Historical Upper Ocean Temperature Profiles from Mechanical Bathythermographs

1948 to 1968 temperature-depth profiles collected by eight research vessels in the Caribbean Sea, Gulf of Mexico, North Atlantic, and North Pacific Oceans. Data is processed by the National Oceanographic Data Center (NODC) into the standardized C128 format, providing paired temperature and depth measurements at uniform 5-meter intervals. This dataset captures the thermal structure of the ocean's upper layers to a maximum depth of approximately 285 meters.

Use Cases

• Analyzing historical temperature trends in the upper ocean (0-285m) using temperature-depth pairs.
• Studying spatial variability of thermal layers across the Caribbean Sea, Gulf of Mexico, and North Atlantic/Pacific.
• Calibrating or validating ocean model simulations for the mid-20th century period.
• Correlating cruise-specific ocean conditions with other historical meteorological or oceanographic records.

Strengths

• Covers a significant 20-year time period from 1948 to 1968.
• Data is standardized to the NODC C128 format, ensuring consistent structure.
• Includes precise metadata for each observation: cruise, date, position, and time.

Limitations

• Maximum observation depth is ~285m, limiting analysis to the upper ocean only.
• Specific row count, total size, and column names are not provided by the sources.
• Data freshness is unclear: one source lists a 2026 metadata update, another lists 1968 as the last update.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Mechanical bathythermograph (MBT) instrument measurements processed by NODC.

Time Range

1948-04-08 to 1968-09-15

Freshness

2026-03-05 22:55:04.013325 (datagov metadata update); 1968-09-15 (nasa_earthdata data date).

Geography

Caribbean Sea, Gulf of Mexico, North Atlantic Ocean, North Pacific Ocean