Heard Island Tide Gauge Records from 1997 and Historical Periods

Heard Island tidal measurements collected in March 1997 using a portable pressure transducer, yielding a 22-hour record. The data was connected to a local geodetic benchmark via leveling and a 2-hour GPS observation. The dataset also references historical tidal data from the National Tidal Centre for 1948, 1980, and 1986-1987.

Use Cases

• Calculate approximate Mean Sea Level (MSL) based on the described leveling and GPS observations.
• Analyze short-term tidal behavior around Heard Island using the 22-hour pressure record.
• Compare modern (1997) tidal measurements with historical records from 1948, 1980, and 1986-1987.
• Validate or calibrate tidal models for the remote Antarctic region of Heard Island.

Strengths

• Includes a direct connection to a geodetic benchmark (Pageos site) via leveling and GPS, providing a vertical datum reference.
• References additional historical tidal data from multiple years (1948, 1980, 1986-1987), offering potential for temporal comparison.

Limitations

• The primary 1997 record is only 22 hours long, which may not capture full tidal cycles or long-term trends.
• Row count, column definitions, and file formats are unknown, limiting suitability assessment.
• Last updated 1997-03-19 23:59:59.999000; freshness should be verified for current applications.

Provenance

Source

AU_AADC (Australian Antarctic Data Centre), referenced via NASA Earthdata.

Collection Method

Measured using a portable pressure transducer secured below the low water line, with geodetic connection via leveling and GPS.

Time Range

Primary record from March 1997 (22 hours). Historical data referenced for 1948, 1980, and 1986-1987.

Freshness

1997-03-19 23:59:59.999000

Geography

Heard Island, specifically Atlas Cove, Antarctic region.