气溶胶
埃指数
环境科学
大气科学
优势(遗传学)
亚洲尘埃
生物质燃烧
微粒
气候学
气象学
地理
地质学
化学
生物化学
有机化学
基因
作者
Dipesh Rupakheti,Maheswar Rupakheti,Mukesh Rai,Xiangyao Yu,Xiufeng Yin,Shichang Kang,M. D. Orozaliev,Valery P Sinyakov,Sabur F. Abdullaev,Ishaq Dimeji Sulaymon,Jianlin Hu
标识
DOI:10.1016/j.envpol.2022.120501
摘要
Ground-based observational characterization of atmosphere aerosols over Central Asia is very limited. This study investigated the columnar aerosol characteristics over Issyk-Kul, Kyrgyzstan, a background site in Central Asia using the long-term (∼14 years: August 2007-November 2021) data acquired with the Cimel sunphotometer. The mean aerosol optical depth (AOD) and Ångström exponent (AE) during the observation period were 0.14 ± 0.10 and 1.19 ± 0.41, respectively. Both AOD and AE varied across seasons, with highest AOD in spring (0.17 ± 0.17). Regarding the aerosol types, clean continental aerosols were dominant type (65%), followed by mixed aerosols (∼19%), clean marine aerosols (∼14%), dust (0.8%), and urban/industrial and biomass burning aerosol (0.7%). The aerosol volume size distribution was bimodal indicating the influence of both anthropogenic and natural aerosols with clear dominance of coarse mode during the spring season. Mainly dust and mixed aerosols were present during high aerosol episodes while the coarse mode aerosol volume concentration was 7.5 (strong episodes) and ∼19 (extreme episodes) times higher than the whole period average. Aerosol over this background sites were from local and regional sources with some contribution of long-range transport.
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