The acidity of atmospheric particles and clouds

HOT Pye, A Nenes, B Alexander, AP Ault… - Atmospheric …, 2020 - acp.copernicus.org
Acidity, defined as pH, is a central component of aqueous chemistry. In the atmosphere, the
acidity of condensed phases (aerosol particles, cloud water, and fog droplets) governs the …

The global impacts of COVID-19 lockdowns on urban air pollution: A critical review and recommendations

GI Gkatzelis, JB Gilman, SS Brown, H Eskes… - Elem Sci …, 2021 - online.ucpress.edu
The coronavirus-19 (COVID-19) pandemic led to government interventions to limit the
spread of the disease which are unprecedented in recent history; for example, stay at home …

Enhanced secondary pollution offset reduction of primary emissions during COVID-19 lockdown in China

X Huang, A Ding, J Gao, B Zheng, D Zhou… - National Science …, 2021 - academic.oup.com
To control the spread of the 2019 novel coronavirus (COVID-19), China imposed nationwide
restrictions on the movement of its population (lockdown) after the Chinese New Year of …

Multiphase oxidation of sulfur dioxide in aerosol particles: Implications for sulfate formation in polluted environments

T Liu, AWH Chan, JPD Abbatt - Environmental Science & …, 2021 - ACS Publications
Atmospheric oxidation of sulfur dioxide (SO2) forms sulfate-containing aerosol particles that
impact air quality, climate, and human and ecosystem health. It is well-known that in-cloud …

Persistent heavy winter nitrate pollution driven by increased photochemical oxidants in northern China

X Fu, T Wang, J Gao, P Wang, Y Liu… - Environmental …, 2020 - ACS Publications
Nitrate is an increasingly important component of fine particulate matter (PM2. 5) during
winter in northern China. Past emission control has been ineffective in reducing winter …

A chemical cocktail during the COVID-19 outbreak in Beijing, China: Insights from six-year aerosol particle composition measurements during the Chinese New Year …

Y Sun, L Lei, W Zhou, C Chen, Y He, J Sun, Z Li… - Science of the Total …, 2020 - Elsevier
The rapidly spread coronavirus disease (COVID-19) has limited people's outdoor activities
and hence caused substantial reductions in anthropogenic emissions around the world …

Mitigation potential of global ammonia emissions and related health impacts in the trade network

R Ma, K Li, Y Guo, B Zhang, X Zhao, S Linder… - Nature …, 2021 - nature.com
Abstract Ammonia (NH3) emissions, mainly from agricultural sources, generate substantial
health damage due to the adverse effects on air quality. NH3 emission reduction strategies …

[HTML][HTML] Effect of changing lifetime on the seasonality and long-term trends of satellite-observed tropospheric columns over China

V Shah, DJ Jacob, K Li, RF Silvern… - Atmospheric …, 2020 - acp.copernicus.org
Satellite observations of tropospheric NO 2 columns are extensively used to infer trends in
anthropogenic emissions of nitrogen oxides (NO x≡ NO+ NO 2), but this may be …

Rapid transition in winter aerosol composition in Beijing from 2014 to 2017: response to clean air actions

H Li, J Cheng, Q Zhang, B Zheng… - Atmospheric …, 2019 - acp.copernicus.org
The clean air actions implemented by the Chinese government in 2013 have led to
significantly improved air quality in Beijing. In this work, we combined the in situ …

Contribution of Wildland-Fire Smoke to US PM2.5 and Its Influence on Recent Trends

K O'Dell, B Ford, EV Fischer… - Environmental science & …, 2019 - ACS Publications
Seasonal-mean concentrations of particulate matter with diameters smaller than 2.5 μm
(PM2. 5) have been decreasing across the United States (US) for several decades, with …