Abstract
During a long-range transport, Sahara dust is naturally mixed with other aerosols, including maritime. At present, the mixing of these types of marine and dust aerosols is of particular interest, since it is important to correctly estimate the ionic and mass balance of aerosol particles. This problem is caused by the need for a reliable determination of the aerosol source and for correct atmospheric correction of satellite data. An analysis was made of the correlation between the change in the AOT parameter and the dates of dust transport from the Sahara to the Black Sea region. The analysis results confirmed the fact that the presence of dust aerosol over the Black Sea water area has a strong effect on the AOT indicator at all wavelengths, increasing the parameter almost by 2 times. This fact is correspondent to the generation of a secondary type of aerosol, namely, dusty marine aerosol. Analysis of CALIPSO aerosol subtype maps also revealed the presence of dusty marine aerosol with corresponding depolarization coefficients.
Highlights
Regular observations of optical and microstructural aerosol characteristics with a high spatial-temporal resolution are necessary for high-quality monitoring of the ecological state of the atmosphere, study of climate formation processes, improvement of forecast accuracy, and solution of many other geophysical problems [1].A high dust load from the Sahara Desert is recorded annually over the Black Sea region
The aerosol optical thickness (AOT) parameter was used as the main optical characteristic of the state of the atmosphere, as it indicates the aerosol turbidity of the atmosphere and the ecological state of the air basin
A long-term array of data on aerosol optical thickness over the Black Sea region was collected as a part of scientific expeditions in the Black Sea
Summary
Regular observations of optical and microstructural aerosol characteristics with a high spatial-temporal resolution are necessary for high-quality monitoring of the ecological state of the atmosphere, study of climate formation processes, improvement of forecast accuracy, and solution of many other geophysical problems [1].A high dust load from the Sahara Desert is recorded annually over the Black Sea region. These interactions are regulated by the spacetime distribution, and by its microphysical, optical, and chemical properties [2]. This task is caused by the need for a reliable determination of the aerosol source and for correct atmospheric correction of satellite data. Previous studies using the CALIPSO atmospheric aerosol typing algorithms [4] have shown a high content of dusty marine aerosol over the Crimean coast
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