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Distribution, source and transport of the aerosols over Central Asia
Abstract Limited by scarce observations, the sources and transport of aerosols over Central Asia are relatively unclear. In this study, using Terra and Aqua satellite images, Moderate Resolution Imaging Spectroradiometer (MODIS) data, Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite observations and meteorological reanalyze data, the distribution, source and transport of aerosols over Central Asia are investigated. We find that there are 227 aerosol events occurred in Central Asia during 2000–2017 and the aerosols which can be transported from outside to Central Asia are dominated by dust and smoke (organic carbon and black carbon) particles. Statistical analyses show that the contribution of the sources outside of Central Asia (76 times) to all aerosol events (122 times) is greater than that of local emissions in Central Asia (46 times) in the spring and summer during 2000–2017. The smoke events (39 times), sourcing from Russia and Europe with strong northwest wind, account for 51.3% of total aerosol events contributed by sources outside of Central Asia. Additionally, the dust events (37 times), which mainly source from the northern Arabia Peninsula and North Africa with strong southwest wind, account for 48.7% of the total aerosol events contributed by the sources outside of Central Asia. On the contrary, the contribution of local emissions in Central Asia (90 times) to all aerosol events (105 times) is greater than that of outside sources (15 times) in the autumn and winter. Result of clustering analyses for all 157 aerosol events during 2005–2017 is in agreement with the conclusion of statistical analyses based on observations. This study can provide some evidence to understand the aerosol properties over the Central Asia.
Highlights Firstly, the aerosol sources transported to Central Asia are analyzed. The study area includes Central Asia, Russia, Arabia Peninsula, Europe and North Africa. Combining MODIS and CALIPSO observations, trajectory mode and meteorological reanalyze data, we investigate the frequency, source and transport of the dominant aerosol types over Central Asia in detail. The meteorological conditions for controlling aerosols transport to Central Asia are also analyzed.
Distribution, source and transport of the aerosols over Central Asia
Abstract Limited by scarce observations, the sources and transport of aerosols over Central Asia are relatively unclear. In this study, using Terra and Aqua satellite images, Moderate Resolution Imaging Spectroradiometer (MODIS) data, Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite observations and meteorological reanalyze data, the distribution, source and transport of aerosols over Central Asia are investigated. We find that there are 227 aerosol events occurred in Central Asia during 2000–2017 and the aerosols which can be transported from outside to Central Asia are dominated by dust and smoke (organic carbon and black carbon) particles. Statistical analyses show that the contribution of the sources outside of Central Asia (76 times) to all aerosol events (122 times) is greater than that of local emissions in Central Asia (46 times) in the spring and summer during 2000–2017. The smoke events (39 times), sourcing from Russia and Europe with strong northwest wind, account for 51.3% of total aerosol events contributed by sources outside of Central Asia. Additionally, the dust events (37 times), which mainly source from the northern Arabia Peninsula and North Africa with strong southwest wind, account for 48.7% of the total aerosol events contributed by the sources outside of Central Asia. On the contrary, the contribution of local emissions in Central Asia (90 times) to all aerosol events (105 times) is greater than that of outside sources (15 times) in the autumn and winter. Result of clustering analyses for all 157 aerosol events during 2005–2017 is in agreement with the conclusion of statistical analyses based on observations. This study can provide some evidence to understand the aerosol properties over the Central Asia.
Highlights Firstly, the aerosol sources transported to Central Asia are analyzed. The study area includes Central Asia, Russia, Arabia Peninsula, Europe and North Africa. Combining MODIS and CALIPSO observations, trajectory mode and meteorological reanalyze data, we investigate the frequency, source and transport of the dominant aerosol types over Central Asia in detail. The meteorological conditions for controlling aerosols transport to Central Asia are also analyzed.
Distribution, source and transport of the aerosols over Central Asia
Atmospheric Environment ; 210 ; 120-131
2019-04-24
12 pages
Article (Journal)
Electronic Resource
English
Dust , Smoke , Source , Transport , Central Asia
Intercontinental transport of aerosols and photochemical oxidants from Asia and its consequences
| Online Contents | 2007