UNSW@ADFA Ocean Reference Station in Jervis Bay
An UNSW@ADFA ocean reference station has been successfully constructed and deployed at a site in 70 m water depth off Jervis Bay. The mooring monitors temperature using a thermistor string and current velocities using S4 current meters. Pictured are Colin and John collecting thermistor chain data from the mooring. All observations will be incorporated into Australian Integrated Marine Observing System (IMOS). External funding has been received from IMOS to upgrade and service this morning for next three years.
IMOS (Integrated Marine Observing System) NSW node – Jervis Bay mooring
(Dr Xiao Hua Wang)
UNSW@ADFA researchers have investigated the oceanography of Jervis Bay and its adjacent shelf since 1988 spurred by the interest of Defence. In this proposal, we aim to construct and deploy a pair of moorings at a site off Jervis Bay to extend this data set. The primary purposes of the moorings are to provide real-time observational capability and obtain longer records to be used for on-going oceanographic and climate studies at UNSW@ADFA. All observations will be incorporated into IMOS (Integrated Marine Observing System) and BlueNet. Our mooring complements NSW-IMOS' planned observational infrastructure.
DATA FROM JERVIS BAY MOORING: |
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Temperature data file for January - May 2008 (text file download) |
JBM_TempData_05May08.txt |
Current Meter data file |
Report on the Aanderaa Thermistor Chain Deployment in Jervis Bay
by Donghui Jiang & Xiao Hua Wang
School of PEMS, UNSW@ADFA, Canberra
On 24 January 2008, a thermistor chain of 10 m spacing was deployed into 70-meter water depth to the north of the entrance of Jervis Bay (S 35° 4.47' E150° 51.14', Fig. 1) and the temperature mooring data were collected on 5 May 2008. The sampling rate of the deployment is hourly. Calibration was conducted using 6 selected temperature bins from deployed thermistors (No.6-11) and the averaged offsets and errors are shown in Table 1.
After discarding abnormal data and spikes, the calibrated temperature measurements are linearly interpolated with a vertical interval of 1 meter. Fig. 2 shows the time series of the interpolated temperature depth profile.
The daily averaged temperature measurements (Fig. 3) were compared to that predicted by Bluelink (Fig. 4). Clearly the temperature patterns and major features are reproduced by the Bluelink forecast.
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Acknowledgements
Financial support for this work was provided by the School of PEMS, UNSW@ADFA and NSW IMOS Mooring Sub Facility. Many people have made valuable contributions to this project. In particular we wish to thank Dr Robin Robertson, Dr Andrew Kiss, Colin Simons, Ray Lawton, Vihang Bhatt, Ms Julie Kesby and Adrian Nute.