Complex aerosol experiment at the Middle Urals. Part 2. Aerosol characteristics in the near-ground atmospheric layer
V.A. Poddubnyi1, V.V. Pol'kin2, S.M. Sakerin2, L.P. Golobokova3, A.P. Luhzetskaya1, Yu.I. Markelov1, E.S. Dubinkina1, O.I. Khuriganova3
1Institute of Industrial Ecology Ural branch of RAS, 20a, str. Sof'i Kovalevskoj, GSP-594, 620219, Ekaterinburg
2V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
3Limnological Institute of the Siberian Branch of the RAS, 3, Ulan-Batorskaya str., 664033, Irkutsk, Russia
Keywords: концентрация, аэрозоль, В«сажаВ», мелкодисперсная и грубодисперсная фракция, ионный состав, газообразные примеси, concentration, aerosol, black carbon, fine and coarse fractions, ionic composition, gaseous impurities
Abstract
We carry out a comparative analysis of optical, microphysical, and chemical characteristics of aerosol, measured simultaneously in two Middle Ural regions: Yekaterinburg and Kaurovka astronomical observatory (background region). For most aerosol characteristics, the average values in urban zone are found to significantly exceed those in the background region; in particular, black carbon content is higher by a factor of 3.4, number concentration of large particles ( r > 0.5 mm) is higher by a factor of 1.57, and aerosol mass concentration is higher by a factor of 1.36. An exception is ion composition of aerosol: concentrations of some ions are higher in Yekaterinburg, while concentrations of most other ions are higher in the background region. Among the main results, there is an identified “city-background” difference in the diurnal behavior of aerosol microphysical characteristics. A characteristic urban feature is minimal concentration of large particles and black carbon at midnight (04:00 LT), which can be explained by reduced effect of traffic and other technogenic sources.
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