Black carbon in urban atmospheres: source apportionment, mixing states, and implications for climate and respiratory health

Earth Systems, Resources, and Sustainability

Forests: methane sinks or methane sources?

Forests are not a uniform methane (CH4) sink; soils, stems, and canopies act as sources or sinks depending on local conditions. We synthesize emerging evidence, expose the limitations of component-based approaches, and advocate integrated observational-modeling frameworks to accurately quantify net forest CH4 exchange...

Tree selection in urban greening shapes air quality for global cities

Mitigating ozone pollution remains a pressing challenge for megacities worldwide. Biogenic volatile organic compounds (VOCs) are proposed as pivotal precursors to urban ozone formation. However, direct observational evidence is scarce and the extent of this effect across cities is unclear. Here, by combining an unprece...

Analyzing the Effects of Carbon Escape, Source and Way Out in Kogi State

Carbon escape, or the release of carbon dioxide (CO₂) and other greenhouse gases (GHGs) into the atmosphere, contributes significantly to climate change, with localized impacts in regions like Kogi State, Nigeria. This review examines the sources of carbon emissions in Kogi State, their environmental and socio-economic...

Chemical characterization and source apportionment of carbonaceous aerosols during post-monsoon biomass burning and Diwali at an upwind site of Delhi

Severe post-monsoon haze in Delhi-NCR poses air-quality and health risks and reflects regional and urban emissions. Sonipat lies along the principal transport corridor linking the agricultural burning regions of Punjab and Haryana with Delhi and serves as an intermediate receptor for regional pollution. However, sour...

Estimating Speciated Input Concentrations for Biomass Burning Organic Aerosol Modeling

Biomass burning is a major emission source of volatile organic compounds (VOC) and of primary organic aerosols (POA). As chemical modeling approaches become more complex and include larger number of...