CLIVAR_AAIW05: Hydrographic and Carbon Chemistry Profile Data

NCEI Accession 0108071 contains discrete sample and profile data from the R/V Knorr cruise CLIVAR_AAIW05 in the South Pacific Ocean from August to October 2005. The dataset includes measurements of carbon system parameters like dissolved inorganic carbon and alkalinity, chlorofluorocarbons (CFCs), and essential hydrographic variables including salinity, temperature, and nutrients. These data support the International CLIVAR Global Ocean Carbon and Repeat Hydrography Program's mission to quantify changes in ocean heat, freshwater, and carbon dioxide storage.

Use Cases

• Quantifying changes in ocean carbon storage based on dissolved inorganic carbon and alkalinity measurements.
• Tracing water mass age and circulation using chlorofluorocarbon (CFC-11, CFC-12, CFC-113) and carbon tetrachloride concentrations.
• Assessing ocean acidification trends by analyzing pH and partial pressure of carbon dioxide data.
• Studying nutrient cycling and primary productivity through nitrate, phosphate, and silicate profiles.
• Calibrating and validating biogeochemical ocean models with high-quality, co-located physical and chemical profile data.

Strengths

• Contains a specific and co-located suite of 16 chemical and physical variables crucial for carbon cycle research.
• Data collection is attributed to principal investigators from Scripps Institution of Oceanography and the University of Rhode Island.
• Collected during a dedicated research cruise (CLIVAR_AAIW05) as part of a major international repeat hydrography program.

Limitations

• Key metadata such as row count, file size, and specific column names are not provided by any source platform.
• Conflicting last updated dates exist: one source lists 2005-10-06, while others list 2026-03-05, creating uncertainty about provenance timeliness.
• License information is absent from all provided sources.

Provenance

Source

Scripps Institution of Oceanography (Andrew G. Dickson, James H. Swift) and University of Rhode Island; Graduate School of Oceanography (Lynne D. Talley)

Collection Method

Discrete sample and profile observations collected using alkalinity titrator, CTD, coulometer, and bottle casts from the R/V Knorr.

Time Range

2005-08-21 to 2005-10-06

Freshness

2026-03-05 22:56:40.303885

Geography

South Pacific Ocean