Processed seawater temperature, conductivity and salinity obtained at different depths by CTD buoy 2019O6 as part of the MOSAiC Distributed Network

• Main Authors: Hoppmann, Mario, Kuznetsov, Ivan, Fang, Ying-Chih, Rabe, Benjamin
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: 2019O6; AF-MOSAiC-1; AF-MOSAiC-1_124; Akademik Fedorov; Akademik Tryoshnikov; Arctic Ocean; AT-MOSAiC-1; AT-MOSAiC-1_4; buoy; calculated from pressure and latitude; Conductivity; CTD; SEA-BIRD SBE 37-IMP MicroCAT; DATE/TIME; DEPTH; water; Drift velocity; eddy; Flag; FRAM; FRontiers in Arctic marine Monitoring; Gear identification number; LATITUDE; LONGITUDE; mesoscale; mesoscale eddy; MIDO; MOSAiC; MOSAiC20192020; AF122/1; Multidisciplinary drifting Observatory for the Study of Arctic Climate; Multidisciplinary Ice-based Distributed Observatory; North Greenland Sea; Ocean CTD buoy; oceanographic time series; oceanography; OCTDB; Pressure; PS122/1_1-153; PSS-78; salinity scale; Quality flag; salinity; Arctic; Greenland; Laptev Sea; Berichte zur Polar- und Meeresforschung; Greenland Sea; laptev; North Greenland; Reports on Polar and Marine Research
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.940296; https://doi.org/10.1594/PANGAEA.940296

CTD buoy 2019O6 was deployed in the MOSAiC Distributed Network in the Northern Laptev Sea in early October 2019 as part of a set of eight identical ice-tethered buoy systems, each consisting of 5 Seabird SBE37IMP Microcat CTDs mounted along an inductive modem tether at depths of 10, 20, 50, 75 and 100m. The CTDs were recording oceanographic data internally at 2-minute intervals. The surface unit of the buoy prompted the instruments for an additional measurement every 10 minutes, which was then transmitted to a base station via iridium along with GPS position and time, as well as surface temperature. After 308 days of drift through the Central Arctic Ocean, 2019O6 was recovered in August 2020, and the internally recorded data from the CTDs were secured. The 10-minute buoy data and 2-minute CTD data were co-processed and merged into a combined product. A buoy flag indicates whether a measurement was taken by the buoy (1) or was recorded by the CTD itself (0). The data were quality controlled by means of outlier detection using global limits, moving average filters and manual inspection. The dataset was carefully checked for inconsistencies, especially in the salinity. Where appropriate, parameters were modified to enhance the quality. A (slightly modified) quality flagging scheme was applied according to the Ocean Data Standards Volume 3 (UNESCO 2013), where 1 = Good, 2 = Good (Modified), 3 = Questionable, 4 = Bad, 9 = no data. Finally, the data were validated against independent measurements. Details are available in the data paper indicted below.