Naval Bathythermograph Temperature Profiles Across the Western Pacific

Temperature-depth profiles from mechanical bathythermograph (MBT) casts conducted by eight Royal Australian Navy and allied vessels across the western Pacific and Indian Oceans from May 1968 to October 1969. The data, processed by the National Oceanographic Data Center (NODC) into standard C128 format, provides uniform 5-meter depth interval measurements up to approximately 285 meters. This collection captures the thermal structure of the upper ocean layer during this specific period.

Use Cases

• Analyzing upper-ocean thermal stratification using paired temperature-depth values.
• Studying spatial patterns of sea surface temperature and subsurface heat content across the listed seas.
• Validating or calibrating historical ocean reanalysis models with in-situ temperature profile data.
• Investigating the operational patterns and data collection routes of specific naval vessels like HMAS Perth or QUEENBOROUGH.

Strengths

• Data is processed to a recognized standard (NODC C128 format), ensuring consistent structure.
• Provides specific temporal coverage from 1968-05-22 to 1969-10-26 across a wide geographic area.
• Includes detailed metadata for each observation: cruise information, date, position, and time.

Limitations

• Key technical specifications are unknown, including total row count, file size, and exact column names.
• MBT instrument limitation restricts observations to a maximum depth of approximately 285 meters, missing deeper ocean structure.
• Platform metadata conflicts: NASA Earthdata lists a last updated date of 1969-10-26, while Data.gov lists 2026-03-05, creating uncertainty about curation timeline.

Provenance

Source

NOAA National Centers for Environmental Information (NCEI), originally from Royal Australian Navy vessels.

Collection Method

Mechanical bathythermograph (MBT) casts processed by NODC.

Time Range

1968-05-22 to 1969-10-26

Freshness

2026-03-05 23:49:01.650972

Geography

Bismarck Sea, Coral Sea, East China Sea, Great Australian Bight, Indian Ocean, Japan Sea, North Pacific Ocean, Philippine Sea, Solomon Sea, South China Sea, South Pacific Ocean, Tasman Sea.