Wintertime characteristics of aerosols at middle Indo-Gangetic Plain: Impacts of regional meteorology and long range transport

摘要: Abstract To develop a coherent picture of possible origin Asian aerosol, transport and meteorological interaction; wintertime aerosol (January, 1 to March, 31, 2014 (n = 90)) were measured in middle IGP terms mass loading, optical properties, altitudinal distributions both high low altitude transportation. Both space-borne passive (Aqua Terra MODIS) active sensor (CALIPSO-CALIOP) based measurements concurrently used over the selected transect (25°10′–25°19′N 82°54′–83°4′E). Exceptionally loading was recorded for PM10 (233 ± 58.37 μg m−3) PM2.5 (138 ± 47.12 μg m−3). Daily variations PM2.5/PM10 persist range 0.25–0.97 (mean = 0.60 ± 0.14; n = 90) accordance computed Angstrom exponent (0.078–1.407; mean: 1.002 ± 0.254) explaining concurrent contribution region. Space borne MODIS-AOD: 0.259–2.194) ground (MTP-AOD: 0.066–1.239) AODs revealed significant temporal variability moderate association (MODIS-AOD: 0.46; MTP-AOD: 0.56) 0.54; 0.39). Varying AOD also explained variables. CALIPSO altitude-orbit-cross-section profiles presence non-spherical coarse particulates (altitude: 1.2–5.4 km) dominance spherical fine 0.1–4.2 km). Contribution trans-boundary aerosols transportation loadings at recognized through lagrangian particle dispersion model, synoptic vector wind different geopotential heights satellite images.