Determining hotspots of gaseous criteria air pollutants in Delhi airshed and its association with stubble burning.

ABSTRACT: Transboundary pollutant transport is considered as one of the primary factors causing the seasonal air quality deterioration in Delhi, India's capital. The highest standard deviations exceeding days in winter for NO₂ (7.14-9.63%) and SO₂ (4.04-7.42%) in 2019-2022 underscore the role of meteorological conditions in Delhi's pollution. In contrast, the post-monsoon season shows the highest pollutant exceedance days (4.52-8.00%) for CO due to stubble burning (SB) in Punjab (68,902 fires/year). Despite the government's assertions of decreasing SB events (14.68%), the city's CO exceedance days persistently rose by 6.36%. CAMS data is used for assessing contribution hotspots through back-trajectory analysis at multiple heights. An overlap hotspot of 111 sq. km area is identi

SUBMITTER: Nirwan N 

PROVIDER: S-EPMC10782015 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature