Darwin (Australia) Data Quality Assessment
Quality assessment of sea level data by TOGA Sea Level Center/National Oceanographic Data Center Joint Archive for Sea Level
| Station | Darwin | Latitude | 12°, 28.0' S |
|---|---|---|---|
| Country | Australia | Longitude | 13°0 51.0' E |
| JASL # | 168A | Time Meridian | 135° E (GMT + 9 hr) |
| GLOSS # | 062 | TOGA # | I044 |
| NODC # | 31132001 |
| Contributor: | The National Tidal Facility Flinders University of South Australia GPO Box 2100 Adelaide, 5001, South Australia AUSTRALIA |
|---|---|
| Originator: | Same |
| Original Data: | Analog |
| Instrument Type: | Leupold Stevens A71 float and stilling well gauge. |
| Digitized Interval: | Unconfirmed |
| Present Data: | Hourly, daily, and monthly values obtained by: |
| Hourly: | Unconfirmed |
| Daily: | 119-point convolution filter (Bloomfield, 1976) centred on noon applied to the hourly data with respective periods of the 95, 50, and 5% amplitude points at 124.0, 60.2, and 40.2 hours. |
| Monthly: | Simple average of all daily values; calculated if 7 or fewer days are missing. |
| Span of Data: | 01 January 1984 - 31 December 1990 |
| Gaps > 1 Month: | 19 September 1984 - 14 February 1985 |
| Time Reference: | GMT (hours 00-23) |
| Space-filler Flag: | -9999 |
| Units: | Millimeters |
| Missing Data Flag: | 99999 |
| Reference Level: | The sea level heights are referred to the zero point assigned to the tide staff. Bench mark information is available upon request from the contributors. |
| Comment: | The residuals (observed data minus predicted tides) are very noisy, probably due to shallow water and complex coastal geometry effects that are not resolved by the harmonic analysis. The hourly data may also contain periods with timing errors which are not offset by increments of one hour; however, these periods are not identifiable due to the large fluctuations in the residuals from the unresolved harmonic analysis. Otherwise, the daily and monthly values are reasonable and do not reveal any obvious reference level shifts. The daily means agree well with the nearest station, Wyndham. |
| Special Note from the Data Contributors: | Supply of sea level data subject to the following conditions: |
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