Historical MBT Temperature Profiles from Britannia Voyage

This dataset contains historical ocean temperature-depth profiles collected by the vessel Britannia using Mechanical Bathythermograph (MBT) instruments. It covers a three-month voyage from October 1956 to January 1957 across six ocean basins, including the Indian, Atlantic, Pacific, and Southern Oceans. The data was processed and standardized into the NODC C128 format, recording temperature at uniform 5-meter depth intervals down to a maximum of approximately 285 meters.

Use Cases

• Analyzing upper ocean thermal structure across multiple ocean basins in the 1950s using temperature-depth pairs.
• Studying seasonal temperature variations in the Southern Ocean during the austral summer of 1956-1957.
• Calibrating or validating historical ocean climate models with precisely located cruise data (date, position, time).
• Investigating the maximum depth penetration (~285 m) of MBT technology for historical data quality assessments.

Strengths

• Data is processed to a known standard format (NODC C128), ensuring consistency.
• Provides precise spatiotemporal context with cruise information, date, position, and time for each observation.
• Covers a wide geographical range across six major ocean basins during a specific historical period.

Limitations

• The dataset's utility is limited to the upper ocean, as MBT observations have a maximum depth of approximately 285 meters.
• Key metadata such as exact row count, column names, and license information are unavailable from the provided sources.
• There is a conflict in the 'last updated' field between platforms (2026-04-01 on datagov vs. 1957-01-27 on nasa_earthdata).

Provenance

Source

NOAA_NCEI (National Oceanic and Atmospheric Administration, National Centers for Environmental Information)

Collection Method

Collected via Mechanical Bathythermograph (MBT) instruments from the vessel Britannia and processed by NODC.

Time Range

1956-10-20 to 1957-01-27

Freshness

2026-04-01 15:05:21.836849

Geography

Indian Ocean, North Atlantic Ocean, North Pacific Ocean, South Atlantic Ocean, South Pacific Ocean, Southern Ocean