Table 2.7
Average annual, average annual maximum and minimum monthly and variability of evapotranspiration and potential evapotranspiration by ecoprovince, 1979 to 2016


Table 2.7
Average annual, average annual maximum and minimum monthly and variability of evapotranspiration and potential evapotranspiration by ecoprovince, 1979 to 2016
Table summary
This table displays the results of Average annual. The information is grouped by Ecoprovince (appearing as row headers), Code, Average annual evapotranspiration , Average maximum monthly evapotranspiration, Average minimum monthly evapotranspiration, Evapotranspiration variability, Average annual potential evapotranspiration, Average maximum monthly potential evapotranspiration, Average minimum monthly potential evapotranspiration and Potential evapotranspiration variability, calculated using mm, km and CV units of measure (appearing as column headers).
Ecoprovince Code Average annual evapotranspiration Average maximum monthly evapotranspiration Average minimum monthly evapotranspiration Evapotranspiration variability Average annual potential evapotranspiration Average maximum monthly potential evapotranspiration Average minimum monthly potential evapotranspiration Potential evapotranspiration variability
mm km3 km3 CV mm km3 km3 CV
Canada Note ...: not applicable 257 18.86 0.36 1.10 561 43.05 -1.86 1.23
Northern Arctic Cordillera 1.1 89 4.37 -0.44 1.76 154 9.41 -1.00 2.04
Southern Arctic Cordillera 1.2 113 4.32 -0.36 1.32 227 11.36 -0.88 1.66
Sverdrup Islands 2.1 72 1.73 -0.16 1.54 295 7.26 -0.38 1.67
Ellesmere Basin 2.2 97 4.88 -0.37 1.66 265 16.33 -0.92 1.86
Victoria Lowlands 2.3 105 14.49 -1.41 1.47 328 51.59 -4.00 1.67
Parry Channel Plateau 2.4 120 6.19 -0.62 1.69 265 15.70 -1.34 1.90
Boothia–Foxe Shield 2.5 125 18.08 -1.47 1.29 315 63.71 -3.88 1.64
Baffin Uplands 2.6 121 4.90 -0.47 1.42 246 13.27 -1.10 1.76
Foxe–Boothia Lowlands 2.7 135 3.10 -0.25 1.37 295 8.75 -0.58 1.67
Amundsen Lowlands 3.1 142 12.49 -0.77 1.33 404 40.25 -2.85 1.53
Keewatin Lowlands 3.2 149 15.10 -0.73 1.25 394 50.43 -2.42 1.52
Ungava–Belcher 3.3 101 3.92 -0.72 1.26 388 20.14 -1.64 1.50
Mackenzie Foothills 4.1 200 4.62 0.03 1.18 515 11.20 -0.43 1.26
Great Bear Lowlands 4.2 176 14.77 0.01 1.20 499 45.37 -2.24 1.31
Hay–Slave Lowlands 4.3 320 17.50 0.52 1.07 647 33.74 -1.38 1.09
Western Taiga Shield 5.1 141 22.66 -0.76 1.14 495 85.83 -5.05 1.31
Eastern Taiga 5.2 150 13.09 0.34 0.89 508 50.90 -2.42 1.18
Labrador Uplands 5.3 205 11.13 0.65 0.84 515 31.21 -1.08 1.10
Whale River Lowland 5.4 114 3.04 -0.15 1.00 436 13.68 -0.91 1.29
Western Boreal Shield 6.1 275 34.38 1.33 1.02 649 75.18 -3.34 1.06
Mid-Boreal Shield 6.2 400 43.88 3.47 0.88 731 74.24 -0.65 0.91
Eastern Boreal Shield 6.3 311 23.10 2.59 0.77 639 47.84 -0.45 0.96
Newfoundland 6.4 373 9.03 0.99 0.78 793 16.07 1.18 0.73
Lake of the Woods 6.5 470 7.92 0.30 0.98 848 11.74 -0.08 0.88
Southern Boreal Shield 6.6 521 38.74 2.76 0.92 797 50.68 0.03 0.85
Appalachian–Acadian Highlands 7.1 488 12.19 0.40 1.07 756 14.74 -0.29 0.93
Northumberland Lowlands 7.2 535 4.98 0.20 1.04 907 6.14 0.14 0.82
Fundy Uplands 7.3 522 9.19 0.54 0.95 969 12.67 0.79 0.74
