Bottom Water pH in the St. Lawrence Estuary and Gulf, 2017 Interpolated Grid

The Estuary and Gulf of St. Lawrence bottom waters, including shallow areas, are covered by this gridded pH dataset. Data result from a 3D interpolation on a 1km x 1km x bottom depth grid, using all available CTD data from multidisciplinary surveys in August and September 2017. The data is produced by Fisheries and Oceans Canada as part of long-term surveys initiated in 1990 for the northern region and 1971 for the southern Gulf.

Use Cases

• Modeling ocean acidification impacts on marine ecosystems based on interpolated pH values.
• Analyzing spatial patterns of bottom water chemistry in relation to bathymetry using the 1km grid.
• Correlating pH conditions with biological survey data on groundfish and invertebrates mentioned in the description.
• Monitoring long-term environmental changes in the St. Lawrence using data from standardized annual surveys.

Strengths

• Data is derived from standardized multidisciplinary surveys conducted annually since 1990 (northern Gulf) and 1971 (southern Gulf).
• Provides a spatially continuous 3D interpolation on a consistent 1km x 1km x bottom depth grid.
• Specific protocols and annual reports are documented and referenced, including a 2017 research document.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• The primary data is from a specific time window (August-September 2017), limiting temporal analysis.

Provenance

Source

Fisheries and Oceans Canada

Collection Method

3D interpolation of CTD data collected during standardized multidisciplinary surveys.

Time Range

Primary data from August and September 2017.

Freshness

Last updated 2026-04-16 12:34:26.308811; freshness should be verified.

Geography

Estuary and Gulf of St. Lawrence, Canada.