Xiaoqi Wang

Xiaoqi Wang
The University of Manchester · Centre for Applied Theatre Research

About

36
Publications
2,569
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610
Citations
Introduction

Publications

Publications (36)
Article
This study represents the first quantitative evaluation of pollution transport budget within the boundary layer of typical cities in the Beijing-Tianjin-Hebei (BTH) region from the perspective of horizontal and vertical exchanges and further discusses the impact of the atmospheric boundary layer (ABL)-free troposphere (FT) exchange on concentration...
Article
Full-text available
Civil aviation is an important source of air pollutants, but this field has received insufficient attention in China. Based on the standard emissions model of the International Civil Aviation Organization (ICAO) and actual flight information from 241 airports, this study estimated a comprehensive emissions inventory for 2010–2020 by considering the...
Article
Volatile organic compounds (VOCs) have been explicitly required to be controlled by national or local governments to tackle heavy PM2.5 pollution in China. However, the role of VOCs chemistry in PM2.5 is still far away from being fully understood. In this study, we selected a typically industrialized city of China, conducted VOCs online measurement...
Article
Beijing-Tianjin-Hebei and the surrounding area (BTHSA) shows the poorest air quality in China, reflected in sub-standard PM2.5 and increasingly pronounced O3 pollution, stressing the urgency for regional cooperation and collaborative control of PM2.5 and O3. With the aim to explore the cooperative regions and response mechanisms of PM2.5 and O3 in...
Article
Nationwide O3 has been deteriorating and shows an obvious spatial aggregation effect (SAE), while there are still many cities not meeting Chinese national standards for PM2.5, demonstrating the urgency for the collaborative control of PM2.5 and O3. This study adopted multiple mathematic models and data mining technologies, including Moran's I (MI),...
Article
Facing the elevated surface summer O3 over North China in recent years with the continuous NOx reduction, we conducted the ozone-precursor sensitivity study in summer (July) in Beijing–Tianjin–Hebei region (BTH) under the 2018 and 2014 emissions, based on WRF-Chem model. On 2018 emission condition, 30% precursor reduction simulations presented the...
Article
In this study, an advanced transport flux method based on the comprehensive stereoscopic observation verification was used to evaluate the contribution of transport to pollution in the North China Plain (NCP) and Sichuan Basin (SCB). The simulations were verified using fixed-point lidar and satellite observations, and the results demonstrated that...
Article
To effectively reduce the compound pollution of fine particulate matter (PM2.5) and ozone (O3), volatile organic compound (VOC) emission sources are being extensively studied. Studies on VOC emission characteristics have mainly focused on solvent-using and technological sources, while research on the combustion processes of high-energy-consuming in...
Preprint
Full-text available
This paper aims to study the trend of aircraft emission in China. The multiyear emission inventories of HC, CO, NO X , SO 2 and PM 2.5 in the period 2010–2030 were developed. Results show that the total amount of all targeted pollutants from China's civil airports climbed from approximately 82407 tons in 2010 to 164275 tons in 2019. It is expected...
Article
In this study, distributed lag nonlinear models (DLNM) were built to characterize the non-linear exposure-lag-response relationship between the concentration of PM2.5 and O3 and multiple influencing factors, including basic meteorological elements and precursors. Then, a stratified analysis of different years, seasons, pollution levels, and wind di...
Article
Local pollution and the cross-boundary transmission of pollutants between cities have an inevitable impact on the atmosphere. Quantitative assessments of the contribution of transport to pollution in inland and coastal cities are necessary for the implementation of practical, regional, and joint emission control strategies. In this study, the Compr...
Article
Beijing has achieved significant air quality improvement over the past decade. In this study, we applied a simulation technique on pollutant monitoring data to investigate the contribution of emission reduction (ERE) and meteorological effects (ME) to the improvement of air quality. We measured the daily PM2.5 concentrations during four months (rep...
Article
This study conducted a VOCs monitoring campaign in Jul and Oct of 2018, Jan and Apr of 2019 in Beijing urban area, to explore the atmospheric oxidation capacity and its impact on PM2.5 there through investigating the chemical behaviors of VOCs at a 1-h time resolution. We totally detected 53 VOCs in the atmosphere over Beijing, sum of them (TVOCs)...
Article
Characteristics of submicron particulate matter, including its components, during December 5–30, 2016, were comprehensively investigated in Beijing. The surface transport flux was calculated as well as the cross-border transport influence of Beijing and the North China Plain (NCP) on Beijing University of Technology (BJUT) based on the non-refracto...
Article
Full-text available
Beijing, the capital city of China, has achieved remarkable progress in terms of an improvement in air quality under strict control policies in the past 10 years from various sources. In this paper, the characteristics of fine particulate matter (PM2.5) and O3 in January 2013 and 2018 in Beijing are discussed on the basis of daily sample analysis a...
Article
A one-year observation of atmospheric peroxyacetyl nitrate (PAN) in the border of Beijing-Tianjin-Hebei (BTH) was conducted during 2018–2019 to assess the photochemical pollution in this region. PAN daily average was 2.23, 3.72, 5.34 and 2.44 ppb(v) in October, January, April and July. The higher PAN here compared to previous studies on urban Beiji...
