Yellow Sea CTD Data with Nutrient and Radium Isotope Measurements

Water temperature, salinity, nutrient concentrations, and radium isotope data were collected from the Yellow and East China Seas aboard the R/V Onnuri in February 2017. The dataset includes measurements of dissolved inorganic nitrogen, phosphorus, and 228Ra, captured using a Sea-Bird SBE 911-plus CTD and analyzed with an auto nutrient analyzer. Data is provided by the Korean Institute of Ocean Science and Technology and archived by NOAA NCEI.

Use Cases

• Analyzing nutrient concentrations (DIN, DIP) to assess eutrophication potential in coastal waters.
• Using salinity and temperature profiles from CTD casts to identify water mass boundaries.
• Employing radium-228 isotope measurements as a tracer for groundwater input or sediment-water exchange.
• Correlating physical parameters (temperature, salinity) with chemical nutrient data to study biogeochemical processes.

Strengths

• Data collection used standardized oceanographic instruments: a Sea-Bird SBE 911-plus CTD and 10-liter Niskin bottles.
• Nutrient analysis followed a specific protocol using a SEAL Analytical QuAAtro39 auto analyzer and 0.7-μm filtration.
• Measurements cover a defined one-week cruise period from February 7 to 14, 2017.

Limitations

• The exact row count, file size, and complete column list are unknown from all sources.
• Sources conflict on the 'last updated' date, reporting both 2017-02-14 and 2026-03-06.
• License information is not provided.

Provenance

Source

Korean Institute of Ocean Science and Technology, R/V Onnuri, archived by NOAA NCEI (Accession 0200368).

Collection Method

Seawater samples obtained via Niskin bottles on a Rosette frame; hydrophysical data from CTD; nutrients analyzed after filtration and freezing; 228Ra measured with a Germanium detector.

Time Range

2017-02-07 to 2017-02-14

Freshness

2026-03-06 00:18:31.158326

Geography

Yellow Sea and East China Sea.