Aerosol pollution is a significant threat to public health, and ground-based lidar can effectively monitor air pollution and regional air quality, including providing accurate observations of the vertical distribution of aerosols. Two long-distance trans-boundary aerosol episodes (named P2 and P5; P2 was the heavy pollution period (from 19:00 on January 19 to 15:00 on January 20) and P5 was the moderate

The concentration of ions, metals, and metalloids in hailstone samples was evaluated for the first time in South America. The samples were previously cleaned with ultrapure water to eliminate potential contaminants. The ions concentrations in the samples showed a general pattern according to the following sequence: Ca2+ ˃ NO3-> K+ > CHOO− > Mg2+ > Cl− > SO42_> Na+ > NH4+ > F−. Regarding the metals

As global air pollution aggravates, it urges us to investigate the evolution of atmospheric related emissions. Recently oxidation flow reactor (OFR) has been widely used to simulate the aging of atmospheric related emissions as its excellent performance. In this work, we systematically characterized the SOA formation from α-pinene using a custom-built OFR under different conditions. The particle loss

Here, we discuss the influences of small-scale biomass burning (BB) originating from local/regional emissions, such as agricultural waste burning, which are difficult to detect via remote sensing. To evaluate the BB contribution, we used a positive matrix factorization (PMF) model with chemical component data including levoglucosan, a useful BB indicator, at multiple urban, suburban, and background

Ozone (O3) is a secondary atmospheric pollutant present in the tropospheric environment. Ozone enters in internal tissue of leaf through stomata and produces reactive oxygen species (ROS) which damages cellular membrane, alter gene expression and metabolic activities and ultimately caused death of the plant tissues. Certain defensive mechanism occurs in the internal part of leaves to eliminate generated

The Beijing area experienced daily ozone increases after the Belt and Road Forum in May 2017, with the maximum hourly O3 peak exceeding 400 μg/m3. The high O3 event was analyzed by using observed data and model simulations. Results indicated that the local photochemistry was the major driver boosting O3 formation for northern suburban sites and regional transport in the late afternoon made another

Kanpur is one of the most polluted industrial cities in the world, as tagged by the World Health Organization in 2018. Most studies on airborne particulate matter in the area have shown that the PM2.5 concentration in the city is much higher than that of other major cities around the country. In the present study, for analyzing the air quality (PM2.5) and elemental concentration (Zn, Ca, Fe, K, Mn

This study characterizes the hygroscopic and chemical nature of aerosols originating from ten locations (4 outdoors and 6 indoors) around the Gol-E-Gohar (GEG) iron ore mine (Iran), including an assessment of how hygroscopic growth alters particulate deposition in the respiratory system. Aerosols collected on filters in three diameter (Dp) ranges (total suspended particulates [TSP], Dp ≤ 10 μm [PM10]

The dynamic and thermodynamic characteristics of a dust precipitation event that took place on May 11, 2020 in North China are analyzed. With the invasion of cold air from Lake Baikal (107°E, 53°N), the arid area in the southeast of Mongolia (107°–108°E, 47°–48°N) was in a region with a large potential pseudo-equivalent temperature gradient, where interactions between cold and warm air led to instability

We present a high-resolution air quality study over São Paulo, Brazil with the EURopean Air Pollution Dispersion - Inverse Model (EURAD-IM) used for the first time over South America simulating detailed features of aerosols. Modeled data are evaluated with observational surface data and a Lidar. Two case studies in 2016 with distinct meteorological conditions and pollution plume features show transport

Land-use and land-cover changes due to urban expansion is recognized as one of the crucial factors affecting carbon dioxide emissions. In this study, the land conversion effects on soil CO2 fluxes associated with temperate re-established grasslands within the Forest Botanical Garden found on an anthropogenic landform were investigated. The present work analyses the capabilities and requirements of

This study is focused on the investigations of bushfire-originated smoke particle released during different prescribed burning events conducted between May 2018 and August 2019 in Toohey forest region, Queensland, Australia. Particle size/mass distribution along with corresponding elemental content had been comprehensively measured and the results were compared against outcomes obtained during the

Based on the observation data of VOCs in the Beijing atmosphere in the summer of 2016, this study analyzed the variation characteristics of the VOCs concentration and composition with time. The potential impacts of each component on ozone and secondary organic aerosol (SOA) production were compared. The results showed that the concentration of alkane was the highest in the total VOCs in Beijing, followed

