Pacific Circulation Index Winter Atmospheric Anomaly Time Series

The Pacific Circulation Index (Winter) is a derived climate index representing cumulative negative northwesterly atmospheric circulation frequency anomalies for December through March. It quantifies trends in westerly and southwesterly circulation off Canada's west coast, with data provided by Fisheries and Oceans Canada.

Use Cases

• Analyze long-term trends in the Pacific Circulation Index to study changes in winter atmospheric circulation patterns.
• Correlate the index with other climate variables to assess its relationship to the Aleutian Low pressure system.
• Use the index as a predictor variable in models for regional climate impact studies on the Pacific coast.

Strengths

• Data is provided by a government scientific agency, Fisheries and Oceans Canada, ensuring authoritative sourcing.
• The index is derived from specific atmospheric circulation components (Z, M1, M2) for focused climate analysis.
• The dataset is associated with a detailed scientific citation and a full technical document for reference.

Limitations

• The dataset's temporal coverage and number of data points (rows) are unspecified, limiting assessment of its historical scope.
• No columnar data structure or sample data is available, obscuring the specific format and variables present.
• The index is a derived, aggregated metric, so raw underlying atmospheric measurements are not directly accessible.

Provenance

Source

Fisheries and Oceans Canada, Pacific Biological Station, and the Arctic and Antarctic Research Institute.

Collection Method

Derived from the cumulative summation of negative northwesterly atmospheric circulation frequency anomalies (Z, M1, M2).

Time Range

Winter months (December through March); specific years of coverage are not stated.

Freshness

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Geography

Focuses on atmospheric circulation over the North Pacific, specifically off the west coast of Canada.