All Outputs (6)

Factors Influencing the Formation of Nitrous Acid from Photolysis of Particulate Nitrate (2023)
Journal Article
Sommariva, R., Alam, M. S., Crilley, L. R., Rooney, D. J., Bloss, W. J., Fomba, K. W., …Carpenter, L. J. (2023). Factors Influencing the Formation of Nitrous Acid from Photolysis of Particulate Nitrate. Journal of Physical Chemistry A, 127(44), 9302–9310. https://doi.org/10.1021/acs.jpca.3c03853

Enhanced photolysis of particulate nitrate (pNO3) to form photolabile species, such as gas-phase nitrous acid (HONO), has been proposed as a potential mechanism to recycle nitrogen oxides (NOx) in the remote boundary layer (“renoxification”). This ar... Read More about Factors Influencing the Formation of Nitrous Acid from Photolysis of Particulate Nitrate.

Extreme Concentrations of Nitric Oxide Control Daytime Oxidation and Quench Nocturnal Oxidation Chemistry in Delhi during Highly Polluted Episodes (2023)
Journal Article
Nelson, B. S., Bryant, D. J., Alam, M. S., Sommariva, R., Bloss, W. J., Newland, M. J., …Hamilton, J. F. (2023). Extreme Concentrations of Nitric Oxide Control Daytime Oxidation and Quench Nocturnal Oxidation Chemistry in Delhi during Highly Polluted Episodes. Environmental Science and Technology Letters, 10(6), 520-527. https://doi.org/10.1021/acs.estlett.3c00171

Delhi, India, suffers from periods of very poor air quality, but little is known about the chemical production of secondary pollutants in this highly polluted environment. During the postmonsoon period in 2018, extremely high nighttime concentrations... Read More about Extreme Concentrations of Nitric Oxide Control Daytime Oxidation and Quench Nocturnal Oxidation Chemistry in Delhi during Highly Polluted Episodes.

Measurement report: Interpretation of wide-range particulate matter size distributions in Delhi (2022)
Journal Article
Şahin, Ü. A., Harrison, R. M., Alam, M. S., Beddows, D. C., Bousiotis, D., Shi, Z., …Verma, R. (2022). Measurement report: Interpretation of wide-range particulate matter size distributions in Delhi. Atmospheric Chemistry and Physics, 22(8), 5415-5433. https://doi.org/10.5194/acp-22-5415-2022

Delhi is one of the world's most polluted cities, with very high concentrations of airborne particulate matter. However, little is known about the factors controlling the characteristics of wide-range particle number size distributions. Here, new mea... Read More about Measurement report: Interpretation of wide-range particulate matter size distributions in Delhi.

Chemical characteristics and source apportionment of particulate matter (PM2.5) in Dammam, Saudi Arabia: Impact of dust storms (2022)
Journal Article
Alwadei, M., Srivastava, D., Alam, M. S., Shi, Z., & Bloss, W. J. (2022). Chemical characteristics and source apportionment of particulate matter (PM2.5) in Dammam, Saudi Arabia: Impact of dust storms. Atmospheric Environment: X, 14, Article 100164. https://doi.org/10.1016/j.aeaoa.2022.100164

Atmospheric particulate matter (PM) is known to be harmful to human and environmental health, with factors including particle size and composition thought to be key drivers of toxicity. Understanding the composition and hence sources of PM is critica... Read More about Chemical characteristics and source apportionment of particulate matter (PM2.5) in Dammam, Saudi Arabia: Impact of dust storms.

PM1 composition and source apportionment at two sites in Delhi, India, across multiple seasons (2021)
Journal Article
Reyes-Villegas, E., Panda, U., Darbyshire, E., Cash, J. M., Joshi, R., Langford, B., …Allan, J. D. (2021). PM1 composition and source apportionment at two sites in Delhi, India, across multiple seasons. Atmospheric Chemistry and Physics, 21(15), 11655–11667. https://doi.org/10.5194/acp-21-11655-2021

Air pollution in urban environments has been shown to have a negative impact on air quality and human health, particularly in megacities. Over recent decades, Delhi, India, has suffered high atmospheric pollution, with significant particulate matter... Read More about PM1 composition and source apportionment at two sites in Delhi, India, across multiple seasons.

Chemical source profiles of fine particles for five different sources in Delhi (2021)
Journal Article
Hama, S., Kumar, P., Alam, M. S., Rooney, D. J., Bloss, W. J., Shi, Z., …Gupta, S. K. (2021). Chemical source profiles of fine particles for five different sources in Delhi. Chemosphere, 274, Article 129913. https://doi.org/10.1016/j.chemosphere.2021.129913

Increasing emissions from sources such as construction and burning of biomass from crop residues, roadside and municipal solid waste have led to a rapid increase in the atmospheric concentrations of fine particulate matter (≤2.5 μm; PM2.5) over many... Read More about Chemical source profiles of fine particles for five different sources in Delhi.