Impact of Continuous Cropping on the Diurnal Range of Dew Point Temperature during the Foliar Expansion Period of Annual Crops on the Canadian Prairies
Table 2
Rate of change of the average decadal mean daily dew point temperature () and decadal averages and standard deviations of dew point temperatures for climate stations representing selected ecodistricts in the Canadian Prairies for the 1960s to the 2000s.
Climatic zone
Weather station
Rate of change (°C decade−1)
Decadal average and standard deviation of dew point temperature (°C)
1960s
1970s
1980s
1990s
2000s
Subhumid
Calgary
0.20
6.6 ± 1.2n
6.1 ± 1.6n
6.4 ± 1.8n
7.7 ± 1.4w
7.8 ± 1.4w
Edmonton
0.10
8.3 ± 1.1d
9.4 ± 1.5w
9.0 ± 1.5w
9.4 ± 1.2w
8.9 ± 1.5d
Grande Prairie
0.01
7.2 ± 1.1n
7.4 ± 0.9n
7.4 ± 2.0n
8.5 ± 1.2w
7.1 ± 1.1n
Prince Albert
0.19
9.5 ± 1.9d
10.4 ± 1.2w
9.5 ± 0.7n
9.8 ± 1.7w
10.3 ± 1.3n
Red Deer
0.06
7.9 ± 0.9d
7.8 ± 1.4n
8.8 ± 1.5n
8.5 ± 1.6w
8.5 ± 1.3n
The Pas
0.06
9.6 ± 2.0d
10.8 ± 0.9w
9.7 ± 1.1n
10.3 ± 2.0w
10.4 ± 1.4w
Winnipeg
0.42
10.9 ± 2.2n
11.9 ± 1.4w
12.2 ± 1.5d
13.0 ± 1.9n
13.0 ± 1.5w
Semiarid
Estevan
0.16
10.9 ± 2.2n
11.2 ± 1.1w
10.3 ± 1.0d
11.6 ± 1.4w
11.9 ± 1.7w
Lethbridge
0.19
7.8 ± 0.9d
6.8 ± 1.7w
6.9 ± 1.7d
8.6 ± 1.6w
7.8 ± 2.2n
Medicine Hat
0.16
8.3 ± 1.2d
8.1 ± 1.8w
7.8 ± 1.9d
8.8 ± 0.9w
8.9 ± 1.8n
Moose Jaw
0.41
9.2 ± 2.2n
9.9 ± 1.3w
9.2 ± 1.2d
10.6 ± 1.6w
11.1 ± 1.7w
Regina
0.32
9.7 ± 1.9n
9.9 ± 1.4w
9.2 ± 1.0d
10.7 ± 2.0w
11.2 ± 2.2w
Saskatoon
0.47
8.8 ± 1.9d
9.6 ± 1.6w
9.0 ± 1.0d
10.2 ± 1.7w
11.1 ± 1.3n
Ecodistricts experiencing dry, normal, and wet growing season based on decadal average of total precipitation compared to 30-year normal precipitation from the start of the growing season (DOY 91) to the peak of foliar expansion period of annual crops (DOY 195).