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Aerosol optical properties and radiative forcing critically influence Earth’s climate, particularly in semi-arid regions. This study investigates these properties in Yinchuan, Northwest China, focusing on aerosol optical depth (AOD), single-scattering albedo (SSA), Ångström Index, and direct radiative forcing (DRF) using 2023 CE-318 sun photometer data, HYSPLIT trajectory analysis, and the SBDART model. Spring AOD peaks at 0.58 ± 0.15 (500 nm) due to desert dust, with coarse-mode particles dominating, while summer SSA reaches 0.94, driven by fine-mode aerosols. Internal mixing of dust and anthropogenic aerosols significantly alters DRF through enhanced absorption, with spring surface DRF at −101 ± 22W m−2 indicating strong cooling and internal mixing increasing atmospheric DRF to 52.25W m−2. These findings elucidate dust–anthropogenic interactions’ impact on optical properties and radiative forcing, offering critical observations for semi-arid climate research.
Details
Dust;
Aerosols;
Altitude;
Semiarid climates;
Human influences;
Stratification;
Radiation;
Climate change;
Radiative forcing;
Deserts;
Precipitation;
Cooling;
Optical properties;
Semiarid zones;
Carbon;
Regions;
Spring;
Arid regions;
Photometers;
Albedo;
Pollutants;
Arid climates;
Arid zones;
Anthropogenic factors;
Emissions;
Data processing;
Atmospheric aerosols;
Outdoor air quality;
Sun;
Spring (season);
Climate;
Atmosphere;
Aerosol optical properties;
Optical analysis;
Atmospheric particulates;
Aerosol optical depth;
Vertical distribution;
Trajectory analysis;
Semi arid areas;
Coal
; Hu, Zhao 2 ; Rao, Zhimin 2 1 College of Mechatronic Engineering, North Minzu University, Yinchuan 750021, China
2 College of Electrical and Information Engineering, North Minzu University, Yinchuan 750021, China, Key Laboratory of Atmospheric Environmental Remote Sensing of Ningxia, Yinchuan 750021, China
3 Key Laboratory of Atmospheric Environmental Remote Sensing of Ningxia, Yinchuan 750021, China