Abstract
Abstract
Ambient temperature fluctuations are of importance in a wide variety of scientific and technological arenas. In a series of experiments carried out in our laboratory over an 18-month period, we discovered that these fluctuations exhibit 1/f
3 spectral behavior over the frequency range 1.0 × 10−5 ≤ f ≤ 2.5 × 10−2 Hz, corresponding to 40 s ≤ T
f
≤ 1.2 d, where T
f
= 1/f. This result emerges over a broad range of conditions. For longer time periods, 1.2 < T
f
≤ 11.6 d, corresponding to the frequency range 1.0 × 10−6 ≤ f < 1.0 × 10−5 Hz, we observed 1/f
2 spectral behavior. This latter result is in agreement with that observed in data collected at European weather stations. Scalograms computed from our data are consistent with the periodograms.
Subject
General Physics and Astronomy