Observations of sea level at Port Arthur, Tasmania

Brief description

Contains observations of sea level at Port Arthur, Tasmania during the period June 1999 to September 2002.

Lineage

Maintenance and Update Frequency: asNeeded

Statement: Location: Port Arthur, Tasmania
43 deg 08 min 50 secs South, 147 deg 51 min 10 sec East

Start time: 04:13:51 GMT on 24/6/1999

End time: 04:31:58 GMT on 20/9/2002

Data was recorded using an Aquatrak 4100 acoustic tide gauge mounted in a stilling well with a Vitel WLS2 logger. The data consists of averages taken over three minutes, recorded every six minutes.

Data includes the time (as seconds from midnight on 1/1/1999) and sea level (measured downwards from the tide gauge zero).

A small correction has been applied to allow for clock drift.

There is a small amount (around 0.03%) of missing data. Where data is missing, those records are also missing; i.e. there are no "missing data" flags.

The tide gauge zero is 3299.6 mm ABOVE AHD (Tasmania).

For information on other local survey marks, see:

Watson, C.S., 1999. A Contribution to Absolute Sea Level in Tasmania, B. Surv. (Hons.) thesis, 200 pp., University of Tasmania, Hobart, Tasmania, Australia.

Temperature corrections were applied as per:

Hunter, J.R., 2003. A note on the temperature correction of the Aquatrak acoustic tide gauge, J. Atmos. Oceanic Technol., Vol. 20, 1230-1235.

Format of data in file present_dat_gmt:

First column: time in seconds after 00:00:00 GMT on 1/1/1999

Second column: distance in mm measured DOWNWARDS from tide gauge zero to water surface

Notes

Purpose
To contribute to the knowledge of past sea level rise in the Southern Hemisphere.