Historical Ocean Temperature Profiles from Mechanical Bathythermographs

From January 21 to May 15, 1958, this dataset contains temperature-depth profiles from the North Pacific Ocean, collected by various small Navy vessels using mechanical bathythermograph (MBT) instruments. Data has been processed into the NODC C128 standard format, with temperature recorded at uniform 5-meter depth intervals down to a maximum of approximately 285 meters. The records are useful for studying the thermal structure of the ocean's upper layers.

Use Cases

• Analyzing seasonal thermal structure changes in the upper ocean based on uniform 5-meter depth intervals.
• Calibrating or validating historical ocean climate models using precisely dated and located cruise data.
• Studying the limitations of mid-20th century oceanographic instrumentation, given the MBT's ~285 meter maximum depth.

Strengths

• Data is standardized to a known archival format (NODC C128), aiding interoperability.
• Provides precise temporal coverage from a specific historical period (1958-01-21 to 1958-05-15).
• Includes core metadata for each observation: cruise information, date, position, and time.

Limitations

• Critical metadata is missing or conflicting: row count, file size, and license are unknown across sources, and the 'last updated' date (2026) is implausible for 1958 data.
• Instrument limitation: MBT data is only useful for the upper ~285 meters of the water column.
• Column names and the exact data schema are not provided, limiting immediate usability.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce (processed by NODC).

Collection Method

Collected via mechanical bathythermograph (MBT) instruments deployed from various small Navy vessels.

Time Range

1958-01-21 to 1958-05-15

Freshness

2026-04-01 15:11:34.835972 (This date is implausible for 1958 data and may reflect a system metadata update.)

Geography

North Pacific Ocean