Statistical Analysis of Subsurface Diffusion of Solar Energy with Implications for Urban Heat Stress
Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=47101#.VGGJSmfHRK0 Author(s) M. P. Silverman Affiliation(s) Department of Physics, Trinity College, Hartford, USA . ABSTRACT Analysis of hourly underground temperature measurements at a medium-size (by population) US city as a function of depth and extending over 5+ years revealed a positive trend exceeding the rate of regional and global warming by an order of magnitude. Measurements at depths greater than ~2 m are unaffected by daily fluctuations and sense only seasonal variability. A comparable trend also emerged from the surface temperature record of the largest US city (New York). Power spectral analysis of deep and shallow subs...