Reitan, Clayton Harold
M.S. (Master of Science)
Department of Geography
Climatic changes; Seasons--United States; Temperature
Seasons are defined in terms of the slope of the annual temperature curve. A method for approximating the seasonal progression of the curve's slope is explained and applied to several sets of daily temperature data, representing different time periods, for a midwestern station. With some modifications, the method is also applied to monthly mean data for a number of climatic divisions across the United States for the period 1931/80. It has been found that the dates of onset for the seasons change across both time and space. For the midwestern station, the shifting of the dates with time serves to emphasize the fact that both winter and summer have become cooler. For the United States as a whole, the range in the dates of onset point out the impact of regional climatic conditions on the annual march of temperature.
Fovell, Robert Gerard, "Dividing the year into seasons" (1983). Graduate Research Theses & Dissertations. 2274.
v, 62 pages
Northern Illinois University
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