PANGAEA_993833 Shipboard ADCP current measurements (38 kHz) during RV SONNE cruise SO316 Kopte, Robert; Kutterolf, Steffen Shipboard ADCP current measurements (38 kHz) during RV SONNE cruise SO316 2026-04-27 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993833 Investigator Robert Kopte robert.kopte@ifg.uni-kiel.de Earth Science DATE/TIME LATITUDE LONGITUDE DEPTH, water Current velocity, east-west Current velocity, north-south Quality flag, current velocity Echo intensity Echo intensity, cleaned Backscatter, relative Pings, averaged to a double ensemble value Percent good pings geoscientificInformation SO316 SO316_0_Underway-4 Vessel mounted Acoustic Doppler Current Profiler [38 kHz] Vessel mounted Acoustic Doppler Current Profiler [38 kHz] Seadatanet flag: Data quality control procedures according to SeaDataNet (2010) Sonne_2 2025-11-25 2025-12-20 Complete 10.3043 15.9852 -100.358 -86.3537 54.0 m (DEPTH, water) 1622.0 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 5203774 data points text/tab-separated-values Kopte, Robert; Kutterolf, Steffen (2026): Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO316 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993836 Kutterolf, Steffen; Krastel, Sebastian; Belo, Julie; Andrade, Mariana; Baumann, Lenya; Beethe, Sarah M; Cisneros, Alejandro; Felgendreher, Meret; Granzow, Julian; Grob, Henrik; Hadré, Emma; Heinrich, Sven; Holzmann, Ben; Hooton, Georga-Marie; Huygen, Fynn; Jähmlich, Heiko; Jones, Christopher; Lebas, Elodie; Luo, Min; Perez, Liseth; Ritzert, Anuschka; Sandoval, María; Scheffler, Janne; Sourisseau, Delphine; Squires, Katherine; Theden, Christian; Wolf, Josephin (2026): Rhythms, Magnitude, and Impacts of Volcanic Ash from Explosive Central American Arc Eruptions: IODP3 pre-site survey, CAVA Tephras, Cruise No. SO316, 21.11.2025 - 26.12.2025, Balboa (Panama) - San Diego (USA). SONNE-Berichte, Begutachtungspanel Forschungsschiffe, SO316, 89 pp, https://doi.org/10.48433/cr_so316 nc file: ADCP current measurements (38 kHz) during RV SONNE cruise SO316 (2026). https://download.pangaea.de/reference/139672/attachments/so_316_vmadcp_38khz.nc Kopte, Robert (2026): Upper-ocean acoustic Doppler current profiler (38kHz-ADCP) underway measurements during SONNE cruise SO316. Institute of Geosciences, Kiel University, https://download.pangaea.de/reference/139671/attachments/so_316_vmadcp_38khz_proc_report.pdf Kopte, Robert; Betz, Maximilian; Anselm, Norbert (2022): SOP 38kHz ADCP aboard of RV Sonne (vessel:sonne:adcp_38khz_650074). Zenodo, https://doi.org/10.5281/zenodo.7022775

Current velocities of the upper water column along the cruise track of R/V Sonne cruise SO316 were collected by a vessel-mounted 38 kHz RDI Ocean Surveyor ADCP. The ADCP transducer was located at 6.0 m below the water line. The instrument was operated in narrowband mode (WM10) with a bin size of 32.00 m, a blanking distance of 16.00 m, and a total of 50 bins, covering the depth range between 54.0 m and 1622.0 m. Attitude data from the ship's motion reference unit were used by the data acquisition software VmDAS internally to convert ADCP beam velocities to geographic coordinates. The Python toolbox OSADCP (version 2.2.0) was used for data post-processing. Acoustic Interferences were identified based on outliers in the ADCP echo intensity data. Echo intensity data were cleaned accordingly and affected velocity cells were flagged to be removed prior ensemble-averaging. Upper-bin single-ping ADCP velocities affected by low echo-intensity were identified using a robust covariance-based outlier detection in velocity-backscatter space and removed when exceeding a chi-square confidence threshold. The ship's velocity was calculated from position fixes obtained by the Global Navigation Satellite System (GNSS), taking into account lever arms of ADCP transducer and GNSS antenna. Accuracy of the derived water velocities mainly depends on the quality of the position fixes and the ship's heading data. Further errors stem from a misalignment of the transducer with the ship's centerline. Data processing included water track calibration of the misalignment angle (-0.0919° +/- 0.5110°) and scale factor (1.0043 +/- 0.0090) of the measured velocities. The velocity data were averaged in time using an average interval of 120 s. Depth cells with ensemble-averaged percent-good values below 25% are marked as 'bad data'. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993833"!

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 https://doi.org/10.48433/cr_so316 Rhythms, Magnitude, and Impacts of Volcanic Ash from Explosive Central American Arc Eruptions: IODP3 pre-site survey, CAVA Tephras, Cruise No. SO316, 21.11.2025 - 26.12.2025, Balboa (Panama) - San Diego (USA) https://doi.org/10.5281/zenodo.7022775 SOP 38kHz ADCP aboard of RV Sonne (vessel:sonne:adcp_38khz_650074) https://doi.pangaea.de/10.1594/PANGAEA.993836 Shipboard ADCP current measurements (75 kHz) during RV SONNE cruise SO316 https://helmholtz.software/projects/datahub DataHub https://uol.de/icbm/forschungsplattformen-schiffe/sonne Sonne_2 https://www.allianz-meeresforschung.de/kernbereiche/datenmanagement-und-digitalisierung#unterwegs DAM_Underway https://www.seadatanet.org/content/download/596/file/SeaDataNet_QC_procedures_V2_%28May_2010%29.pdf Seadatanet flag: Data quality control procedures according to SeaDataNet (2010) DIF 9.4 2026-04-27 2026-04-29