| Title | Median Start Date of Continuous Snow Cover / Date médiane dapparition de la couverture neigeuse continue |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Atlas of Canada |
| Source | Atlas of Canada, Reference Map Series 6357, 2010, 2 sheets, https://doi.org/10.4095/301012  Open Access |
| Year | 2010 |
| Publisher | Natural Resources Canada |
| Edition | 6 |
| Document | serial |
| Lang. | English; French |
| Maps | 2 maps |
| Map Info. | location, 1:7,500,000 |
| Projection | Lambert Conformal Conic Projection (NAD83) |
| Media | paper; on-line; digital |
| Related | This publication is related to the
following publications |
| File format | pdf; jpg; jp2; xml |
| Province | British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut; Canada |
| NTS | 1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65;
66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560 |
| Lat/Long WENS | -141.0000 -50.0000 90.0000 41.7500 |
| Subjects | environmental geology; Nature and Environment; Snow; Animals |
| Released | 2010 12 31 |
| Abstract | This map shows the median date of snow-cover onset (defined as the first date with 14 consecutive days of snow cover greater than 2 centimetres in depth) computed over 18 winter seasons (1979 to 1997).
In areas with permanent or semipermanent snow cover (for example, Arctic ice caps) or in areas with irregular or ephemeral snow cover (coastal British Columbia), researchers were unable to compute the median values. The main feature of the map is the
rapid southward extension of snow cover over Canada during the September to December period. The moderating influence of Hudson Bay can be seen over northern Quebec, where snow cover starts later than in the equivalent latitudes west of Hudson Bay.
The date of snow-cover onset has important implications for animals that rely on snow cover for shelter, as well as climatic influences on air temperature, ground freezing and lake ice formation. |
| Summary | (Plain Language Summary, not published)
The map was originally published online in the Atlas of Canada, 6th Edition as an interactive digital map derived from a shapefile and mapped online
using MapServer, a platform for publishing spatial data to the web. In order to preserve the geographical content of this Edition during its publication from 1999 to 2009 all the maps have been converted from their online interactive form to a raster
and made available in PDF and JPEG. |
| GEOSCAN ID | 301012 |
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