Historical Upper Ocean Temperature Profiles from the R/V Diachenko

Mechanical bathythermograph data from the research vessel Diachenko, capturing temperature-depth profiles in the upper ocean across five western Pacific and Asian seas. The dataset contains observations from 1955 to 1958, processed by the National Oceanographic Data Center into its standard C128 format. Each profile provides paired temperature and depth measurements at uniform 5-meter intervals down to a maximum of approximately 285 meters.

Use Cases

• Analyzing seasonal and interannual temperature variability in the upper ocean layer across the East China Sea, South China Sea, and Gulf of Thailand.
• Calibrating or validating regional ocean models for the 1950s using in-situ temperature profile data.
• Studying the vertical thermal gradient and mixed-layer depth from historical instrument records.
• Mapping the spatial distribution of near-surface ocean temperatures in the North Pacific and Philippine Sea during the mid-20th century.

Strengths

• Data is processed to a consistent standard format (NODC C128), ensuring structured temperature-depth pairs.
• Provides a multi-year time series from 1955 to 1958 across five distinct geographic regions.
• Measurements are recorded at a uniform 5-meter depth interval, facilitating comparative analysis.

Limitations

• Instrument maximum depth is ~285m, limiting analysis to the upper ocean only.
• Critical metadata such as row count, column names, and exact license are unavailable across all sources.
• The last update date conflicts between platforms (2026 administrative vs. 1958 data collection).

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Collected via Mechanical Bathythermograph (MBT) instrument from the R/V Diachenko and processed by NODC.

Time Range

1955-04-01 to 1958-11-29

Freshness

2026-03-06 00:25:57.354296

Geography

East China Sea, Gulf of Thailand, North Pacific Ocean, Philippine Sea, South China Sea