Surface, satellite ozone variations in Northern South America during low anthropogenic emission conditions: a machine learning approach
Abstract2020 presented the ideal conditions for studying the air quality response to several emission reductions due to the COVID-19 lockdowns. Numerous studies found that the tropospheric ozone increased even in lockdown conditions, but its reasons are not entirely understood. This research aims to better understand the ozone variations in Northern South America. Satellite and reanalysis data were used to analyze regional ozone variations. An analysis of two of the most polluted Colombian cities was performed by quantifying the changes of ozone and its precursors and by doing a machine learning decomposition to disentangl...
Source: Air Quality, Atmosphere and Health - January 13, 2023 Category: Environmental Health Source Type: research
Reliability and stability of a statistical model to predict ground-based PM2.5 over 10 years in Karachi, Pakistan, using satellite observations
AbstractUnderstanding the complex mechanisms of climate change and its environmental consequences requires the collection and subsequent analysis of geospatial data from observations and numerical modeling. Multivariable linear regression and mixed-effects models were used to estimate daily surface fine particulate matter (PM2.5) levels in the megacity of Pakistan. The main parameters for the multivariable linear regression model were the 10-km-resolution satellite aerosol optical depth (AOD) and daily averaged meteorological parameters from ground monitoring (temperature, dew point, relative humidity, wind speed, wind dir...
Source: Air Quality, Atmosphere and Health - January 3, 2023 Category: Environmental Health Source Type: research
New processing methodology to incorporate marine halocarbons and dimethyl sulfide (DMS) emissions from the CAMS-GLOB-OCE dataset in air quality modeling studies
AbstractOceans are the largest source of biogenic emissions to the atmosphere, including aerosol precursors like marine halocarbons and dimethyl sulfide (DMS). During the last decade, the CAMS-GLOB-OCE dataset has developed an analysis of daily emissions of tribromomethane (CHBr3), dibromomethane (CH2Br2), iodomethane (CH3I), and DMS, due to its increasingly recognized role on tropospheric chemistry and climate dynamics. The potential impacts of these compounds on air quality modeling remain, however, largely unexplored. The lack of a reliable and easy methodology to incorporate these marine emissions into air quality mode...
Source: Air Quality, Atmosphere and Health - December 30, 2022 Category: Environmental Health Source Type: research
Emission characteristics and ozone formation potential assessment of volatile organic compounds in water-based paint auto parts electrophoresis enterprises
AbstractBeijing ’s industrial structure is changing rapidly, and many small and dispersed businesses are becoming major contributors of VOC emissions. There are about 740 auto parts enterprises in Beijing, and is typical of a small industry in which VOC emissions cannot be ignored. Two typical water-based paint a uto parts electrophoresis enterprises in Beijing were selected in this study. The results show that the annual average VOC emissions of both enterprises were 3.72 t, while the unorganized emissions accounted for 36.2%. The analysis of VOC emissions characteristics in the exhausts revealed that oxyg enated VOCs ...
Source: Air Quality, Atmosphere and Health - December 27, 2022 Category: Environmental Health Source Type: research
Impact of Hurricane Maria on mold levels in the homes of Pi ñones, Puerto Rico
AbstractHurricane Maria struck Puerto Rico on September 20, 2017, severely impacting the island. In order to quantify the impact of the hurricane on the indoor air quality, we evaluated the fungal levels in households (n = 20) of the Piñones community for the period of 2018 and 2019. For each dust sample collected, the 36 Environmental Relative Moldiness Index (ERMI) molds were quantified using qPCR assays, and then Shannon Diversity Index (SDI) values for the fungal populations were calculated. Homes were in five separate regions, regarding their proximity in the studied area. We found that for regions with reported ...
Source: Air Quality, Atmosphere and Health - December 26, 2022 Category: Environmental Health Source Type: research
Active biomonitoring of potentially toxic elements in urban air by two distinct moss species and two analytical techniques: a pan-Southeastern European study
AbstractThis is the first study to use moss transplants as a biomonitoring technique and inductively plasma mass spectrometry to investigate airborne potentially toxic element pollution and air quality in urban areas on a regional scale across nine Southeastern European countries. The mosses in bags were exposed for 2 months during the winter season (2019/2020) at five sites in each of the selected urban areas next to air quality (AQ) monitoring stations. The sites were selected concerning different land use classes (typical urban, residential, urban background, and rural sites). The concentrations of 35 elemen ts were d...
Source: Air Quality, Atmosphere and Health - December 26, 2022 Category: Environmental Health Source Type: research
Correction to: Chemical characterization, source apportionment, and human health risk assessment of PM2.5 in an urban area in Hanoi, Vietnam
(Source: Air Quality, Atmosphere and Health)
Source: Air Quality, Atmosphere and Health - December 26, 2022 Category: Environmental Health Source Type: research
A study on the chemical profile and the derived health effects of heavy-duty machinery aerosol with a focus on the impact of alternative fuels
AbstractThe combustion of petroleum-based fossil fuels is associated with a high environmental burden. Several alternative fuels, including synthetic fuels (e.g., gas-to-liquid, GTL) and biofuels (e.g., rapeseed methyl ester, RME) have been studied in the last few years. While the advantages for the environment (sustainability of biofuels) are well known, research on the resulting health effects from combustion aerosols of these alternative fuels is still scarce. Consequently, we investigated the chemical combustion profile from three distinct fuel types, including a petroleum-based fossil fuel (B0) and two alternative fue...