Great Lakes–St. Lawrence Lowlands 8.1 485 12.28 0.05 1.13 873 15.12 -0.22 0.85
Huron–Erie Plains 8.2 556 3.81 0.01 1.04 1005 4.47 0.00 0.76
Boreal Foothills 9.1 425 12.14 0.42 0.98 718 18.25 -0.77 0.98
Central Boreal Plains 9.2 378 47.72 0.52 1.15 720 74.15 -3.35 1.04
Eastern Boreal Plains 9.3 397 11.54 0.13 1.15 767 21.47 -0.75 1.02
Eastern Prairies 10.1 450 4.39 -0.06 1.33 841 5.94 -0.21 1.01
Parkland Prairies 10.2 411 23.35 -0.31 1.35 819 31.25 -1.20 1.02
Central Grassland 10.3 349 26.27 -0.19 1.21 905 47.72 -1.50 0.95
Northern Yukon Mountains 11.1 141 1.19 -0.05 1.39 415 3.43 -0.20 1.48
Old Crow–Eagle Plains 11.2 136 0.92 -0.03 1.41 453 2.82 -0.17 1.43
Ogilvie Mountains 11.3 151 2.72 -0.03 1.31 473 7.53 -0.32 1.31
Mackenzie–Selwyn Mountains 11.4 175 7.52 -0.13 1.24 462 19.77 -1.04 1.35
Wrangel Mountains 12.1 136 0.60 -0.02 1.22 353 1.84 -0.12 1.42
Northern Boreal Cordillera 12.2 207 12.27 0.42 1.08 536 29.70 -1.44 1.17
Southern Boreal Cordillera 12.3 221 8.98 0.25 1.03 531 21.06 -1.37 1.18
Western Boreal Cordillera 12.4 181 1.84 0.03 1.17 542 4.88 -0.15 1.16
Georgia Depression 13.1 598 2.38 0.20 0.77 805 3.08 -0.09 0.87
Southern Coastal Mountains 13.2 392 12.12 1.27 0.74 659 20.83 -0.75 0.92
Northern Coastal Mountains 13.3 203 1.09 0.00 1.05 455 2.91 -0.26 1.26
Northern Montane Cordillera 14.1 365 10.81 0.84 0.86 616 18.46 -1.16 1.06
Central Montane Cordillera 14.2 352 7.73 0.61 0.82 668 14.55 -0.52 0.95
Southern Montane Cordillera 14.3 420 5.82 0.32 0.89 746 9.48 -0.53 0.97
Columbia Montane Cordillera 14.4 417 16.85 1.04 0.86 693 27.65 -1.83 1.02
Hudson Bay Coastal Plains 15.1 206 3.31 0.06 1.04 544 8.23 -0.25 1.13
Hudson–James Lowlands 15.2 306 22.74 1.26 0.96 632 42.57 -1.07 1.00
... not applicable
Notes: Evapotranspiration is the process of evaporation from land surfaces and transpiration from plants. It is controlled by surface water availability and by meteorological variables such as net solar radiation, air temperature and humidity and wind speed. Potential evapotranspiration represents the evapotranspiration that would occur without limitations on water supply, and is therefore linked to the amount of energy available to generate evapotranspiration in a specific area and is independent of water supply. Variability is measured by using a coefficient of variation (CV) that allows the comparison of all months in all years of the 38-year time period. The CV of the data is a measure of the dispersion or variation in the monthly values over the period 1979 to 2016. It is defined as the ratio of the standard deviation of the monthly values to the mean. A higher CV indicates that the monthly data are more variable.
Sources: 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); Li, Z., S. Wang, and J. Li, 2020, “Spatial variations and long-term trends of potential evapotranspiration in Canada,” Scientific Reports, Vol. 10, no. 22089, https://doi.org/10.1038/s41598-020-78994-9 (accessed February 3, 2021); Wang, S., et al., 2014, “Assessment of water budget for sixteen large drainage basins in Canada,” Journal of Hydrology, Vol. 512, pp. 1-15, https://doi.org/10.1016/j.jhydrol.2014.02.058 (accessed December 11, 2020).
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