The article considers the period of influence of the tropical storm Ophelia on the optical characteristics obtained for the Black Sea region. Over the Black Sea on 18.10.2017-19.10.2017 the transfer of air flows from the northwest was recorded, which contained particles like dust aerosol from the Sahara desert, and smoke particles from fires from the Iberian Peninsula. Analysis of the dust-smoke combined type aerosol influence on the results of satellite spectral brightness coefficient over the Black Sea water area according to MODIS and VIIRS measurements showed an underestimation of the values of Rrs(λ) in the short-wave region compared to in situ data obtained at the western Black Sea stations of the AERONET network.
In this work a precipitated water long-term data array is collected for the period since 2006 to 2019 over the Black Sea region. A comparative research of MODIS Terra / Aqua satellite data and ground AERONET network photometer measurements was carried out. The monthly average arrays were analyzed and the trends of PW parameter changes were revealed. Comparative analysis showed a deviation upwards of 0,40 cm from satellite measurements from AERONET measurements. This amount of discrepancy falls within the confidence interval of values and is the acceptable range of errors. PW data for AERONET stations have a high correlation with MODIS satellite data (95%).
The results of the analysis of the aerosol optical thickness, asymmetry factor and the aerosol reverse trajectories according to AERONET network data for the western part of the Black Sea region are described. The results of a comparison of the variability of the AOT values and the variability of the aerosol asymmetry factor at the Black Sea stations and the Mediterranean station Medenine-IRA for the average and dust transport days are presented.
The analysis of aerosol optical depth data over the western part of the Black Sea region is carried out. Data sources were remote sensing tools such as: CALIPSO satellite and MODIS radiometer. The results of comparing AOD according to CALIPSO and MODIS with the ground-based AOD values of SPM photometer (Sevastopol) and AERONET data (Gloria) in the period from 2016 to 2017 are presented.
The absorbing aerosol influence on the brightness spectral coefficient (Rrs (λ)) of the Black sea by insitu AERONET-OC and MODIS satellite data has been studied. It is shown that the registration of dust transfer at wavelengths of 412, 488, 531 and 547 shows the most significant (more than 3 times) difference between the values of Rrs (λ) insitu AERONETOC and Rrs (λ) MODIS.
Coefficient of vertical light attenuation at wavelength 490 nm (Kd (490)), obtained from measurements of the MODIS device from the Aqua satellite and the effect of an absorbing aerosol on a standard satellite product was studied. For this The event of absorbing aerosol transfer over the Black Sea northwestern shelf area which was diagnosed at the AERONET-OC Gloria station in the summer season of 2014 was considered. It was shown that the presence of an absorbing aerosol in the atmosphere leads to an overestimation of the standard satellite product: the diffuse light attenuation coefficient at 490 nm (Kd (490)) in comparison with its value calculated from the ascending radiation spectrum direct measurements at the above-mentioned AERONET- OC.
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