Tide Gauge Records, Zhong Shan, Larsemann Hills, Australian Antarctic Territory

Brief description

Tides are measured using a submerged pressure type gauge secured in a heavy concrete mooring in Nella Fjord in the Larsemann Hills near Zhong Shan station.\nTidal records are retrieved from the gauge using an inductive loop lowered through a hole in the ice hence the gauge has been undisturbed since it was deployed.\n \nDocumentation dated 2001-06-12\nZhong Shan Submerged Tide Gauge\n\nThe gauge used at Zhong Shan was designed in 1991/2 by Platypus Engineering, Hobart, Tasmania.\nIt was intended to be submerged in about 7 metres of water in a purpose made concrete mooring in the shape of a truncated pyramid.\nThe mooring for the Zhong Shan gauge was cast in concrete at Davis and sling loaded by helicopter to Nella Fjord in the Larsemann Hills and deployed through a hole in the ice.\n\nThe gauge measures pressure using a Paroscientific Digiquartz Pressure Transducer with a full scale pressure of 30 psi absolute. The accuracy of the transducer is 1 in 10,000 of full scale over the calibrated temperature range.\nThe overall accuracy of the system is better than +/- 3 mm for a known water density.\nData is retrieved from the gauges by lowering a coil assembly on the end of a cable over a projecting knob on the top of the gauge and by use of an interface unit, a serial connection can be established to the gauge. Time setting and data retrieval can be then achieved.\n\nData has been retrieved from this gauge once since deployment. The records are complete since deployment.\n\nConversion of raw data to tidal records is done as detailed in document: Details of Conversion of Raw Data.\n\nLevelling\nOne attempts has been made at establishing an absolute height for this gauge using timed water level measurements.\n\nDocumentation dated 2008-10-17\nZhong Shan.\nThe battery in the submerged gauge at Zhong Shan has probably been exhausted. The gauge will be removed at an opportune time.\nThe gauge has not recently been download. There will still be some records available.

Full description

GET DATA - Chart of available data.
VIEW RELATED INFORMATION - Details of conversion of raw data.