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Urban aerosol and its radiative effects in Moscow Megacity according to the ground-based and satellite MODIS/MAIAC) measurements, and COSMO-ART modellingтезисы доклада
- Авторы: Chubarova Natalia, Androsova Elizaveta, Zhdanova Ekaterina, Kirsanov Alexander, Bernhard Vogel, Heike Vogel, Lyapustin Alexei I.Gdaly Rivin
- Сборник: 19th AeroCom and the 8th AeroSAT workshops October 12 – 16 2020
- Тезисы
- Год издания: 2020
- Аннотация: We analyzed the urban aerosol properties using the results of the AeroRadCity urban aerosol experiment during spring 2018 and 2019, which included the intensive measurement campaign at the Moscow State University Meteorological Observatory and parallel model simulations using chemical transport COSMO-ART model (Vogel et al., 2010) as well as satellite aerosol optical depth (AOD) retrievals using MODIS-MAIAC datasetfor the 2000-2017period over Moscow megacity. We showed different types of the surface/columnar aerosol dependence under various meteorological conditions, and the interaction of columnar aerosol absorbing properties with black carbon aerosolmeasurements only in conditions with high level of particle dispersion intensity. Model and experimental data demonstrated positiveBC relationships with PM10, NO2 and SO2. Theanalysis of radiative effects of aerosol in the clear sky atmosphere has revealed up to 30% loss for UVirradiance and 15% - for shortwave irradiance at high AOD with largerattenuation in conditions of elevatedboundary layer(Chubarova et al., 2019). Negative (cooling) RF effect at TOA varied from -20 Wm-2to -1 Wm-2with average of -8 Wm-2. Theapplication of the MAIAC algorithm over the whole Moscowregion has revealed a decreasing AOD trend over the centerof Moscow and an increasing trend over the “New” Moscowterritory, which experienced an intensive build-up and agriculturaldevelopment.Accordingto the MAIAC dataset, the most pronounced spatial AODdifferences (of about 0.05–0.06)over the territory of Moscow were observed atthe 5% quantile level overseveral locations and could be attributed to the stationarysources of aerosol pollution (Zhdanova et al., 2020).For the ground-based AERONET measurements, the difference (deltaAOD)betweenmedian aerosol optical depth at the Moscow_MO_MSU and at the background Zvenigorodsite has a statisticallysignificant positive bias for most years, and an averagedeltaAODof about 0.02 while according to the MAIAC dataset, thedeltaAOD varied within 0.01 and was not statistically significant. The urban AOD550 calculations using the COSMO-ART modelhave shown a difference of about dAOT= 0.017 between Moscow and Zvenigorod in clear sky conditionsin accordance with measurements,but have a significant overestimation in the cloudy atmosphere. This research has been supported by the RussianScience Foundation (grant no. 18-17-00149).
- Добавил в систему: Чубарова Наталья Евгеньевна