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On the Temperature Correction of the Aquatrak Acoustic Tide Gauge


Hunter, JR, On the Temperature Correction of the Aquatrak Acoustic Tide Gauge, Journal of Atmospheric and Oceanic Technology, 20, (8) pp. 1230-1235. ISSN 0739-0572 (2003) [Refereed Article]

DOI: doi:10.1175/1520-0426(2003)020<1230:OTTCOT>2.0.CO;2


Temperature corrections for the Aquatrak acoustic tide gauge are derived. These account for variable temperature (and hence sound velocity) along the sounding tube, thermal expansion of the calibration tube, and the thermal response of the transducer/controller combination. When averaged over long periods (e.g., seasonal), the corrections are typically several millimeters in magnitude, with short-period (e.g.. diurnal) variations as large as several centimeters. The correction associated with thermal expansion of the calibration tube is of the same order as the correction for variable sound velocity, which is already applied at some Aquatrak installations. The corrections derived here relate to the situation in which an initial adjustment has been made by the manufacturer (making the calibration tube a fixed known length under factory conditions), and a subsequent calibration is performed to define a single zero offset for the instrument.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Hunter, JR (Dr John Hunter)
ID Code:35715
Year Published:2003
Web of Science® Times Cited:8
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2005-08-26
Last Modified:2005-08-26

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