Pacific Ocean Carbon and Chemistry Profiles from RYOFU MARU, July 1998

PACIFICA_49RY19980703 includes biological, chemical, and physical data from a July 1998 cruise of the RYOFU MARU across the North Pacific Ocean, Philippine Sea, and South Pacific Ocean. The data were collected by Akira Nakadate of the Japan Meteorological Agency and Masao Ishii of the Meteorological Research Institute using CTD and bottle instruments. This dataset contains 22 measured variables, including dissolved inorganic carbon, alkalinity, pH, nutrients, and chlorofluorocarbons.

Use Cases

• Modeling ocean carbon uptake and storage based on dissolved inorganic carbon and alkalinity measurements.
• Analyzing nutrient cycling and primary productivity based on nitrate, phosphate, silicate, and chlorophyll a data.
• Studying ocean ventilation and water mass age using chlorofluorocarbon (CFC-11, CFC-12) tracers.
• Investigating carbonate system dynamics and ocean acidification based on pH and dissolved inorganic carbon.
• Calibrating and validating regional ocean biogeochemical models with in-situ profile data.

Strengths

• Contains 22 distinct chemical, biological, and physical variables per observation.
• Data collected during a dedicated research cruise (PACIFICA_49RY19980703) with standardized instruments (CTD, bottle).
• Temporal coverage is precisely defined from 1998-07-03 to 1998-07 31.
• Geographic coverage spans three major Pacific Ocean basins: North Pacific, Philippine Sea, and South Pacific.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is from a single month in 1998, limiting analysis of seasonal or long-term trends.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Discrete sample and profile observations using CTD, bottle and other instruments from the RYOFU MARU research vessel.

Time Range

1998-07-03 to 1998-07-31

Freshness

Last updated 2026-03-05 23:25:05.375824; freshness should be verified.

Geography

North Pacific Ocean, Philippine Sea, South Pacific Ocean