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135 records found
  • Federal

    Wind and Sunshine

    Contained within the 3rd Edition (1957) of the Atlas of Canada is a plate consisting of four maps, two showing wind and two showing sunshine. On the wind maps, the percentage frequency of the wind for winter and summer from each direction is represented by means of wind roses. Wind roses show...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Precipitation Days and Precipitation Variability

    Contained within the 3rd Edition (1957) of the Atlas of Canada is a plate with three maps that show the mean annual number of days with measurable precipitation, the mean annual number of days with measurable snowfall, and the variability of annual precipitation. A day with sufficient measurable...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Climatic Regions Thornthwaite Classification Moisture Regions

    Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a map that shows the distribution for the two moisture aspects of Thornthwaite's climate classification system. The moisture regions are shown as coloured areas representing six moist and three dry climates; and...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Climatic Regions Thornthwaite Classification Thermal Efficiency Regions

    Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a map that shows the distribution for the two thermal aspects of Thornthwaite's climate classification system. There is thermal efficiency (a measure of heat received at the ground) shown as coloured areas in five...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Humidity and Fog

    Contained within the 3rd Edition (1957) of the Atlas of Canada is six maps that show the humidity and fog occurrences across Canada. Two maps on the top that show the mean mixing ratios for January and July, respectively. Mixing ratio is defined as the ratio of the mass of the water vapor to the...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Seasonal Precipitation

    Contained within the 3rd Edition (1957) of the Atlas of Canada is a plate that shows four maps of the mean precipitation for spring (March to May), summer (June to August), fall (September to November) and winter (December to February). The total precipitation for any season is the sum of the...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Typical Weather Situations

    Contained within the 3rd Edition (1957) of the Atlas of Canada is a map that shows the typical weather situations by means of four surface weather maps: for February 18th, circa 1954; April 19th, circa 1955; July 3rd, circa 1955; and October 12th, circa 1954. All maps are based on data of 1:30...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Canada - Frost-Free Period

    Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a map that shows the average length of the frost-free period for all parts of Canada. Data for period 1941 to 1970. Companion sheet to Heating Degree-Days, Growing Degree-Days, Last Frost in Spring and First Frost...
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Canada - Last Frost in Spring

    Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a map that shows average date of occurrence of the last frost in spring. Data for period 1941 to 1970. Companion sheet to Frost-Free Period, Heating Degree-Days, Growing Degree-Days and First Frost in Autumn.
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
  • Federal

    Solar Radiation - Annual

    Contained within the 5th Edition (1995) of the Atlas of Canada is a plate with two maps. The first map shows solar radiation and its variability recorded on a horizontal surface. The second map shows solar radiation recorded on inclined surfaces.
    Organization:
    Natural Resources Canada
    Resource Formats:
    • JPG
    • PDF
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