Climatological and Geographical Characteristics within Inversion Layers in the Presence of High NO_2 Concentration
Source: Water, Air, and Soil Pollution, Volume 130, Numbers 1-4, August 2001 , pp. 343-348(6)
Abstract:High concentrations of NO_2 may accumulate in the upper regions of the atmospheric inversion layers. In this study, the climatological and geographical characteristics of two cases where a high nighttime NO_2 concentration appeared in the inversion layer were studied, one on a slope on the Seto Inland Seacoast and in the Saijo Basin. On the Seto Inland Seacoast, the inversion layer appeared at 160 m a.s.l. There were remarkable differences in the concentration of NO_2 and saturation deficit across the boundary of the inversion layer. In Saijo Basin, the inversion layer covered almost the whole basin up to 500 m a.s.l. The cold air lake appearing below 290 m contained an especially high level of humidity and NO_2 concentration. In conclusion, it appears that the inversion layer plays a significant role as a cover preventing atmospheric NO_2 from diffusing outside the layer. In both cases, it seemed that the water vapor pressure almost reached saturation in the high NO_2 concentration zone.
Document Type: Regular Paper
Affiliations: 1: Faculty of Agriculture, Tokyo University of Agriculture and Technology, Fuchu 183-8509, Japan e-mail: email@example.com 2: Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 739-8521, Japan
Publication date: August 1, 2001