gesjGEOGRAPHY, ENVIRONMENT, SUSTAINABILITYGEOGRAPHY, ENVIRONMENT, SUSTAINABILITY2071-93882542-1565Russian Geographical Society10.24057/2071-9388-2019-72gesj-905Research ArticleSPECIAL ISSUE "Urban environmental geography: Mosсow and other megacities"Aerosol and Its Radiative Effects during the Aeroradcity 2018 Moscow ExperimentChubarovaNatalia E.

Faculty of Geography

119991, Moscow

natalia.chubarova@gmail.comAndrosovaElizaveta E.

Faculty of Geography

119991, Moscow

KirsanovAlexandr A.

11-13, B. Predtechensky per., Moscow, 123242

VogelBernhard

Karlsruhe

VogelHeike

Karlsruhe

PopovichevaOlga B.

Faculty of Physics

119991, P.O. Box 3640 76021, Moscow

RivinGdali S.

11-13, B. Predtechensky per., Moscow, 123242; Faculty of Geography, 119991, Moscow

Moscow State UniversityRussian FederationHydrometeorological Centre of RussiaRussian FederationKarlsruhe Institute of TechnologyGermanyHydrometeorological Centre of Russia; Moscow State UniversityRussian Federation201930122019124114131Copyright © Chubarova N.E., Androsova E.E., Kirsanov A.A., Vogel B., Vogel H., Popovicheva O.B., Rivin G.S., 20192019Chubarova N.E., Androsova E.E., Kirsanov A.A., Vogel B., Vogel H., Popovicheva O.B., Rivin G.S.Chubarova N.E., Androsova E.E., Kirsanov A.A., Vogel B., Vogel H., Popovicheva O.B., Rivin G.S.This work is licensed under a Creative Commons Attribution 4.0 License.https://ges.rgo.ru/jour/article/view/905

During the AeroRadCity-2018 spring aerosol experiment at the Moscow State University Meteorological Observatory the aerosol properties of the atmosphere and radiative aerosol effects were analyzed using a wide complex of measurements and model COSMO-ART simulations over Moscow domain. The program of measurements consisted of columnar aerosol AERONET retrievals, surface PM10, black carbon (BC) and aerosol gas precursors mass concentrations, as well as radiative measurements under various meteorological conditions. We obtained a positive statistically significant dependence of total and fine aerosol optical depth (AOD) mode (R2 ~0.4) with PM concentrations. This dependence has revealed a pronounced bifurcation point around PM10=0.04 mgm-3. The modelled BC concentration is in agreement with the observations and has a pronounced correlation with PM, but not with the AODs. The analysis of radiative effects of aerosol has revealed up to 30% loss for UV irradiance and 15% - for shortwave irradiance at high AOD in Moscow. Much intensive radiation attenuation is observed in the afternoon when remote pollution sources may affect solar fluxes at elevated boundary layer conditions. Negative (cooling) radiative forcing effect at the top of the atmosphere from -18 Wm-2 to -4 Wm-2 has been evaluated. Mean difference in visible AOD between urban and background conditions in Moscow and Zvenigorod was about 0.01 according to measurements and model simulations, while in some days the difference may increase up to 0.05. The generation of urban aerosol was shown to be more favorable in conditions with low intensity of pollutant dispersion, when mean deltaAOD550 was doubled from 0.01 to 0.02.

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The authors declare that there are no conflicts of interest present.