Table 1.
Snow classes and snow cover area in million km2 for January, April, July and October months from 2007 to 2011.
| Class |
2011_01 |
2010_01 |
2009_01 |
2008_01 |
2007_01 |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Area | % | Area | % | Area | % | Area | % | Area | % | ||||||
| Very low snow | 21.9 | 36.4 | 21.4 | 35.7 | 22.2 | 37.0 | 21.7 | 36.2 | 24.3 | 40.6 | |||||
| Low snow | 13.4 | 22.3 | 13.2 | 21.9 | 15.1 | 25.1 | 14.8 | 24.7 | 13.2 | 22.1 | |||||
| Medium snow | 11.5 | 19.1 | 11.2 | 18.7 | 11.2 | 18.7 | 11.9 | 19.9 | 11.4 | 19.0 | |||||
| High snow | 7.5 | 12.5 | 8.6 | 14.4 | 6.7 | 11.1 | 6.7 | 11.2 | 6.3 | 10.5 | |||||
| Very high snow | 4.3 | 7.2 | 4.4 | 7.3 | 3.7 | 6.1 | 3.5 | 5.8 | 3.6 | 5.9 | |||||
| Extreme snow | 1.5 | 2.5 | 1.2 | 2.0 | 1.2 | 1.9 | 1.3 | 2.2 | 1.2 | 1.9 | |||||
| Total snow | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | |||||
| RPI | 264.9 | 264.9 | 264.9 | 264.9 | 264.9 | ||||||||||
| Total | 324.8 | 324.8 | 324.8 | 324.8 | 324.8 | ||||||||||
|
2011_04 |
2010_04 |
2009_04 |
2008_04 |
2007_04 |
|||||||||||
| Class | Area | % | % | Area | % | % | Area | % | % | Area | % | % | Area | % | % |
| Very low snow | 10.7 | 27.8 | 17.8 | 8.6 | 24.2 | 14.3 | 8.8 | 24.3 | 14.7 | 9.5 | 26.6 | 15.9 | 9.6 | 26.7 | 16.0 |
| Low snow | 9.8 | 25.6 | 16.4 | 8.9 | 25.1 | 14.8 | 8.9 | 24.5 | 14.8 | 8.8 | 24.6 | 14.6 | 9.3 | 25.8 | 15.5 |
| Medium snow | 7.7 | 20.0 | 12.8 | 8.3 | 23.5 | 13.9 | 8.2 | 22.6 | 13.7 | 7.4 | 20.6 | 12.3 | 7.5 | 20.9 | 12.6 |
| High snow | 5.5 | 14.4 | 9.2 | 6.0 | 16.8 | 9.9 | 5.9 | 16.3 | 9.9 | 5.9 | 16.5 | 9.8 | 5.3 | 14.6 | 8.8 |
| Very high snow | 3.5 | 9.1 | 5.8 | 2.9 | 8.1 | 4.8 | 3.3 | 9.2 | 5.6 | 3.2 | 9.0 | 5.4 | 3.3 | 9.1 | 5.5 |
| Extreme snow | 1.1 | 3.0 | 1.9 | 0.8 | 2.2 | 1.3 | 1.1 | 3.1 | 1.9 | 0.9 | 2.6 | 1.6 | 1.1 | 2.9 | 1.8 |
| Total snow | 38.4 | 100.0 | 64.0 | 35.4 | 100.0 | 59.0 | 36.2 | 100.0 | 60.5 | 35.8 | 100.0 | 59.6 | 36.1 | 100.0 | 60.1 |
| No snow | 21.6 | 36.0 | 24.6 | 41.0 | 23.7 | 39.5 | 24.2 | 40.4 | 23.9 | 39.9 | |||||
| Total classes | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | |||||
| RPI | 264.9 | 264.9 | 264.9 | 264.9 | 264.9 | ||||||||||
