Standardized Precipitation Index For Ontario Climate Stations

The Standardized Precipitation Index (SPI) quantifies precipitation deficits and surpluses for multiple time scales at Environment Canada long-term climate stations in Ontario. The dataset includes SPI calculations for one, three, six, nine, 12, and 24-month periods. It is a legacy dataset from the Government of Ontario that is no longer maintained.

Use Cases

• Analyze precipitation deficit and surplus patterns across the six SPI time scales to identify drought or flood frequency.
• Study the impact of dry and wet conditions using the one-month and three-month SPI values for water management planning.
• Model long-term precipitation trends by comparing the 12-month and 24-month SPI sequences across Ontario stations.

Strengths

• Provides SPI calculations for six standardized time scales, enabling multi-temporal drought analysis.
• Data originates from Environment Canada long-term climate stations, ensuring authoritative source measurements.

Limitations

• Dataset is explicitly noted as legacy and no longer maintained or supported, indicating potential staleness.
• Data is distributed in a Microsoft Access Geodatabase format, which may require specific, outdated software to access.

Provenance

Source

Government of Ontario, derived from Environment Canada long-term climate stations.

Collection Method

Generated from precipitation data to calculate the Standardized Precipitation Index.

Time Range

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Freshness

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Geography

Ontario, Canada.