Accession Number : AD0450060

Title :   ANALYSIS OF ANNUAL VARIATIONS IN GROUND TEMPERATURE AT AN OTTAWA SITE,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF BUILDING RESEARCH

Personal Author(s) : Gold, L. W.

Report Date : 12 FEB 1964

Pagination or Media Count : 12

Abstract : Observations over a 5-year period at a site at Ottawa showed that the ground temperature had significant Fourier components which period 1/2 and 2 years. The average annual ground temperature and amplitudes of the Fourier components of period 1 year and 1/2 year underwent non-periodic fluctuations of almost 1 C degree at a depth of 10 cm. The amplitude of this fluctuation decreased with depth, and its maximum occurred later in time. There was evidence of a gradual increase in average annual ground temperature amounting to about 0.2 C degree over the 5-year period at the 610-cm depth. The significance of such small temperature changes in areas where the ground temperature is close to 0 C is point out. (Author)

Descriptors :   *SURFACE TEMPERATURE, HEAT TRANSFER, MEASUREMENT, FOURIER ANALYSIS, INSTRUMENTATION, THERMOCOUPLES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE