North Pacific Ocean Hydrographic and Nutrient Data from CTD Casts, 1991-2000

The Line P Program at the Institute of Ocean Sciences collected physical, nutrient, and other data from CTD and bottle casts in the North Pacific Ocean from February 1991 to December 2000. Parameters include water depth, temperature, salinity, and concentrations of chlorophyll, silicate, phosphate, nitrate, and nitrite. The dataset summarizes 30 missions along Line P and at Station P, supporting programs like the World Ocean Circulation Experiment.

Use Cases

• Analyze seasonal and interannual variability of ocean temperature and salinity profiles.
• Model nutrient (nitrate, phosphate, silicate) distributions and their relationship to biological productivity.
• Study chlorophyll concentration as a proxy for phytoplankton biomass in the subarctic Pacific.
• Calibrate and validate regional ocean circulation and biogeochemical models.
• Investigate long-term hydrographic changes along a repeated transect (Line P).

Strengths

• Covers a decade of observations from 1991 to 2000.
• Includes multiple key oceanographic parameters: physical (temperature, salinity, depth) and chemical (nutrients, chlorophyll).
• Documents 30 specific research missions and the evolution of sampling equipment.

Limitations

• Last updated 2000-12 31 00:00:00; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

Line P Program, Institute of Ocean Sciences, Fisheries and Oceans Canada; archived by NOAA NCEI.

Collection Method

Collected via Conductivity-Temperature-Depth (CTD) sensor and bottle casts from research vessels.

Time Range

1991-02-19 to 2000-12-31

Freshness

Historical dataset; last data point from 2000-12-31.

Geography

North Pacific Ocean, specifically along Line P and at Station P.