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Found 10 records similar to Median Start Date of Continuous Snow Cover

Federal

This map shows the median date of snow-cover loss (defined as the last 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 end date contours follow topography more closely than start date due to the influence of elevation on total snow accumulation and air temperature. The date of snow-cover loss has important implications for wildlife (for example, bird migration and nesting), vegetation, local climate and hydrology.

Last Updated: Mar. 14, 2022
Date Published: Dec. 31, 2010
Organization: Natural Resources Canada
Formats: JP2 other ZIP
Keywords:  environment, map, snow
Federal

Wapusk National Park is a sub-Arctic protected area covered with snow for over half of the year. Snowpack characteristics can provide important clues to impacts of climate change and park ecological integrity. Snow cover duration and characteristics affect soil and plant and animal components of the ecosystem. Current predictions for Wapusk are that with warming temperatures, snow in the Hudson Bay region will increase in amount but will stay for a shorter duration.

Last Updated: Jun. 6, 2018
Date Published: Oct. 1, 2017
Organization: Parks Canada
Formats: CSV
Keywords:  microclimate, snowpack, weather stations, year-round, snow depth, rain, wind speed, wind direction, air temperature
Federal

This map shows the average maximum snow depth in centimetres computed over 18 winter seasons (1979 to 1997). Over southern Canada this usually occurs in January or February, while the time of maximum accumulation occurs much later in mountain areas and in the Arctic. The main features of the map are the pronounced maximum in snow accumulation over the western Cordillera, where snow depths can exceed several metres, with a secondary maximum over Quebec and Labrador. These maxima are related to their proximity to oceans, which act as sources of moisture and winter storms, and to the orographic effect of the mountains in the case of western Canada.

Last Updated: Mar. 14, 2022
Date Published: Dec. 31, 2010
Organization: Natural Resources Canada
Formats: JP2 other ZIP
Keywords:  environment, map, snow
Federal

Contained within the 3rd Edition (1957) of the Atlas of Canada is a map that shows the snow cover data, referring primarily to the presence and total depth of a snow cover on the surface of the earth, across Canada. This is in contrast to data characteristics of snow cover depth, which increases by the occurrence of freshly fallen snow, but decreases by melting, wind action and settling. Two maps of these maps show the mean dates of the occurrence of first and last snow covers by one inch (2.54 cm) or greater. These are not necessarily the average dates to the beginning and ending of a continuous snow cover, since the snow cover may form and later disappear once or several times during a winter season.

Last Updated: Mar. 14, 2022
Date Published: Jan. 1, 1957
Organization: Natural Resources Canada
Formats: PDF JPG
Keywords:  climate, climate archives, meteorological data, meteorology, snow, weather
Federal

The map shows isolines on four different dates: 1) the day of the year when there are less than or equal to 2.5 centimetres of snow that occurs and remain absent for 7 or more days; 2) the standard deviation of the mean date of snow cover loss; 3) the day of year when greater than or equal to 2.5 centimetres of snow occur and remain for more than 7 days; and 4) the standard deviation of the mean date of snow cover formation. The beginning and end of the winter season in Canada is usually identified with the formation and disappearance of snow cover in autumn and spring respectively. The duration of snow cover varies considerably from year to year in the southern fringes of the country and adjacent to the east and west coasts. However, even in northern continental areas early and late snowfalls which leave an ephemeral snow cover are common.

Last Updated: Feb. 22, 2022
Date Published: Jan. 1, 1978
Organization: Natural Resources Canada
Formats: PDF JPG
Keywords:  climate, hydrology, precipitation, water balance
Federal

Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a plate with seven maps. The first map shows mean annual snowfall in Canada. Four additional maps show median snow depth for four separate months. The final two maps show snow cover and maximum snow depth.

Last Updated: Mar. 14, 2022
Date Published: Feb. 17, 1991
Organization: Natural Resources Canada
Formats: PDF JPG
Keywords:  climate, meteorology, precipitation, snow, weather
Federal

Nunavut lies in the Arctic, where cold temperatures mean that snow can fall at anytime in the year. Typically the ground is snow covered from September until June. Most of Nunavut has a dry Arctic climate receiving less than 200 centimetres of snow annually.

Last Updated: Mar. 14, 2022
Date Published: Dec. 31, 2010
Organization: Natural Resources Canada
Formats: JP2 other ZIP
Keywords:  demographic maps, map, snow
Federal

The integrated pan-Arctic snow melt onset dataset was generated by combining active and passive microwave satellite derived estimates for northern high latitude land surface, ice caps, large lakes, and sea ice (Wang et al., 2011). This dataset allows snow melt dynamics to be examined in a full pan-Arctic context and enables exploration of interactions between the terrestrial and marine components of the cryosphere. It provides a unique dataset for validating snow cover simulations from regional or global climate models during the spring transition period when snow cover exerts the strongest feedback to the climate system. The method used to generate the dataset can be found in the following reference:

Wang, L., G. J. Wolken, M. J.

Last Updated: Jul. 28, 2021
Date Published: Aug. 17, 2015
Organization: Environment and Climate Change Canada
Formats: TIFF
Keywords:  Snow Melt, Arctic, satellite, Climate change, Provide Climate Information Products and Services, Monitor Climate Parameters and Manage Data
Federal

The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The Snow cover indicators show how Canada's snow cover is changing from year-to-year and over time. Snow cover extent is expressed in millions of square kilometres and is presented for the spring months of April, May and June. Sixty-five percent of Canada's land mass has annual snow cover for more than 6 months of the year.

Last Updated: Jul. 12, 2018
Date Published: Feb. 27, 2018
Organization: Environment and Climate Change Canada
Formats: CSV HTML
Keywords:  Environmental indicators, Climate change, Snow, environmental indicators, air and climate, climate, climate change, Canadian Arctic, snow cover
Federal

This paper presents an analysis of observed and simulated historical snow cover extent and snow mass, along with future snow cover projections from models participating in the 6th phase of the World Climate Research Programme Coupled Model Inter-comparison Project (CMIP6). Where appropriate, the CMIP6 output is compared to CMIP5 results in order to assess progress (or absence thereof) between successive model generations. An ensemble of six observation-based products is used to produce a new time series of historical Northern Hemisphere snow extent anomalies and trends; a subset of four of these products is used for snow mass. Trends in snow extent over 1981-2018 are negative in all months, and exceed -50 x 103 km2 during November, December, March, and May.

Last Updated: Jul. 21, 2021
Date Published: May 5, 2020
Organization: Environment and Climate Change Canada
Formats: HTML
Keywords:  CMIP6, snow extent, snow mass, Climate, Climatology, meteorology, atmosphere, Weather and Climate
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