A versatile optode system for oxygen, carbon dioxide, and pH measurements in seawater with integrated battery and logger. Limnology and Oceanography-Methods, 16(7), 459-473, https://doi.org/10.1002/lom3.10260 Liu, Xuewu; Byrne, Robert H (2011): Purification and Characterization of meta-Cresol Purple for Spectrophotometric Seawater pH Measurements. Environmental Science & Technology, 45(11), 4862-4868, https://doi.org/10.1021/es200665d Nehir, Münevver; Esposito, Mario; Begler, Christian; Frank, Carsten; Zielinski, Oliver; Achterberg, Eric Pieter (2021): Improved Calibration and Data Processing Procedures of OPUS Optical Sensor for High-Resolution in situ Monitoring of Nitrate in Seawater. Frontiers in Marine Science, 8, 663800, https://doi.org/10.3389/fmars.2021.663800

Underway sensors data collected during Maria S. Merian cruise MSM130 ('Polar Beast') in July-August 2024 across the southeast Greenland shelf and three fjord systems. Measurements include ship-specific data, hydrological data and meteorological data downloaded from the Merian DSHIP system at 1 min resolution. An additional sensor suite was immersed into an onboard water tank supplied with seawater from approximately 6.5 m. The suite of sensors included a multiparameter EXO1 Sonde for measurements of temperature, salinity and dissolved oxygen, a VLux AlgaePro fluorometer for chlorophyll a and b, an Opus nitrate sensor, two sensors – SAMI and AquapHOx-L - for colorimetric and optical measurements of pH, respectively and an HydroC sensor for pCO2 measurements. The EXO1 oxygen probe was calibrated prior to the cruise using one-point air saturated water. The temperature offset compared to ship temperature is due to the warming up of the seawater flowing through the pipelines from the seawater inlet to the onboard water tank. Chlorophyll a and b data from Vlux are reported corrected according to manufacturer calibration. Nitrate data from OPUS sensor were processed according to Nehir et al, 2021. An offset of 6 µM was applied based on spectrophotometric measured nitrate concentrations on discrete water samples. pH data from AquapHOx sensor were processed using Pyro WorkBench software. A 3 point calibration was performed prior to deployment using custom-made pH buffer solutions. Details on data processing procedures can be found in Staudinger et al., 2018. Raw absorbance data from SAMI-pH were corrected for sample salinity and converted to pH (total scale) using QC_pH standalone Matlab program. Details on data processing procedures can be found in Liu et al., 2011. Meta-cresol purple (mCP) used in the SAMI sensor was purified according to Liu et al, 2011. Mole fraction CO2 data from the HydroC sensor were processed according to Fietzek et al, 2014 to account for the pressure behind the membrane in the sensor's gas stream and converted to in-situ pCO2 (in µatm) according to Takahashi et al., 1993. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.995667"!

http://en.wikipedia.org/wiki/ISO_6709 LATITUDE http://en.wikipedia.org/wiki/ISO_6709 LONGITUDE http://en.wikipedia.org/wiki/ISO_8601 DATE/TIME http://www.seabird.com/wetlabs Fluorometer, WET Labs FLNTU, SN 773 https://doi.org/10.1002/lom3.10260 A versatile optode system for oxygen, carbon dioxide, and pH measurements in seawater with integrated battery and logger https://doi.org/10.1021/es200665d Purification and Characterization of meta-Cresol Purple for Spectrophotometric Seawater pH Measurements https://doi.org/10.1029/93GB02263 Seasonal variation of CO2 and nutrient salts over the high latitude oceans: A comparative study https://doi.org/10.1175/JTECH-D-13-00083.1 In situ Quality Assessment of a Novel Underwater pCO2 Sensor Based on Membrane Equilibration and NDIR Spectrometry https://doi.org/10.3389/fmars.2021.663800 Improved Calibration and Data Processing Procedures of OPUS Optical Sensor for High-Resolution in situ Monitoring of Nitrate in Seawater https://doi.org/10.48433/cr_msm130 Investigating connectivity between Arctic freshwater outflow, Atlantic biogeochemistry and AMOC, Cruise No. MSM130, July 9 - August 14 2024, Reykjavik (Iceland) - Reykjavik (Iceland) https://en.wikipedia.org/wiki/RV_Maria_S._Merian Maria S. Merian https://en.wikipedia.org/wiki/Turbidity Turbidity (Nephelometric turbidity unit) https://hdl.handle.net/10013/epic.32187.d001 Chlorophyll a https://hdl.handle.net/10013/epic.32188.d001 Chlorophyll b https://helmholtz.software/projects/datahub DataHub https://sunburstsensors.com/sami-ph pH sensor SAMI-pH, Sunburst Sensors https://www.4h-jena.de/en/maritime-technologies/sensors/hydrocrco2 Carbon dioxide sensor, -4H- JENA engineering GmbH, CONTROS HydroC® CO₂ https://www.allianz-meeresforschung.de/en/activities/data-management-and-digitalisation/underway-research-data DAM_Underway https://www.trios.de/en/opus.html UV process spectrophotometer, TriOS Mess- und Datentechnik GmbH, OPUS [SN: 7138] DIF 9.4 2026-07-04 2026-08-14