A.P.I.O.S.: Acidic Precipitation Soil Chemistry Baseline for Ontario

The Acidic Precipitation in Ontario Study (A.P.I.O.S.) was established in 1979 by the Ontario Ministry of the Environment. Its principal objective is to establish a uniform soil chemistry data base across the province to identify future trends and map soil sensitivity to acidic deposition. The study investigates effects such as reduced soil pH, leaching of nutrients like magnesium and calcium, and mobilization of metals like aluminum.

Use Cases

• Modeling soil sensitivity to acidic deposition based on baseline soil chemistry data.
• Analyzing trends in soil acidification indicators like pH and base saturation over time.
• Mapping regional vulnerability to acidic precipitation across Ontario based on soil buffering capacity.
• Calibrating laboratory experiments on soil chemistry using field-derived baseline data.

Strengths

• Established in 1979, providing a long-term study foundation.
• Designed to create a uniform provincial data base for trend analysis.
• Explicitly investigates multiple soil chemistry effects like pH change and nutrient leaching.

Limitations

• Row count and dataset scale are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Government of Ontario | Gouvernement de l'Ontario

Collection Method

Established by the Ontario Ministry of the Environment to monitor acidic deposition effects.

Time Range

Study established in 1979; specific temporal coverage of data is unknown.

Freshness

Last updated 2026-03-18 13:34:45.979060; freshness should be verified.

Geography

Province of Ontario, Canada.