Environmental Thematic Maps and Graphics:
Summer precipitation change, by ecoprovince, 1979 to 2016

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Map: Summer precipitation change, by ecoprovince, 1979 to 2016

Description for Map

The title of this map is “Summer precipitation change, by ecoprovince, 1979 to 2016.” This map provides a visual representation of the change in average summer precipitation in Canada, by ecoprovince, over the time period from 1979 to 2016.

On the page, there is one large map of Canada, a legend to the upper right and a scale bar below. The map delineates ecoprovinces with a thin black boundary line and ecoprovinces are labeled with a code. Fine black dashed lines show provincial and territorial boundaries. Below the map, ecoprovince codes and their corresponding names are listed for reference.

The map shows the change in precipitation trends through a colour range of browns and teals. Decrease in precipitation is shown through shades of brown, while increase in precipitation is shown through shades of teal. Grey diagonal hatching is used to indicate ecoprovinces where trends are not significant at the 90% confidence interval or above.

The unit of measurement is millimetres (mm). The legend contains six precipitation categories: greater than or equal to 60 (dark teal), 25 to less than 60 (teal), 0 to less than 25 (light aqua), -10 to less than 0 (beige), -75 to less than -10 (tan), and less than -75 (brown).

The map shows varying trends in summer precipitation from 1979 to 2016. Average summer precipitation has increased in much of southern Canada, and northwestern Canada and decreased in much of northern Canada, and the east coast and west coast. The ecoprovince with the greatest increase in precipitation is 09.3. The ecoprovinces with the greatest decrease in precipitation include 02.5, 02.6, 01.2, and 05.3.

Notes: Statistically significant linear trends are presented at the 90% confidence interval or above. Caution should be used when analyzing trends in the North because of lower climate station densities. Summer data are from June to August.

Sources:
Statistics Canada, Environment and Energy Statistics Division (EESD), 2021, special tabulation based on Wang, S., Y. Yang, Y. Luo and A. Rivera, 2013, “Spatial and seasonal variations in evapotranspiration over Canada's landmass,” Hydrology and Earth System Sciences, Vol. 17, no. 9, pp. 3561-3575, https://doi.org/10.5194/hess-17-3561-2013 (accessed December 1, 2020);
Wang, S., et al., 2014, “A national-scale assessment of long-term water budget closures for Canada’s watersheds,” Journal of Geophysical Research: Atmospheres, Vol. 119, pp. 8712–8725, https://doi.org/10.1002/2014JD021951 (accessed February 1, 2021).

Legend
Precipitation change, 1979 to 2016
Table summary
This table displays the results of Precipitation change. The information is grouped by Colour (appearing as row headers), Precipitation change (mm) (appearing as column headers).
Colour	Precipitation change (mm)
Dark teal	Greater than or equal to 60
Teal	25 to less than 60
Light aqua	0 to less than 25
Beige	-10 to less than 0
Tan	-75 to less than -10
Brown	Less than -75
Grey lines	Trend not statistically significant
Shape	Boundary
Dashed line	Province/territory
Black outline	Ecoprovince

