Historical Ocean Temperature Profiles from Bathythermograph Cruises

Temperature-depth profiles from mechanical bathythermograph (MBT) instruments collected by SCRIPPS PIER and USNS CHEPACHET vessels. The dataset contains observations from the Caribbean Sea and North Pacific Ocean, processed into the NODC C128 standard format with uniform 5-meter depth intervals. Data collection occurred between October 1963 and November 1968, curated by the National Oceanic and Atmospheric Administration.

Use Cases

• Analyzing the thermal structure of the upper ocean (up to ~285m) using paired temperature-depth values.
• Studying spatial and temporal variability of sea surface temperature and mixed layer depth in the Caribbean Sea and North Pacific.
• Investigating historical ocean conditions from the 1960s using cruise information, date, position, and time metadata.
• Calibrating or validating ocean model simulations for the upper ocean layer with in-situ profile data.

Strengths

• Data is processed to a known standard format (NODC C128), ensuring consistent structure.
• Provides a multi-year time series from 1963 to 1968 for analyzing temporal changes.
• Contains geographically specific observations from two distinct ocean regions (Caribbean Sea and North Pacific).
• Temperature readings are recorded at uniform 5-meter depth intervals, facilitating comparative analysis.

Limitations

• Key metadata such as row count, file size, and specific column names are unavailable from all sources.
• The MBT instrument's maximum depth of approximately 285 meters limits analysis to the upper ocean only.
• Conflict in 'last updated' metadata: datagov reports 2026-03 05, while nasa_earthdata reports the collection end date of 1968-11-29.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Collected via mechanical bathythermograph (MBT) instruments from research vessels, processed by NODC.

Time Range

1963-10-09 to 1968-11-29

Freshness

2026-03-05 22:55:16.567401

Geography

Caribbean Sea and North Pacific Ocean