Vol. 22, issue 12, article # 2
Sakerin S. M., Kabanov D. M., Nasrtdinov I. M., Turchinovich S. A., Turchinovich Yu. S. Results of two-point experiments on estimating the anthropogenic urban effect on characteristics of atmospheric transparency. // Optika Atmosfery i Okeana. 2009. V. 22. No. 12. P. 1108-1113 [in Russian].Copy the reference to clipboard
Abstract:
To estimate the anthropogenic effect of Tomsk on the results of measurements of aerosol optical depth (АОD) and moisture content of the atmosphere in the east suburb (Akademgorodok), we discussed two issues: 1) comparative analysis of data of simultaneous measurements in suburban zone and in background region ( 60-km separation); and 2) dependence of aerosol turbidity in suburb on the direction of air mass transport. In addition to spectral atmospheric AODs, we also considered two AOD components, caused by the finely and coarsely dispersed aerosol. It is noted that the variations of atmospheric turbidity characteristics are mainly caused by synoptic-scale processes and are manifested themselves similarly in urban and background regions. At summertime, AOD and moisture content of the atmosphere in the two regions are statistically indistinguishable, indicating the absence of anthropogenic urban influence. In cold period, the suburban zone may be characterized by higher atmospheric turbidity, seemingly because of inversion accumulation of aerosol. The dependence of AOD on wind direction has the following features: 1) overall, the largest aerosol turbidities are observed during winds from the south sector; 2) in the cold period, the finely dispersed AOD component is, on the average, by 14% larger in the cases of transport from direction of the city (from west and north-west); and 3) the coarsely AOD component is a little larger during westward air transport than during eastward one.
Keywords:
spectral transmittance, aerosoloptical depth, columnar water vapor, town, background area