Search Records

Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a map that shows the annual sum of normal degree-days above 5 C (an indicator of total heat available for plants in the growing season). Data for period 1941 to 1970. Companion sheet to Frost-Free Period, Heating...

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.

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...

Contained within the 5th Edition (1978 to 1995) of the National Atlas of Canada is a sheet which contains ten maps in all, comprising sets of five maps for each of January and July. Each set consists of a large map showing mean daily temperature and its variability, and four small maps showing...

Contained within the 5th Edition (1995) of the Atlas of Canada is a sheet which contains ten maps in all, comprising sets of five maps for each of April and October. Each set consists of a large map showing mean daily temperature and its variability, and four small maps showing mean daily maximum...

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...

The map shows the mean January daily temperature based on the 30-year period 1941-1970. The lowest mean January daily temperatures are below -35 degrees Celsius and are located on Ellesmere Island and on Axel Heiberg Island and south of the Boothia Peninsula in Nunavut. The highest mean January...

The map shows the location of the air temperature measurement stations. Fragmentary meteorological reports were prepared and published by European explorers in the North American Arctic during the late 16th and 17th centuries. Many employees of the Hudson's Bay Company kept careful observations...

The map shows the mean daily temperatures based on the 30-year period 1941-1970 for the warmest month in Canada. Although, the most direct and the most intense incoming solar radiation occurs in June, there is a lag in the warming of the Earth’s surface. As a result the warmest month in Canada is...

The plate contains four maps: (1) map of the global solar radiation network and sunshine recorder network; (2) annual global solar radiation; (3) June cloudless day radiation; and (4) mean annual net radiation. Stations recorded data to the end of 1970. Solar and net radiation are measured from a...