✦ LIBER ✦

Inertial subrange correlation between temperature and humidity fluctuations in the unstable surface layer above vegetated terrains

✍ Scribed by W. Kohsiek

Publisher: Springer
Year: 1984
Tongue: English
Weight: 716 KB
Volume: 29
Category: Article
ISSN: 0006-8314
DOI: 10.1007/bf00119789

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✦ Synopsis

Observations of the temperature-humidity cospectrum and correlation spectrum were made with a cold platinum wire and a Ly-a hygrometer at 3.7 and 10 m above vegetated surfaces during unstable atmospheric conditions. It was found theoretically that a separation 6 between the temperature and humidity sensors causes a drop-off of the correlation spectrum at wavenumbers > 0.3 6-'. The observed drop-off follows the theoretical one reasonably well. Measurements made with the temperature sensor placed in the center of the Ly-a gap reveal a f-5/3 dependence of the temperature-humidity cospectrum in the inertial subrange up to frequencies of20 Hz. The drop-off at higher frequenties is thought to be caused by limitations inherent to the Ly-a humidiometer.

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