The goal of this study was to identify the relative contribution of fossil and non-fossil contributions to PM2.5 carbonaceous aerosols (CAs) in PM2.5 pollution events. To achieve this, the pollution characteristics and source apportionments of CAs using radiocarbon (14C) and organic tracers (anhydrosugar) were determined during a long-lasting winter haze episode (Jan. 13–24, 2018) in Xiangyang, central

The absorption enhancement of black carbon (BC) was studied at the Jiangxinzhou site of the Nanjing Bureau of Meteorology (Nanjing, China), using the combination of a thermal denuder (TD) and a three-wavelength, photo acoustic soot spectrometer (PASS-3). With increase TD temperature, the amount of volatile components gradually decreased. While at > 250 °C, most organic substances and inorganic matter

Chronic atmospheric nitrogen (N) deposition could influence the functioning of ecosystems as well as their biodiversity. However, N deposition in urban forest ecosystems, especially natural evergreen broad-leaved forests, is not well known. In this study, the concentrations and fluxes of dissolved inorganic N (DIN) and dissolved organic N (DON) in bulk deposition, throughfall, and stemflow were assessed

Access to detailed comparisons of the air quality variations encountered when commuting through a city offers the urban traveller more informed choice on how to minimise personal exposure to inhalable pollutants. In this study we report on an experiment designed to compare atmospheric contaminants, in this case, PM2.5 inhaled during rickshaw, bus, metro, non-air-conditioned car, air-conditioned (AC)

The parameterizations of atmospheric turbulence dispersion in many commonly used numerical models are based on the similarity relations in highly flat and sparsely populated areas. Such parameterizations limit the applicability of the models for simulating heavy haze processes that frequently occur in densely populated urban areas with complex terrains. In this study, we examined the similarity relations

Vehicle emissions are an important factor in the deterioration of air quality in urban street canyons. To improve the air quality in urban street canyons, it is necessary to have a deep understanding of the mechanism of pollutant dispersion within the urban boundary layer. The transport process of pollutants in street canyons is essentially a convective mass transfer process. In this paper, a computational

The impact of urbanization on air quality is expected to vary based on how meteorology and the complex atmospheric chemistry would respond to prominent changes in land use land cover (LULC) taking place over several decades. The present study examines the aerodynamic impacts of an increase in the urban sprawls across the central National Capital Region, encompassing about 12,540 km2 area of India over

The problem of environmental pollution was troubling people in many cities in China, especially PM2.5 pollution. Aiming to a better understanding the influence of long-range transport sources and health effect of PM2.5 in Ji'nan, a field observation was carried out in from 23 December 2016 to 25 April 2017. The results showed that primary organic carbon (POC), secondary organic carbon (SOC) and element

In this study, the impacts of land use and land cover (LULC) change, four–dimensional data assimilation (FDDA), Topo-wind and urban canopy module (UCM) schemes on meteorology and air quality were investigated with the latest LULC data in Weather Research and Forecasting Model-Community Multiscale Air Quality (WRF-CMAQ) by scenarios analysis. Results showed that LULC change had significant effects on

Due to the lack of ground monitoring data, current research on ambient fine particulate matter (PM2.5) is limited to mass concentration, and few studies have investigated climatology of PM2.5 components in China. The Version 2 Modern-Era Retrospective analysis for Research and Applications (MERRA-2) data provides a series of surface PM2.5 component datasets, including black carbon (BC), organic carbon

Hygroscopic particulate salts on leaf surfaces may facilitate the formation of microscopic leaf wetness, wax degradation, and enhanced of trace gas exchange in forest environments. In order to investigate the interaction of microscopic leaf wetness and dry-deposited inorganic compounds, a field campaign that combined measurements using electrical conductance sensors and leaf washing techniques was

This paper presents an analysis of data from a wind tunnel study conducted to examine the dispersion of emissions at the edges of near-road noise barriers. The study is motivated by the concern that a barrier positioned downwind of a roadway may guide highly polluted plumes along the barrier leading to heightened concentrations as the plume spills around and downwind of the barrier end. The wind tunnel

Sensor based monitoring systems have been indicated as a promising tool to increase information on spatio-temporal distribution of air pollution but several issues have been raised about the accuracy of such monitors when used in the field. The study aimed at assessing the performance of sensor based systems after multiple relocation in different seasons and sites. The systems included electrochemical

Air pollution poses significant threat to human health and the environment, as well as millions of people's quality of life. Air pollution in Jakarta, one of the megacities in Asia, has attracted concern from the government and the public. Long term air quality monitoring of fine and coarse atmospheric particulate matter (PM) was conducted in Central Jakarta from 2010 to 2019. The PM samples were collected

