Historical Naval Bathythermograph Profiles from the Indo-Pacific

Mechanical bathythermograph (MBT) data from five naval vessels, including HMAS Derwent and HMAS Diamantina, collected across the Indo-Pacific region. The dataset contains temperature-depth profile pairs recorded at uniform 5-meter intervals down to a maximum depth of approximately 285 meters. Processed by the National Oceanographic Data Center (NODC) into the standard C128 format, it captures ocean thermal structure from February 1968 to August 1969.

Use Cases

• Analyzing seasonal thermal structure changes in the upper ocean layers using paired temperature-depth values.
• Calibrating or validating historical ocean models for the South Pacific and Indian Oceans with cruise-position and time-stamped observations.
• Studying the spatial variability of near-surface ocean temperatures across diverse basins like the Coral Sea and Gulf of Thailand.
• Investigating naval data collection methods and instrument limitations of mechanical bathythermographs from the late 1960s.

Strengths

• Data is standardized to the NODC C128 format, ensuring consistency across profiles.
• Covers a wide geographic range across nine distinct ocean basins and seas in the Indo-Pacific.
• Provides a specific 18-month time range (1968-02-19 to 1969-08-13) of historical observations.

Limitations

• Conflicting metadata: row counts, column names, and exact data size are unknown across all platforms.
• Instrument limitation: MBT observations are restricted to a maximum depth of ~285m, capturing only the upper ocean thermal structure.
• License and authorship information is not provided, limiting clarity on reuse terms and original collectors.

Provenance

Source

NOAA National Centers for Environmental Information (NCEI), originally from naval vessels HMAS Derwent, HMAS Diamantina, HMAS Moresby, HMAS Parramatta, and QUEENBOROUGH.

Collection Method

Processed by the National Oceanographic Data Center (NODC) from mechanical bathythermograph (MBT) instrument readings into the C128 format.

Time Range

1968-02-19 to 1969-08-13

Freshness

2026-04-01 15:08:30.033919

Geography

Bismarck Sea, Coral Sea, Great Australian Bight, Gulf of Thailand, Indian Ocean, Solomon Sea, South China Sea, South Pacific Ocean, Tasman Sea.