Historical Upper Ocean Temperature Profiles from NOAA Ship Townsend Cromwell

This dataset contains mechanical bathythermograph (MBT) temperature-depth profiles collected by the NOAA Ship Townsend Cromwell in the North Pacific Ocean. The data, processed by the National Oceanographic Data Center (NODC) into the C128 format, spans over a decade from March 1956 to June 1967. Each observation includes cruise information, date, position, and time, with temperature recorded at uniform 5-meter depth intervals down to a maximum of approximately 285 meters.

Use Cases

• Analyzing decadal variability of near-surface ocean temperature in the North Pacific.
• Calibrating or validating historical ocean model reanalysis products using in-situ profile data.
• Studying the vertical thermal gradient in the upper 285 meters of the ocean from the 1950s to 1960s.
• Correlating ship-track position and time data with specific cruise missions for metadata enrichment.

Strengths

• Provides a consistent 11-year time series (1956-1967) from a single research vessel, reducing platform variability.
• Data is standardized to the NODC C128 format, ensuring uniform 5-meter depth intervals for comparability.
• Includes essential metadata (cruise, date, position, time) for each temperature-depth profile observation.

Limitations

• The maximum observation depth is ~285m, limiting analysis to the upper ocean only.
• Key technical details like row count, file size, and specific column names are unavailable from the sources.
• Sources conflict on the 'last updated' metadata, with one showing a future date (2026-04-01) and another the end of the data collection period (1967-06 30).

Provenance

Source

National Oceanic and Atmospheric Administration (NOAA), Department of Commerce

Collection Method

Mechanical bathythermograph (MBT) instrument measurements processed by NODC.

Time Range

1956-03-28 to 1967-06-30

Freshness

1967-06-30 00:00:00

Geography

North Pacific Ocean