Source: Air Quality, Atmosphere and Health - December 21, 2022 Category: Environmental Health Source Type: research
Characteristics of non-methane hydrocarbons emitted from Chinese kitchens and their effect on ozone formation potential
In this study, measurements were conducted in a laboratory kitchen to investigate the species, emission factors, and factors of NMHCs generated during various cooking processes and to assess the corresponding ozone formation potential (OFP). The results showed that NMHC emission factors were about 997.98 –2015.92 µg g−1 h−1 (per unit mass of oil) for heating different edible oils, 27,483.52 –61,561.26 µg g−1 h−1 (per unit mass of seasoning) for heating oil with added seasonings, and 92,71.48 –24,671.08 µg g−1 h−1 (per unit mass of food material) for cooking dishes. In addition, the species wit...
Source: Air Quality, Atmosphere and Health - December 15, 2022 Category: Environmental Health Source Type: research
Spatial distribution and temporal variation of biomass burning and surface black carbon concentrations during summer (2015 ‒2021) in India
AbstractHistorical biomass burning in summer season (April ‒June, during 2015‒2021) was assessed by studying active fire spot data recorded by the Visible Infrared Imaging Radiometer Suite (VIIRS) aboard NASA/NOAA Suomi NPP satellite and mapping the same over Indian landmass. The fire spots often formed regional clusters and most profusely covered the states of Odisha, Chhattisgarh, Andhra Pradesh, Telengana, Madhya Pradesh, Maharashtra, Jharkhand, Karnataka, Punjab, Uttar Pradesh, Haryana, Gujarat, Tamil Nadu, Manipur, Nagaland, and Mizoram during April but their number decreased conspicuously in May and further in J...
Source: Air Quality, Atmosphere and Health - December 7, 2022 Category: Environmental Health Source Type: research
Impact of the COVID-19 pandemic on air pollution from jet engines at airports in central eastern China
This study provides practical guidance on continuous monitoring of the AEEs from LTO cycles and studying the impact of COVID-19 on the airport environment for other regions or countries. (Source: Air Quality, Atmosphere and Health)
Source: Air Quality, Atmosphere and Health - December 5, 2022 Category: Environmental Health Source Type: research
Construction of an atmospheric PAH emission inventory and health risk assessment in Jiangsu, China
AbstractThe emissions and their associated health risks of 16 priority-controlled PAHs in Jiangsu Province, a province with the highest level of comprehensive development in China, were studied. The total 16 PAHs emissions in Jiangsu Province in 2019 were 5022.14 tons, of which 1013.84 tons were carcinogenic PAHs, accounting for 20.19% of the total emissions. The per capita emissions in Jiangsu Province were similar to the national average, but the emission density was much greater than the average intensity of China. The primary sources of PAHs were domestic coal and petrol combustion, which accounted for 53.34% and 21.03...
Source: Air Quality, Atmosphere and Health - December 3, 2022 Category: Environmental Health Source Type: research
A bibliometric and scientometric: analysis towards global pattern and trends related to aerosol and precipitation studies from 2002 to 2022
AbstractThe recent heavy downpours in specific regions have initiated several studies on the relationship between aerosol and precipitation. The increase in pollution/population and the recent outbreak of diseases and environmental deterioration have been preceded by an increase in aerosol concentration, which would be directly related to precipitation. Considering this background, several studies are being conducted to define a clear relationship between aerosol concentration and precipitation. With the current need to understand aerosol and its characteristics to reduce pollution, research in this domain has significantl...
Source: Air Quality, Atmosphere and Health - November 30, 2022 Category: Environmental Health Source Type: research
What was done under the Argentine Sun: an econometric study of environmental quality along with economic growth and financial development
This study investigates the relationships among carbon emissions, energy consumption, economic growth, financial development, trade openness, and capital in Argentina from 1971 to 2018. In addition to two conventional tests, Zivot-Andrews and Perron-Vogelsang ones have also been used to detect the order of stationarity for the observed variables. There is strong evidence that indicates the presence of a long-term relationship among the variables, when ARDL testing approach with breaks is used. Bayer-Hanck cointegration test confirms our empirical results. The results show a negative and statistically significant impact of ...
Source: Air Quality, Atmosphere and Health - November 29, 2022 Category: Environmental Health Source Type: research
Airborne transmission of biological agents within the indoor built environment: a multidisciplinary review
AbstractThe nature and airborne dispersion of the underestimated biological agents, monitoring, analysis and transmission among the human occupants into building environment is a major challenge of today. Those agents play a crucial role in ensuring comfortable, healthy and risk-free conditions into indoor working and leaving spaces. It is known that ventilation systems influence strongly the transmission of indoor air pollutants, with scarce information although to have been reported for biological agents until 2019. The biological agents ’ source release and the trajectory of airborne transmission are both important in...
Source: Air Quality, Atmosphere and Health - November 28, 2022 Category: Environmental Health Source Type: research
