Visibility Degradation during Foggy Period due to Anthropogenic Urban Aerosol at Delhi, India
نویسنده
چکیده
Fog frequencies dominate in urban area than rural area. Increased air pollution in urban area may lead to the atmospheric reactions, resulting into the formation of secondary pollutants similar to cloud condensation processes. Northern regions of India experience severe fog conditions during the winter period (November-January) each year. In this study, simultaneous measurements of particulate mass concentration (0.23μm to 20μm), meteorological parameters and atmospheric visibility in Delhi city, India during 2007-2008 have been studied in order to understand their role in fog formation. The effects of aerosols on fog formation are discussed through an analysis of trends in fog frequency and comparison with meteorological parameters, and visibility as an indicator of aerosol load. The existing dataset of fog frequency, meteorological parameters and visibility is used to find linear regression model, that explained the variation in visibility due to depression in temperature and aerosols load.
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