Precipitation change indicator: data sources and methods, chapter 3

3. Data

3.1 Data source

Environment and Climate Change Canada's Adjusted and Homogenized Canadian Climate Data (AHCCD) were used for the calculation of the Precipitation Change in Canada indicator.

3.2 Spatial coverage

The indicator provides national coverage.

3.3 Temporal coverage

The indicator is calculated using data from climate stations across Canada for the period 1948 to 2014. Seasons are defined as winter (December of the previous year, January and February), spring (March, April and May), summer (June, July and August) and fall (September, October and November).

3.4 Data completeness

Adjustments for data variations caused by changes in site exposure, location, instrumentation, observer and observing procedures over the 67-year reporting period were performed on the dataset. Corrections account for wind undercatch, evaporation and gauge-specific wetting losses. For a detailed discussion of data completeness, please refer to Environment and Climate Change Canada's Adjusted Precipitation Data.

3.5 Data timeliness

The data are current up to 2014.

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