88c15293-91c8-470e-8421-3ca523308d00 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-06-24T21:33:35 creation ISO 19115 2016 RV Investigator Voyage IN2023_V05 CTD Data 88c15293-91c8-470e-8421-3ca523308d00 This record describes the CTD data collected on Investigator voyage IN2023_V05, titled: "Untangling the causes of change over 25 years in the southeast marine ecosystem (SEA-MES Voyage 1)." The voyage took place between June 27, 2023 and July 29, 2023 (AEST), departing from Hobart and returning to Hobart. Data for 62 CTD deployments were acquired using the Sea-Bird SBE9+V2 CTD unit #24 (S/N 1332), fitted with 36 twelve-litre bottles on the rosette sampler. Sea-Bird-supplied calibration factors were used to compute the pressures and preliminary conductivity values. CSIRO-supplied calibrations were applied to the temperature data. The data were subjected to automated QC to remove spikes and out-of-range values. The initial configuration of the CTD for casts #1-22 is shown in table 1 below. For casts #23-62 , the CDOM sensor on channel A4 was replaced by the Chelsea Aquatracka fluorometer (as indicated in table 1 below) due to suspiciously high readings obtained using the Wetlabs FLBBRTD fluorometer near the water surface. The Chelsea unit yielded a similar response, providing confidence that the unexpectedly high chlorophyll readings near the surface were not caused by sensor issues. The final conductivity calibration was based on a single deployment grouping. The final calibration from the secondary sensor had a standard deviation (SD) of 0.0013744 PSU, well within our target of ‘better than 0.002 PSU’. The standard product of 1-decibar binned averages were produced using data from the secondary sensors. The dissolved oxygen data (primary) calibration fit had a SD of 0.7868 μM. The agreement between the CTD and bottle data was good. Additional sensors include: SUNA Nitrate, Altimeter (Tritech PA500), Transmissometer (Wetlabs CStar), CDOM (replaced by Chealsea Aquatracka after cast #22), Chlorophyll-a, Scattering (Wetlabs ECO FLCDRTD) were installed on the auxiliary A/D channels of the CTD. The collected data were processed (quality-controlled), and subsequently archived by the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC). Additional information regarding this dataset may be contained in the Voyage Summary and the Data Processing Report. {"type": "Polygon", "coordinates": [[[147.3307, -43.4519], [150.3779, -43.4519], [150.3779, -36.3025], [147.3307, -36.3025], [147.3307, -43.4519]]]} 147.3307 150.3779 -43.4519 -36.3025 Data Licensing documentDigital Link to Data License / Attribution statements HTML Processing Report (PDF) documentDigital Download the Processing Report (PDF format) HTML Data Trawler documentDigital Link to Data available for this voyage via the Data Trawler HTML CTD Scanned Data (NetCDF) documentDigital Download the CTD Scanned Data (NetCDF Format) HTML CTD Data (Matlab Format) documentDigital Download the CTD Data (Matlab Format) HTML CTD Data (CSV) documentDigital Download the CTD Data (CSV format) HTML Plots for Processing Report (PNG) documentDigital Download plots associated with the Processing Report (PNG Format) HTML CTD Data (netCDF format) documentDigital Download the CTD Data (NetCDF Format) HTML Investigator Survey documentDigital Link to RV Investigator Survey Information, including voyage plans and summaries HTML Marine National Facility documentDigital Link to the Marine National Facility Homepage HTML Unnamed resource documentDigital License Graphic PNG