Next Article in Journal
Urban Aerosol Particle Size Characterization in Eastern Mediterranean Conditions
Previous Article in Journal
Variations in Greenhouse Gas Fluxes in Response to Short-Term Changes in Weather Variables at Three Elevation Ranges, Wakiso District, Uganda
Open AccessArticle

Aerosol Optical Depth of the Main Aerosol Species over Italian Cities Based on the NASA/MERRA-2 Model Reanalysis

1
CNR/ISAC, Unit of Lecce, 73100 Lecce, Italy
2
Università Politecnica delle Marche, UNIVPM/DIISM, 60131 Ancona, Italy
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(11), 709; https://doi.org/10.3390/atmos10110709
Received: 9 October 2019 / Revised: 29 October 2019 / Accepted: 6 November 2019 / Published: 14 November 2019
(This article belongs to the Special Issue Recent Advances of Air Pollution Studies in Italy)
The Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2) provides data at 0.5° × 0.625° resolution covering a period from 1 January 1980 to the present. Natural and anthropogenic aerosols are simulated in MERRA-2, considering the Goddard chemistry, aerosol, radiation, and transport model. This model simulates the sources, sinks, and chemistry of mixed aerosol tracers: dust, sea salt, hydrophobic and hydrophilic black carbon and organic carbon, and sulfate. MERRA-2 aerosol reanalysis is a pioneering tool for investigating air quality issues, noteworthy for its global coverage and its distinction of aerosol speciation expressed in the form of aerosol optical depth (AOD). The aim of this work was to use the MERRA-2 reanalysis to study urban air pollution at a national scale by analyzing the AOD. AOD trends were evaluated for a 30-year period (1987–2017) over five Italian cities (Milan, Rome, Cagliari, Taranto, and Palermo) in order to investigate the impacts of urbanization, industrialization, air quality regulations, and regional transport on urban aerosol load. AOD evolution predicted by the MERRA-2 model in the period 2002–2017 showed a generalized decreasing trend over the selected cities. The anthropogenic signature on total AOD was between 50% and 80%, with the largest contribution deriving from sulfate. View Full-Text
Keywords: aerosol optical depth; aerosol speciation; urban air pollution; MERRA-2 aerosol optical depth; aerosol speciation; urban air pollution; MERRA-2
Show Figures

Figure 1

MDPI and ACS Style

Rizza, U.; Mancinelli, E.; Morichetti, M.; Passerini, G.; Virgili, S. Aerosol Optical Depth of the Main Aerosol Species over Italian Cities Based on the NASA/MERRA-2 Model Reanalysis. Atmosphere 2019, 10, 709.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop