Map 2.5
Treed area and long-term temperature trends by climate region

The title of this map is "Treed area and long-term temperature trends by climate region." This map displays the increase in annual and winter temperature trends by climate region, as well as the percentage of treed area.

On this map, temperature trends are shown using a set of red arrow icons for each of eleven climate regions. The arrow icon on the left represents annual temperature trends from 1948 to 2016 while the arrow icon on the right represents winter temperature trends from 1948 to 2017. The temperature trend is posted next to each arrow and the climate region name appears below each pair of arrows.

The level of green shading represents the percentage of treed area. The colour ranges on a scale from white (0%) through light green (50%) to green (100%). Water is pale blue.

A solid black lines outlines climate region boundaries. Non-inventoried areas are shown in white with grey diagonal lines—there is no data for these areas.

Climate regions that experienced the largest increases in the long-term annual temperature trend were Mackenzie District and Yukon and North B.C. Mountains, while those with the smallest increases were Atlantic Canada and Great Lakes and St. Lawrence. The largest increases in the long-term winter temperature trend were Yukon and North B.C. Mountains and the Mackenzie District followed by Northwestern Forest. Climate regions with the most treed area include Northeastern Forest and Northwestern Forest followed by Mackenzie District.

Notes: This map displays the increase in annual and winter temperature trends by climate region and provides a visual representation of the distribution of treed area. The long-term temperature trend refers to the linear trend in temperature departures from the 1961 to 1990 climate normal over the period of 1948 to 2017. Positive values indicate that temperatures have warmed. Data for forest area are available from the National Forest Inventory by ecozone and have been adjusted to provide climate region totals. Treed area is different from forest area—the former includes areas with trees on non-forest land use areas (e.g., agricultural or urban lands) while forest area includes lands that are temporarily unstocked with trees (e.g., after disturbance or harvesting) and that are expected to regenerate. Non-inventoried land includes the Arctic ecozones (Arctic Cordillera, Northern Arctic, Southern Arctic) and small portions of the Taiga Plains and Hudson Plains ecozones located in Nunavut—areas that are largely devoid of tree cover.

Sources: Statistics Canada, Environment, Energy and Transportation Statistics Division, 2018; Environment and Climate Change Canada, 2017, "Annual 2016" and "Winter 2016-2017," Climate Trends and Variations Bulletin, www.ec.gc.ca/sc-cs/default.asp?lang=En&n=A3837393-1 (accessed December 5, 2017); Canada's National Forest Inventory (NFI), 2016, Grouped kNN Map layers, http://tree.pfc.forestry.ca, (accessed April 7, 2017); NFI, 2013, Table 4.1 Area (1000 ha) of forest and non-forest land by terrestrial ecozone in Canada, revised 2006 baseline, Version 3, December 2013, https://nfi.nfis.org/en/standardreports (accessed April 7, 2017).