Length of growing season in British Columbia

Note: Some of the content spans wider than usual.

Baseline: 1971 to 2000

Growing season (1971 to 2000) in British Columbia

Description of this image follows.
Description - Growing season (1971 to 2000) in British Columbia

Map representing the length of growing season days based on current agricultural extent data (1971 to 2000) for British Columbia.

Current agricultural extent:

An area in the northeast corner of the province and a large area to the east of Williston Lake that extends to the Alberta border. A large band that begins inland of the Pacific coast to the northwest of Prince George and extends south and east to that city and then turns south and widens, continuing through the area around Kamloops and Kelowna to the U.S. border. Within this band, some small and medium-sized areas are excluded. Additional medium-sized areas are located to the east and west of this band, including an area to the west of its northern tip (inland from the Pacific coast), areas to the northwest and west of Kamloops, and two medium-sized bands that run in a southeasterly direction, parallel to the southeastern border with Alberta.

Also, the area around Vancouver and extending both towards Kelowna and northwards along the coast to the top of the Strait of Georgia. On Vancouver Island, most of its southern end and extending northwards along the Strait of Georgia coast and inland, as well as an area on the coast and inland at southern end of the Johnstone Strait. An area on the northern half of Haida Gwaii on its east coast and inland.

Baseline: 1971-2000 - Current agricultural extent: Growing season
Greater than
170 days
160 to 170
days
150 to 160
days
140 to 150
days
130 to 140
days
120 to 130
days
110 to 120
days
100-110
days
Less than
100 days
Southern (including: Kamloops, Kelowna, Vancouver, Abbotsford) Yes Yes Yes Yes Yes Yes Yes Yes Yes
Western (including: Vancouver, Island, Nanaimo, Victoria) Yes Yes Yes Yes Yes No No No No
Northern (including: Prince George) No No No Yes Yes Yes Yes Yes Yes

Climate change scenario: 2010 to 2039

Growing season (2010 to 2039) in British Columbia

Description of this image follows.
Description - Growing season (2010 to 2039) in British Columbia

Map representing the length of growing season days based on climate change scenario data (2010 to 2039) for British Columbia.

Current agricultural extent:

An area in the northeast corner of the province and a large area to the east of Williston Lake that extends to the Alberta border. A large band that begins inland of the Pacific coast to the northwest of Prince George and extends south and east to that city and then turns south and widens, continuing through the area around Kamloops and Kelowna to the United States border. Within this band, some small and medium-sized areas are excluded. Additional medium-sized areas are located to the east and west of this band, including an area to the west of its northern tip (inland from the Pacific coast), areas to the northwest and west of Kamloops, and two medium-sized bands that run in a southeasterly direction, parallel to the southeastern border with Alberta.

Also, the area around Vancouver and extending both towards Kelowna and northwards along the coast to the top of the Strait of Georgia. On Vancouver Island, most of its southern end and extending northwards along the Strait of Georgia coast and inland, as well as an area on the coast and inland at southern end of the Johnstone Strait. An area on the northern half of Haida Gwaii on its east coast and inland.

Climate change scenario: 2010 to 2039 - Current agricultural extent: Growing season
Greater than
170 days
160 to 170
days
150 to 160
days
140 to 150
days
130 to 140
days
120 to 130
days
110 to 120
days
100 to 110
days
Less than
100 days
Southern (including: Kamloops, Kelowna, Vancouver, Abbotsford) Yes Yes Yes Yes Yes Yes Yes Yes Yes
Western (including: Vancouver, Island, Nanaimo, Victoria) Yes Yes Yes Yes Yes No No No No
Northern (including: Prince George) No No No Yes Yes Yes Yes Yes Yes

Summary of length of growing season comparing 1971 to 2000 to projected climate change in 2010 to 2039

The Coupled Global Climate Model (CGCM 3.1) predicts a 1 degree Celsius increase in monthly average temperatures by 2010 to 2039, resulting in earlier crop seeding dates, and later fall frost dates in northern and interior regions of British Columbia.

Summary of length of growing season comparing 1971 to 2000 to projected climate change in 2010 to 2039
Length of
Growing Season (days)
1971 to 2000 Baseline
(Percent of total area)
2010 to 2039 CGCM 3.1
(Percent of total area)
> 170 7.6 16.2
160 to 170 1.9 7.5
150 to 160 2.8 18.2
140 to 150 3.5 20.1
130 to 140 7.9 8.0
120 to 130 16.8 6.0
110 to 120 15.3 8.1
100 to 110 10.0 5.6
< 100 34.2 10.3

Climate data and future scenario:

Limitations

Maps prepared by Agriculture and Agri-Food Canada's Science and Technology Branch (STB) in partnership with Environment Canada's National Service Office-Agriculture.

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