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Long-term seasonal characteristics of aerosol optical properties and radiative forcing at Beijing (during March 2001–March 2015) were investigated using a combination of ground-based Sun/sky radiometer retrievals from the AERONET and a radiative transfer model. Aerosol optical depth (AOD) showed a distinct seasonal variation with higher values in spring and summer, and relatively lower values in fall...
The transportation sector is one of the largest sources of energy consumption and CO2 emissions. The most important and difficult step in estimating transportation CO2 emissions is to accurately estimate vehicle CO2 emission factors (EFs). Most of the conventional methods draw less attention to driving behaviours. Based on a questionnaire survey, this study built a three-layer modified progressive...
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