Premium
Diurnal variation of the OH concentration in ambient air
Author(s) -
Shirinzadeh B.,
Wang Charles C.,
Deng D. Q.
Publication year - 1987
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl014i002p00123
Subject(s) - daytime , diurnal temperature variation , atmospheric sciences , analytical chemistry (journal) , environmental science , range (aeronautics) , detection limit , molecule , chemistry , environmental chemistry , materials science , geology , chromatography , organic chemistry , composite material
OH concentrations in ambient air outside Ford Laboratory were measured in the months of July and August 1986 using the fluorescence technique at low pressures. The peak OH concentration was observed to be about 3 × 10 6 molecules/cm³; the daytime average OH concentration was found to be in the range of middle 10 5 molecules/cm³, and the nighttime average below the detection limit of 0.9 × 10 5 molecules/cm³. It is demonstrated that use of moving average may create the appearance of oscillatory behavior in the diurnal variations of the deduced OH concentration.