FAST-RESPONSE HUMIDITY MEASUREMENTS WITH THE PSYCHROMETRIC METHOD

Citation
Ja. Kalogiros et Cg. Helmis, FAST-RESPONSE HUMIDITY MEASUREMENTS WITH THE PSYCHROMETRIC METHOD, Journal of applied meteorology, 32(9), 1993, pp. 1499-1507
Citations number
25
Categorie Soggetti
Metereology & Atmospheric Sciences
ISSN journal
08948763
Volume
32
Issue
9
Year of publication
1993
Pages
1499 - 1507
Database
ISI
SICI code
0894-8763(1993)32:9<1499:FHMWTP>2.0.ZU;2-F
Abstract
A simple method for correcting the time series of a wet temperature se nsor characterized by slow response is presented in this paper. A firs t-order linear approximation of the heat transfer equation is used for correcting the wet temperature measurements. The sensor cutoff freque ncy is found by an easy experimental method using the phase spectrum b etween the wet temperature sensor and a much faster platinum thermomet er under low wind speeds (up to 3 m s-1) and relatively dry atmosphere (relative humidity 20%-40%). If such a correction is applied, the wet sensor output along with the computed vapor pressure time series usin g the psychrometric equation are considerably recovered.