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Earth Science | Oceans | Ocean Optics | Scattering
2 record(s)
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The Huon Estuary Study was undertaken by CSIRO Marine Research between 1996 and 1998. The Huon Estuary is in South Eastern Tasmania. This record references the CTD data from both the spatial (HES) and the weekly monitoring (CM) surveys of the Huon Estuary Study. For the spatial (HES) surveys this includes the raw, intermediate, processed and calibrated data. The record also references the software used to process this data together with the technical reports written in support of the datasets. Two ctd profilers were utilized during the spatial surveys, their deployment during the spatial surveys is described in a technical report CTD Data From the Spatial Surveys of the Huon Estuary, OMR-121/117. A technical report on the performance of the seabird ctd is Sea-Bird CTD Performance in a Salt-Wedge Estuary, OMR-116/117. For the weekly monitoring (CM) surveys only preliminary processing has been undertaken. A readme_cont_ctd.txt file describes the processing routine followed for the weekly monitoring surveys. This dataset has not been calibrated. There are also other problems with the weekly monitoring ctd data especially in terms of depth registration (see Lineage below). CTD deployment information (not the actual data) is stored in the project database which is described by the 'Huon Estuary Study 1996/1998 - Database' metadata record. A number of CTD's were also deployed during the Physical Snapshot Surveys (see Marlin record 'Huon Estuary Study 1996/1998 - Physical Snapshot Survey Data') These ctd's were quickly deployed, the data was not processed and they form part of the snapshot dataset along with underway data collected on the same day. For these reasons this data are not referenced by this metadata record and does not form part of the HES CTD dataset.
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This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2016_V02 Titled: "SOTS: Southern Ocean Time Series Automated Moorings for Climate and Carbon Cycle Studies Southwest of Tasmania". The voyage took place between the 13th March to 16th of April, 2016 departing Hobart (TAS) and returning to Hobart (TAS). Data for 40 deployments were acquired using the Seabird SBE911 CTD 20, fitted with 24 ten litre bottles on the rosette sampler. Sea-Bird-supplied and O&A Calibration Facility calibration factors were used to compute the pressures and preliminary conductivity values. CSIRO calibrations were applied to the temperature data. The data were subjected to automated QC to remove spikes and out-of-range values. The final conductivity calibration was based on a single deployment grouping. The final calibration from the secondary sensor had a standard deviation (S.D) of 0.00138 PSU, well within our target of ‘better than 0.002 PSU’. The standard product of 1dbar binned averaged were produced using data from the primary sensors. The dissolved oxygen data calibration from the secondary sensor was used for the final calibration. The fit had a S.D. of 0.792 uM. The agreement between the CTD and bottle data was good. The Biospherical photosynthetically active radiation (PAR), C-Star transmissometer and the Wetlabs ECO chlorophyll and scattering sensors were also installed on the auxiliary A/D channels of the CTD. The lowered ADCP was also attached to the package, logging internally during each cast. The collected data were subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) Information and Data Centre (IDC) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.