| Total | 324.8 | 324.8 | 324.8 | 324.8 | 324.8 | ||||||||||
|
2011_07 |
2010_07 |
2009_07 |
2008_07 |
2007_07 |
|||||||||||
| Class | Area | % | % | Area | % | % | Area | % | % | Area | % | % | Area | % | % |
| Low snow | 1.5 | 73.4 | 2.5 | 1.1 | 66.2 | 1.8 | 1.3 | 69.9 | 2.2 | 1.1 | 72.4 | 1.8 | 1.1 | 70.9 | 1.9 |
| Medium snow | 0.4 | 18.8 | 0.7 | 0.3 | 20.3 | 0.5 | 0.3 | 18.3 | 0.6 | 0.3 | 19.7 | 0.5 | 0.3 | 21.5 | 0.6 |
| High snow | 0.1 | 5.8 | 0.2 | 0.2 | 9.2 | 0.2 | 0.2 | 8.1 | 0.2 | 0.1 | 5.9 | 0.1 | 0.1 | 5.1 | 0.1 |
| Very high snow | 0.0 | 1.9 | 0.1 | 0.1 | 4.3 | 0.1 | 0.1 | 3.8 | 0.1 | 0.0 | 2.0 | 0.0 | 0.0 | 2.5 | 0.1 |
| Total snow | 2.1 | 100.0 | 3.5 | 1.6 | 100.0 | 2.7 | 1.9 | 100.0 | 3.1 | 1.5 | 100.0 | 2.5 | 1.6 | 100.0 | 2.6 |
| No snow | 57.9 | 96.6 | 58.4 | 97.3 | 58.2 | 96.9 | 58.5 | 97.5 | 58.4 | 97.4 | |||||
| Total classes | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | |||||
| RPI | 264.8 | 264.8 | 264.8 | 264.8 | 264.8 | ||||||||||
| Total | 324.8 | 324.8 | 324.8 | 324.8 | 324.8 | ||||||||||
|
2011_09 |
2010_10 |
2009_10 |
2008_10 |
2007_10 |
|||||||||||
| Class | Area | % | % | Area | % | % | Area | % | % | Area | % | % | Area | % | % |
| Low snow | 2.6 | 59.6 | 4.3 | 7.4 | 54.0 | 12.4 | 11.0 | 62.0 | 18.4 | 7.3 | 54.1 | 12.2 | 7.4 | 52.2 | 12.3 |
| Medium snow | 1.2 | 28.4 | 2.1 | 4.4 | 31.7 | 7.3 | 4.4 | 24.8 | 7.4 | 3.5 | 26.2 | 5.9 | 4.4 | 31.1 | 7.3 |
| High snow | 0.4 | 8.1 | 0.6 | 1.7 | 12.5 | 2.9 | 1.9 | 10.9 | 3.2 | 2.0 | 15.0 | 3.4 | 1.8 | 12.6 | 3.0 |
| Very high snow | 0.1 | 2.8 | 0.2 | 0.3 | 1.8 | 0.4 | 0.4 | 2.0 | 0.6 | 0.6 | 4.1 | 0.9 | 0.5 | 3.5 | 0.8 |
| Extreme snow | 0.1 | 1.2 | 0.1 | 0.0 | 0.0 | 0.0 | 0.1 | 0.3 | 0.1 | 0.1 | 0.5 | 0.1 | 0.1 | 0.6 | 0.2 |
| Total snow | 4.3 | 100.0 | 7.2 | 13.7 | 100.0 | 22.9 | 17.8 | 100.0 | 29.7 | 13.5 | 100.0 | 22.5 | 14.2 | 100.0 | 23.6 |
| No snow | 55.7 | 92.8 | 46.2 | 77.1 | 42.2 | 70.3 | 46.5 | 77.5 | 45.8 | 76.4 | |||||
| Total classes | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 60.0 | 100.0 | 59.9 | 100.0 | |||||
| RPI | 264.9 | 264.9 | 264.9 | 264.9 | 264.9 | ||||||||||
| Total | 324.8 | 324.8 | 324.8 | 324.8 | 324.8 | ||||||||||