Aerosol characterization and radiative properties over Kavaratti, a remote island in southern Arabian Sea from the period of observations

The Impact of Intense Winter Saharan Dust Events on PM and Optical Properties at Urban Sites in the Southeast of the Iberian Peninsula

“…Values close to or above 0.900 (λ = 520 nm) have been previously obtained in the Iberian Peninsula during Saharan events [17,[39][40][41]. The spectral variation of SSA can provide useful information about the dominance of specific aerosol types (e.g., BC, organic carbon, dust, sulfates) during events [42,43]. Generally, SSA increases with wavelength for dust aerosols and decreases for biomass-burning and urban/industrial aerosols, while it exhibits almost neutral spectral dependence in the case of the aerosol mixture and sulfate particles [44][45][46].…”

“…A better characterization of the absorption during these events can be carried out by analyzing the relationship between AAE and EAE (Extinction Angström Exponent). The use of the matrix representing the division of AAE vs. EAE space is widely used [43,46]. This approach provides a good discrimination among light-absorbing PM components (mostly MD, mixed MD and BC, and mostly BC) since each of these species have specific and well-known values of AAE and EAE.…”

“…This approach provides a good discrimination among light-absorbing PM components (mostly MD, mixed MD and BC, and mostly BC) since each of these species have specific and well-known values of AAE and EAE. In this work, the absorbing aerosols have been distinguished based on the following classification [43]: mostly MD (AAE > 1.8, EAE < 0.8), mostly BC (0.8 < AAE < 1.4, EAE > 1), and mixed MD and BC (AAE ~1.5, EAE ~0.9). Table 5 shows the mean values obtained for AAE 450-635 and EAE 450-635 during the three events and for no SDE conditions.…”

Atmospheric Processing at the Sea‐Land Interface Over the South China Sea: Secondary Aerosol Formation, Aerosol Acidity, and Role of Sea Salts

“…For example, the International Global Atmospheric Chemistry Project (IGAC) have paid special attention to the effects of terrestrial anthropogenic pollutant emissions and transport pathways on aerosol concentration and compositions in downwind regions, for example, East Asia coastal regions and the Pacific Rim of North America (Bates et al., 1998; Jaffe et al., 1999; Kim et al., 2007; Melamed et al., 2015). The Indian Ocean Experiment (INDOEX) was carried out in 1999 to study the effects of anthropogenic pollutants from Southern Asia on the regional aerosol mass concentration and spatial distribution, chemical compositions and optical properties (e.g., aerosol optical depth and single scattering albedo) (Alfaro et al., 2003; Chazette, 2003; Collins et al., 2002; Guazzotti et al., 2001; Lawrence & Lelieveld, 2010; Mayol‐Bracero, 2002; Patel et al., 2017; Ramanathan et al., 2007). Recently, complex air pollution in the coastal regions had aroused more and more attentions and interests to explore the mechanism of secondary aerosol formation at the sea‐land interface (Guo et al., 2017; Ibikunle et al., 2020; Liu et al., 2019).…”

Μελέτη Της Επίδρασης Των Αιωρούμενων Σωματιδίων Και Των Νεφών Στην Ηλιακή Ακτινοβολία

“…Επιπρόσθετα, η συμμετοχή του PW στην μορφοποίηση των νεφών και στην τροποποίηση του μεγέθους των αιωρημάτων και των οπτικών ιδιοτήτων τους εξηγούσε τις έμμεσες επιδράσεις του και τον κρίσιμο ρόλο της ατμοσφαιρικής οπτικής διαπερατότητας του. Κατά συνέπεια, το PW ρύθμιζε την επίδραση των αιωρημάτων στην ακτινοβολία, και γι' αυτό τον λόγο ήταν σημαντικό να εξετάζεται το σύνολο των ατμοσφαιρικών επιδράσεων του στην ακτινοβολία(Kay και Box, 2000; Huttunen et all., 2014;Patel et al, 2017).…”