Data
Summer precipitation change, 1979 to 2016
Table summary
This table displays the results of Summer precipitation change. The information is grouped by Code (appearing as row headers), Ecoprovince and Precipitation change, calculated using mm units of measure (appearing as column headers).
Code	Ecoprovince	Precipitation change
Code	Ecoprovince	mm
1.1	Northern Arctic Cordillera	4.5^{Note E: Use with caution}
1.2	Southern Arctic Cordillera	-23.9^Note *
2.1	Sverdrup Islands	1.0^{Note E: Use with caution}
2.2	Ellesmere Basin	1.7^{Note E: Use with caution}
2.3	Victoria Lowlands	0.2^{Note E: Use with caution}
2.4	Parry Channel Plateau	-0.3^{Note E: Use with caution}
2.5	Boothia–Foxe Shield	-19.2^Note *
2.6	Baffin Uplands	-31.4^Note *
2.7	Foxe–Boothia Lowlands	-10.7^{Note E: Use with caution}
3.1	Amundsen Lowlands	3.5^{Note E: Use with caution}
3.2	Keewatin Lowlands	-9.2^{Note E: Use with caution}
3.3	Ungava–Belcher	-7.2^{Note E: Use with caution}
4.1	Mackenzie Foothills	37.8^Note *
4.2	Great Bear Lowlands	16.5^{Note E: Use with caution}
4.3	Hay–Slave Lowlands	30.7^{Note E: Use with caution}
5.1	Western Taiga Shield	-0.1^{Note E: Use with caution}
5.2	Eastern Taiga	11.9^{Note E: Use with caution}
5.3	Labrador Uplands	-24.4^Note *
5.4	Whale River Lowland	47.1^Note *
6.1	Western Boreal Shield	24.9^Note **
6.2	Mid-Boreal Shield	14.7^{Note E: Use with caution}
6.3	Eastern Boreal Shield	-6.7^{Note E: Use with caution}
6.4	Newfoundland	-41.3^{Note E: Use with caution}
6.5	Lake of the Woods	31.9^{Note E: Use with caution}
6.6	Southern Boreal Shield	17.2^{Note E: Use with caution}
7.1	Appalachian–Acadian Highlands	32.1^{Note E: Use with caution}
7.2	Northumberland Lowlands	3.6^{Note E: Use with caution}
7.3	Fundy Uplands	-13.4^{Note E: Use with caution}
8.1	Great Lakes–St. Lawrence Lowlands	25.6^{Note E: Use with caution}
8.2	Huron–Erie Plains	-30.3^{Note E: Use with caution}
9.1	Boreal Foothills	3.0^{Note E: Use with caution}
9.2	Central Boreal Plains	28.7^{Note E: Use with caution}
9.3	Eastern Boreal Plains	67.7^Note *
10.1	Eastern Prairies	47.9^{Note E: Use with caution}
10.2	Parkland Prairies	26.0^{Note E: Use with caution}
10.3	Central Grassland	26.7^{Note E: Use with caution}
11.1	Northern Yukon Mountains	12.4^{Note E: Use with caution}
11.2	Old Crow–Eagle Plains	1.1^{Note E: Use with caution}
11.3	Ogilvie Mountains	6.4^{Note E: Use with caution}
11.4	Mackenzie–Selwyn Mountains	34.9^Note *
12.1	Wrangel Mountains	-38.0^Note *
12.2	Northern Boreal Cordillera	25.8^Note **
12.3	Southern Boreal Cordillera	36.1^Note **
12.4	Western Boreal Cordillera	-12.9^{Note E: Use with caution}
13.1	Georgia Depression	-53.8^{Note E: Use with caution}
13.2	Southern Coastal Mountains	-19.1^{Note E: Use with caution}
13.3	Northern Coastal Mountains	49.7^{Note E: Use with caution}
14.1	Northern Montane Cordillera	24.4^{Note E: Use with caution}
14.2	Central Montane Cordillera	-11.3^{Note E: Use with caution}
14.3	Southern Montane Cordillera	-57.6^Note *
14.4	Columbia Montane Cordillera	-38.2^{Note E: Use with caution}
15.1	Hudson Bay Coastal Plains	1.4^{Note E: Use with caution}
15.2	Hudson–James Lowlands	7.2^{Note E: Use with caution}
^E use with caution Note * significantly different from reference category (p < 0.05) Return to note * referrer Note significantly different from reference category (p < 0.10) Return to note referrer

Date modified:: 2022-01-25

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Environmental Thematic Maps and Graphics:
Summer precipitation change, by ecoprovince, 1979 to 2016

Archived Content

Environmental Thematic Maps and Graphics: Summer precipitation change, by ecoprovince, 1979 to 2016

Archived Content

Environmental Thematic Maps and Graphics:
Summer precipitation change, by ecoprovince, 1979 to 2016