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Effect of PM10/PM2.5 on fog in recent years over Indira Gandhi international, airport new Delhi

Aditi Singh* a

Mahes Kumar a

a. Atmospheric Science Department, Ministry of Earth Sciences, New Delhi, India
* Author to whom correspondence should be addressed
2023.2(1); https://doi.org/10.58396/gges020104
Received: 01 Jun 2023 / Accepted:07 Jul 2023 / Published: 18 Jul 2023

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2023-12-21

Abstract

Fog plays a significant role in many environmental and ecological processes. The aerosol particles present in the atmosphere becomes fog droplets due to condensation of water vapor on them in high humidity conditions. The formation and intensity of fog over an urban area depends on various factors that may promote or mitigate the process. The combustion processes are responsible for the presence of air pollutants in the atmosphere. The urban heat island effect may raise the temperature, lower the humidity and can even change the wind pattern of any region. The urban areas have often reported increase in frequency of fog due to emissions of air pollutants. The objective of the present study is to analyze the effect of air pollutants in formation fog over Delhi. The concentrations of air pollutants and meteorological observations are utilized for a period of six years in the present work. The study focuses on examining the dominant factors involved in formation of fog. It is found although high values of air pollutants aid in formation of dense fog but relative humidity is the most important factor that influence the formation of fog.

Keywords:

Fog, air pollution, urban, temperature, humidity.

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