Mersin is industrialized city with 1.8 million people, a dense port, and different industries. The region is under the influence of mineral dust transport originated from the arid and semi-arid regions, mainly in spring and autumn. Planetary boundary layer height (PBLH) is one of major parameters influencing surface air quality. In this study, the relationship between particulate matters having diameter

Ozone episodes were observed frequently in Biga Peninsula of Marmara region in Turkey which is suburban site and has forests and agricultural areas. This study aims to understand the role of atmospheric conditions that lead to the ozone episodes over the Biga Peninsula. Ozone concentrations were measured at the monitoring stations for three years (2013–2015) to identify and characterize the ozone episodes

To investigate the characteristics and influencing factors of the heavy metal pollution in surface dust of driving schools, 128 dust samples have been collected from 22 driving schools in Wuhu city, Anhui province. The distribution characteristics, sources and ecological risks of Co, Cr, Cu, Ni, Pb and Zn in the surface dust of driving schools are under detailed analysis. The results showed the elements

The Chinese government implemented strict emission reduction measures of air pollution between 2013 and 2017. However, from the winter of 2017 until February 2020, during the COVID-19 pandemic, the twenty explosive rise (ER) events of PM2.5 mass in twelve heavy aerosol pollution episodes (HPEs) still appeared in Beijing and its vicinity (BIV). To explore the controlling mechanism for the ER under the

Currently, the population spends most of the time in indoor environments, which makes Indoor Air Quality (IAQ) very important for health and comfort. As vegetation can act as a biofilter capturing air pollutants, this study aims to assess the effectiveness of a living wall module in the removal of the Total Volatile Organic Compounds (TVOCs) for IAQ improvement. An airtight glass chamber was used to

The severe economic and disease burden caused by air pollution have become a public health concern. A great number of studies have proved that air pollution had an impact on mortality, but the association between air pollution and years of life lost (YLL) remains indistinct. The mortality data between January 1, 2008 to December 31, 2012 was collected from the China National Mortality Surveillance

In spite of the global outcry for urgent action against air pollution, most African countries lack functional air quality monitoring stations and data there from; making air quality management difficult. Therefore, stand-alone studies are reviewed to provide information on air pollutant levels, sources, spatial and seasonal variation across the continent. Air quality studies are limited in Africa.

Air quality has been associated with human health and with issues related to the climate, water, agriculture, and the economy across the world. NO2 is one of the main pollutants in the atmosphere; therefore, it is essential to analyze the quantitative changes and spatial distribution of NO2. The spatiotemporal changes in the vertical column densities and related influencing factors of tropospheric

In view of the spatial and temporal gaps left by the ground monitoring network for fine particulate matter (PM2.5), remote sensing has been regarded as an effective monitoring alternative to provide data of the PM2.5 distribution at a high resolution. Satellite-derived aerosol optical depth (AOD) is a parameter that has a good correlation with the PM2.5 concentration. In this study, a modified deep

Horses are used mainly for sports and leisure activities and are predominantly kept in closed individual straw-bedded stalls for a long time during the day, especially in cold weather. Horses are may therefore be exposed to high concentrations of particulate matter and microorganisms from the bedding and fodder material. The dangers posed by exposure the horses to high pollutant concentrations for

North China Plain (NCP) is one of the most of heavily polluted regions in the world, air pollution associated with haze threatens human health. A high PM2.5 concentration event in the NCP from 30 November to 10 December 2017 was simulated and analyzed by using the Weather Research and Forecasting (WRF) model and the Nested Air Quality Prediction Modeling System (NAQPMS) with an integrated analysis

Atmospheric particulate matter of two size fractions (i.e., PM2.5 and PM10) were sampled simultaneously at an urban site in Doha, Qatar, and characterized to measure chemical constituents (including trace elements, organic and elemental carbon (OC/EC), and water-soluble ions). The composition data were applied to mass closure analysis and Positive Matrix Factorization (PMF) model along with detailed

As people desire contact with the natural environment and comfortable living, modern buildings are increasingly incorporating the design of courtyard spaces. Hence, it is of interest to investigate the fungal air quality of courtyard spaces. This study aimed to investigate seasonal patterns of airborne fungal concentration, particlesize distribution, and taxonomic composition by using air microbial

Based on the ground-level observed NO2 concentration, satellite-observed NO2 column concentration from the Ozone Monitoring Instrument (OMI) and meteorological parameters, we comprehensively consider the seasonal and regional differences in the relationship between NO2 column concentration and measured NO2 concentration and establish a two-stage combined ground NO2 concentration estimation (TSCE-NO2)