**Draft**Southern Metropolitan Coastal Waters Study (SMCWS) 1991-1994 CTD data

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From 1991 to 1994, salinity, temperature and density were measured in the marine waters off Perth but mainly in the waters of Cockburn Sound and Owen Anchorage. This was undertaken in the context of a PhD study (details in supplementary information) and the Department of Environmental Protection 'Southern Metropolitan Coastal Waters Study'.

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Statement: The primary instrument used in those waters of Cockburn Sound and Owen Anchorage was a fine-scale Conductivity-Temperature-Depth (CTD) probe as described in Vollmer (1991). Vertical profiles were obtained by deploying the probe in free-fall mode from a vessel equipped with a GPS. The data were retrieved to an onboard computer. The drop speed was about 1 m/s and the sampling frequency about 50 Hz yielding a spatial resolution of approx. 0.02 m. In combination the conductivity and temperature sensors yielded density measurements accurate to 0.005 kg/m3. Outside of the waters of Owen Anchorage and Cockburn Sound additional data was collected with a Yeokal Electronics References: Vollmer M K (1991) Sharpening and matching response signals for finescale sensors. Centre for Water Research, University of Western Australia, Nedlands, Western Australia, 6009. Report No. WP 630 MV. Department of Environmental Protection (1996). The Southern metropolitan Coastal Waters Study (1991-1994) Final Report. (Department of Environmental Protection, Perth, Western Australia, 6000). Report 17.