CTD Casts from R/V Hakuho Maru Cruise KH925

Tropical Pacific oceanographic data from the equator at 156°E, collected between November 29 and December 26, 1992. The dataset contains 101 CTD casts measuring temperature, salinity, dissolved oxygen, and potential density at one-meter intervals from the surface to 1000 meters depth. It was gathered as part of the Tropical Ocean Global Atmosphere and Coupled Ocean-Atmosphere Response Experiment project.

Use Cases

• Analyzing vertical profiles of temperature and salinity for water mass identification.
• Calibrating satellite-derived sea surface salinity measurements using in-situ data.
• Studying dissolved oxygen distribution for insights into biological productivity.
• Validating ocean circulation models with high-resolution depth-interval data.
• Investigating short-term variability in the equatorial Pacific during the TOGA/COARE experiment period.

Strengths

• Contains 101 individual CTD casts, providing a dense time series over a one-month period.
• Data is vertically resolved at one-meter intervals from 0 to 1000 meters depth.
• Salinity data was calibrated by comparison with rosette data, suggesting a quality control step.

Limitations

• Column names are unknown, limiting immediate understanding of the data structure.
• Conflicting last-update metadata: one source lists 1992-12-26, another lists 2026-03-05.
• Key metadata such as license, exact file formats, and dataset size are not provided.

Provenance

Source

Kensuke Takeuchi from the Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan.

Collection Method

Collected via Conductivity, Temperature, and Depth (CTD) sensors from R/V Hakuho Maru cruise KH925.

Time Range

1992-11-29 to 1992-12-26

Freshness

2026-03-05 22:47:02.449540

Geography

Tropical Pacific Ocean, equatorial region at 156°E.