Historical Upper Ocean Temperature Profiles from CUMULUS Cruises

Mechanical bathythermograph data from the CUMULUS project provides temperature-depth profiles for the upper ocean layers in the North Atlantic and Norwegian Sea. The dataset contains observations recorded at uniform 5-meter intervals down to a maximum depth of approximately 285 meters. It was processed by the National Oceanographic Data Center (NODC) into the standard C128 format and is managed by NOAA.

Use Cases

• Analyzing the thermal structure of the upper ocean (0-285m) using paired temperature-depth values.
• Investigating spatial and temporal patterns of sea surface temperature and subsurface layers from cruise-based observations.
• Studying historical ocean conditions using data points linked to specific cruise information, date, position, and time.
• Calibrating or validating ocean model outputs for the North Atlantic and Norwegian Sea regions during the late 1950s and early 1960s.

Strengths

• Data is processed to a known standard format (NODC C128), ensuring a consistent structure for analysis.
• Provides a multi-year temporal coverage from March 1958 to December 1964 for studying decadal-scale changes.
• Contains geospatially referenced observations from specific ocean regions (North Atlantic Ocean and Norwegian Sea).

Limitations

• Key metadata such as row count, file size, and specific column names are unavailable from all sources.
• The mechanical bathythermograph instrument limits observations to the upper 285 meters of the ocean, excluding deeper waters.
• Platforms disagree on the last updated date: Data.gov lists 2026-03-05, while NASA Earthdata lists the final observation date of 1964-12-06.

Provenance

Source

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

Collection Method

Temperature-depth profiles gathered using mechanical bathythermograph (MBT) instruments during CUMULUS project cruises and processed by NODC.

Time Range

1958-03-27 to 1964-12-06

Freshness

2026-03 05 23:17:03.961661

Geography

North Atlantic Ocean and Norwegian Sea.