North Pacific Ocean Carbon and Hydrographic Measurements from 1998

From August to October 1998, discrete sample and profile data were collected from the HAKUREI MARU in the North Pacific Ocean and Philippine Sea. The dataset includes measurements for dissolved inorganic carbon, pH, alkalinity, temperature, salinity, dissolved oxygen, nutrients, and chlorofluorocarbons. It was collected by researchers from Kansai Environmental Engineering Center and Hokkaido University as part of the PACIFICA project.

Use Cases

• Modeling ocean carbon storage and acidification based on dissolved inorganic carbon and alkalinity measurements.
• Analyzing historical nutrient distributions based on nitrate, nitrite, phosphate, and silicate data.
• Studying ocean ventilation and circulation using chlorofluorocarbon (CFC) and sulfur hexafluoride tracer data.
• Calibrating satellite-derived chlorophyll estimates with in-situ Chlorophyll a measurements.

Strengths

• Includes multiple related chemical and physical parameters (e.g., DIC, pH, CFCs, nutrients) for integrated analysis.
• Data collected during a defined research cruise (49HG19980812) from August to October 1998, providing temporal context.
• Part of the international PACIFICA project for Pacific Ocean carbon data synthesis.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale modeling.
• Data may reflect geographic and temporal bias inherent to a single 1998 cruise.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Data collected using CTD, Coulometer for DIC measurement, and bottle samples.

Time Range

1998-08-12 to 1998-10-21

Freshness

Last updated 2026-03-05 23:11:45.000440; freshness should be verified.

Geography

North Pacific Ocean and Philippine Sea