Historical Bathythermograph Data from USS Chenango Cruises

Bathythermograph (MBT) data records temperature-depth profiles from the USS Chenango vessel in the North Pacific Ocean, Philippine Sea, and South Pacific Ocean. The dataset covers a specific period from October 31, 1943, to August 21, 1945, and was processed by the National Oceanographic Data Center (NODC) into the standard C128 format. It consists of pairs of temperature-depth values recorded at uniform 5-meter intervals, useful for studying the thermal structure of the ocean's upper layers.

Use Cases

• Analyzing the thermal structure of the upper ocean (up to 285m depth) in the Pacific theater during World War II.
• Studying historical temperature-depth profiles using the reported cruise information, date, position, and time for each observation.
• Investigating spatial and temporal patterns of near-surface ocean temperatures from the paired temperature-depth values recorded at 5m intervals.
• Calibrating or validating historical ocean model reanalyses for the 1943-1945 period in the specified regions.

Strengths

• Data is processed to a known, documented standard format (NODC C128), ensuring a consistent structure.
• Provides a specific and historically significant time range of observations from 1943-10-31 to 1945-08-21.
• Includes precise geographic coverage across multiple ocean basins (North Pacific, Philippine Sea, South Pacific).

Limitations

• Critical metadata such as row count, column names, and exact data size are unknown across all sources.
• The maximum observation depth is limited to approximately 285 meters, restricting analysis to the ocean's upper layers.
• Sources disagree on the 'last updated' date (2026-03-06 on Data.gov vs. 1945-08-21 on NASA Earthdata), creating uncertainty about metadata maintenance.

Provenance

Source

NOAA National Centers for Environmental Information (NCEI), from the USS Chenango vessel.

Collection Method

Collected using Mechanical Bathythermograph (MBT) instruments and later processed by NODC.

Time Range

1943-10-31 to 1945-08-21

Freshness

2026-03-06 00:19:09.414092

Geography

North Pacific Ocean, Philippine Sea, South Pacific Ocean