文章基本信息

标题：Aerosol Opto-physical Properties: Temporal Variation, Aerosol Type Discrimination and Source Identification
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作者：Amol R. Kolhe ; Gajanan Raghunath Aher ; Pawan S. Soyam 等
期刊名称：Aerosol and Air Quality Research
印刷版ISSN：1680-8584
出版年度：2022
卷号：22
期号：10
页码：1-18
DOI：10.4209/aaqr.220104
语种：English
出版社：Chinese Association for Aerosol Research in Taiwan
摘要：Atmospheric aerosol characterization experiments were conducted, for the first time, over AC-Ahmednagar, a semi-urban location in south-west India, using a multi-spectral solar radiometer from January 2016 to May 2018. The MODIS/Terra retrieved Level-2 daily swath AOD550 nm data sets during 2011–2021 were also used to infer long-term behaviour of columnar aerosols at AC-Ahmednagar. The daily-averaged, Microtops II Sun photometer measured AOD500 nm and AOD1020 nm and MODIS retrieved AOD550 nm reveal a discernible wide spectrum of variability in their magnitudes. Magnitude-wise, AODs at both the wavelengths depict an increasing trend of about 0.05 year–1 (AOD500 nm) and 0.03 year–1 (AOD1020 nm). However, MODIS AOD550 nm illustrates statistically insignificant increasing trend of about 0.007 year–1. Microtops II Sun photometer derived Angstrom exponent (AE) depicts a noticeable day-to-day variability with respect to its overall mean value (1.06 ± 0.30) indicating the presence of diverse-sized aerosols. The AOD500 nm against AE440-870 nm contour density map analysis qualitatively characterizes different aerosol types prevalent in the atmospheric column. The weighted PSCF (WPSCF) analysis for AOD performed on a seasonal basis reveals the presence of possible contribution of long-range transported plumes of varied aerosols on different scales and types from a variety of emission sources from different regions.
关键词：Aerosol optical depth;Ångström exponent;MODIS;Fine-mode aerosols;Coarse-mode aerosols;Coagulation