Articles | Volume 22, issue 24
https://doi.org/10.5194/acp-22-15703-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-15703-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
15 Dec 2022
Research article |
| 15 Dec 2022
| 15 Dec 2022
Aerosol optical depth regime over megacities of the world
Kyriakoula Papachristopoulou
CORRESPONDING AUTHOR
Laboratory of Climatology and Atmospheric Environment, Sector of
Geography and Climatology, Department of Geology and Environment, National
and Kapodistrian University of Athens, Athens 15784, Greece
Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing,
National Observatory of Athens (IAASARS/NOA), Athens 15236, Greece
Department of Physics, ETH Zurich, Zurich 8093, Switzerland
Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC), Davos 7260, Switzerland
Ioannis-Panagiotis Raptis
Laboratory of Climatology and Atmospheric Environment, Sector of
Geography and Climatology, Department of Geology and Environment, National
and Kapodistrian University of Athens, Athens 15784, Greece
Antonis Gkikas
Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing,
National Observatory of Athens (IAASARS/NOA), Athens 15236, Greece
Ilias Fountoulakis
Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing,
National Observatory of Athens (IAASARS/NOA), Athens 15236, Greece
Akriti Masoom
Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC), Davos 7260, Switzerland
Stelios Kazadzis
Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center (PMOD/WRC), Davos 7260, Switzerland
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Cited
14 citations as recorded by crossref.
- Aerosol optical depth climatology from the high-resolution MAIAC product over Europe: differences between major European cities and their surrounding environments L. Di Antonio et al. 10.5194/acp-23-12455-2023
- Peculiar weather patterns effects on air pollution and COVID-19 spread in Tokyo metropolis M. Zoran et al. 10.1016/j.envres.2023.115907
- Optical and physical characteristics of aerosols over Asia: AERONET, MERRA-2 and CAMS K. Ansari & S. Ramachandran 10.1016/j.atmosenv.2024.120470
- Multi-Decadal Trends in Aerosol Optical Depth of the Main Aerosol Species Based on MERRA-2 Reanalysis: A Case Study in the Baltic Sea Basin E. Mancinelli et al. 10.3390/rs16132421
- Contrasting nature of aerosols over South Asian cities and its surrounding environment A. Pandey et al. 10.1016/j.envpol.2024.124622
- Comparison of satellite and ground-based measurements of erythemal dose from two tropical sites: Belo Horizonte (20° S, 44° W, 858 m) and Saint-Denis La Reunion (21° S, 55° E, 85 m) A. Silva 10.1007/s00704-024-05030-5
- Optical and particulate properties of dust aerosols in El Paso, Texas G. Ortiz et al. 10.1016/j.atmosres.2025.108127
- Identifying the Causes of Air Pollution in the Tehran Metropolis-Iran and Policy Recommendations for Sustainability A. Ghahremanlou & D. Ghahremanlou 10.1007/s41810-025-00303-6
- Dust Content Modulation and Spring Heat Waves in Senegal (2003–2022) S. Diouf et al. 10.3390/atmos15121413
- Improving AOD Algorithm Evaluation: A Spatial Matching Method for Minimizing Quality Control Bias B. Du et al. 10.3390/rs17071235
- Assessments for the Effect of Mineral Dust on the Spring Heat Waves in the Sahel P. Niane et al. 10.3390/atmos14091373
- 20 years of columnar aerosol properties at Valencia area (Eastern Spain) by ground-based sun-photometry M. Garcia-Suñer et al. 10.1016/j.atmosres.2023.107198
- Photovoltaics Energy Potential in the Largest Greek Cities: Atmospheric and Urban Fabric Effects, Climatic Trends Influences and Socio-Economic Benefits S. Vigkos & P. Kosmopoulos 10.3390/en17153821
- Influence of changes in anthropogenic and natural sources on global aerosol optical depth during COVID-19 lockdown: Ground-based observations, satellites, models S. Ramachandran & K. Ansari 10.1016/j.atmosenv.2024.120948
14 citations as recorded by crossref.
- Aerosol optical depth climatology from the high-resolution MAIAC product over Europe: differences between major European cities and their surrounding environments L. Di Antonio et al. 10.5194/acp-23-12455-2023
- Peculiar weather patterns effects on air pollution and COVID-19 spread in Tokyo metropolis M. Zoran et al. 10.1016/j.envres.2023.115907
- Optical and physical characteristics of aerosols over Asia: AERONET, MERRA-2 and CAMS K. Ansari & S. Ramachandran 10.1016/j.atmosenv.2024.120470
- Multi-Decadal Trends in Aerosol Optical Depth of the Main Aerosol Species Based on MERRA-2 Reanalysis: A Case Study in the Baltic Sea Basin E. Mancinelli et al. 10.3390/rs16132421
- Contrasting nature of aerosols over South Asian cities and its surrounding environment A. Pandey et al. 10.1016/j.envpol.2024.124622
- Comparison of satellite and ground-based measurements of erythemal dose from two tropical sites: Belo Horizonte (20° S, 44° W, 858 m) and Saint-Denis La Reunion (21° S, 55° E, 85 m) A. Silva 10.1007/s00704-024-05030-5
- Optical and particulate properties of dust aerosols in El Paso, Texas G. Ortiz et al. 10.1016/j.atmosres.2025.108127
- Identifying the Causes of Air Pollution in the Tehran Metropolis-Iran and Policy Recommendations for Sustainability A. Ghahremanlou & D. Ghahremanlou 10.1007/s41810-025-00303-6
- Dust Content Modulation and Spring Heat Waves in Senegal (2003–2022) S. Diouf et al. 10.3390/atmos15121413
- Improving AOD Algorithm Evaluation: A Spatial Matching Method for Minimizing Quality Control Bias B. Du et al. 10.3390/rs17071235
- Assessments for the Effect of Mineral Dust on the Spring Heat Waves in the Sahel P. Niane et al. 10.3390/atmos14091373
- 20 years of columnar aerosol properties at Valencia area (Eastern Spain) by ground-based sun-photometry M. Garcia-Suñer et al. 10.1016/j.atmosres.2023.107198
- Photovoltaics Energy Potential in the Largest Greek Cities: Atmospheric and Urban Fabric Effects, Climatic Trends Influences and Socio-Economic Benefits S. Vigkos & P. Kosmopoulos 10.3390/en17153821
- Influence of changes in anthropogenic and natural sources on global aerosol optical depth during COVID-19 lockdown: Ground-based observations, satellites, models S. Ramachandran & K. Ansari 10.1016/j.atmosenv.2024.120948
Discussed (final revised paper)
Latest update: 15 Apr 2025
Short summary
Megacities' air quality is determined by atmospheric aerosols. We focus on changes over the last two decades in the 81 largest cities, using satellite data. European and American cities have lower aerosol compared to African and Asian cities. For European, North American and East Asian cities, aerosols are decreasing over time, especially in China and the US. In the remaining cities, aerosol loads are increasing, particularly in India.
Megacities' air quality is determined by atmospheric aerosols. We focus on changes over the last...
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