Article
North China is recognized as one of the region with most severe air pollution in China, and the PM2.5 in six major cities (Beijing, Tianjin, Shijiazhuang, Taiyuan, Jinan and Zhengzhou) of this region was measured to be 108.7–186.0 μg m⁻³ in January 2017 and 39.2–56.3 μg m⁻³ in July 2017. This study conducts the meteorological and chemical simulatio...
Article
SO4²⁻, NO3⁻ and NH4⁺ (SNA) are the major components of particulate matter in Beijing. In this study, hourly concentrations of SNA in PM1 were measured through an Aerodyne Aerosol Chemical Speciation Monitor (ACSM) at an urban site of Beijing, from February 3rd to 20th of 2017. The analysis of the differences between two pollution cases during the s...
Article
The mixing layer height (MLH) plays an important role in atmospheric pollution by influencing the vertical diffusion of pollutants. The Aircraft Meteorological Data Relay (AMDAR) from the airports in Beijing (BJ) and Shijiazhuang (SJZ) during 2014–2017 was used to investigate temporal characteristics of the daily maximum MLH (MLHmax) and their rela...
Article
Beijing, one of the world's largest cities, has been tackling its severe air pollution problems in the past decades, and achieved pronounced reduction on PM2.5 concentration from 99.4 μg/m³ to 69.4 μg/m³ during 2013–2017. This study focused on the variation trends of SO4²⁻, NO3⁻ and NH4⁺ (SNA) of PM2.5 during this effective improvement period, thro...
Article
The Beijing–Tianjin–Hebei (BTH) region in the North China Plain (NCP) is significantly affected by inter–district, city and region transport, but systematic works on this aspect using flux calculation method remain insufficient. To obtain further insights into the temporal and spatial characteristics of PM2.5 flux, the Weather Research and Forecast...
Article
SO4²⁻, NO3⁻ and NH4⁺ are the important components of PM2.5 in China. This study developed a modeling-monitoring coupled approach to determining the sources of SO4²⁻ and NO3⁻ as well as the secondary oxidation ratio of SO2 to SO4²⁻, through a monitoring of PM2.5 in Beijing and Tangshan, and a WRF-CAMx simulation over North China. Measurement showed...
Article
Regional transport always plays a crucial role in the formation and dissipation of haze over the Beijing–Tianjin–Hebei (BTH) region. This study, conducted using pollution and meteorological observations and the Weather Research and Forecasting model (WRF) coupled with the Comprehensive Air Quality Model with Extensions (CAMx), investigated the poss...
Article
SO42 − and NO3⁻ are important chemical components of fine particulate matter (PM2.5), especially during haze periods. This study selected two haze episodes in Beijing, China with similar meteorological conditions. A monitoring-modeling approach was developed to estimate the secondary conversion ratios of sulfur and nitrogen based on monitored and s...
Article
The measurement of aerosols (PM1.0 and PM2.5) was conducted during 2016 and 2017 in Beijing, Tangshan and Shijiazhuang, investigating the spatial and temporal variations of aerosols and major chemical components. The WRF-Chem model was applied to simulate the impacts of aerosol direct and semi-direct feedbacks on meteorological factors and identify...
Article
A comprehensive observation was conducted to reveal the characteristics of submicron and fine aerosols and their chemical components in Beijing in autumn. The potential source contribution function (PSCF) and concentration weighted trajectory (CWT) model, Weather Research & Forecasting (WRF) and Comprehensive Air Quality Model with Extension (CAMx)...
Article
This study applied the CAMx model to study the regional transport of various PM2.5 components in Beijing during a severe pollution episodes. The results revealed that during the episodes, Beijing had the average PM2.5 pollution value of 119 µg m–3. It was 1.58 times of the PM2.5 national air quality standard (75 µg m–3 Level II). The wind speed was...
Article
In this study, the measurement of volatile organic compounds (VOCs) was conducted at Beijing Capital International Airport (ZBAA) and a background reference site in four seasons of 2015. Total concentrations of VOCs were 72.6 ± 9.7, 65.5 ± 8.7, 95.8 ± 11.0, and 79.2 ± 10.8 μg/m3in winter, spring, summer, and autumn, respectively. The most abundant...
Article
During the period of 2013-2015, a total of 34 PM2.5 pollution episodes occurred in Beijing, each of which remained for at least 2days. Among that, 28 times occurred in winter half year with the average concentration of 243.1μg/m(3) and summer half year with the average concentration of 194.1μg/m(3). These episodes were mainly associated with lower...
Article
The present paper is aimed at providing for a seasonal statistical report on the characteristic features and regional migration impact of PM2. 5 pollutants in Beijing in winter season. For the research purpose,we have collected and analyzed the pollution characteristics and regional migration features of PM2. 5 and the water-soluble ions in Beijing...
Article
The measurement of PM2.5 was conducted from 20th October to 25th November 2014, and 15th August to 15th September 2015 at Beijing, Shijiazhuang, and Tangshan, China, covering two important events of Asia-Pacific Economic Cooperation (APEC) and Grand Military Parade (Parade). A series of stringent emission-reduction measures were implemented in Beij...
Article
The objective of this paper is to propose a hybrid approach for the source apportionment of primary and secondary species of PM2.5 in the city of Tangshan. The receptor-based PMF (Positive Matrix Factorization) is integrated with the emission inventory (EI) to form the first hybrid method for the source apportionment of the primary species. The hyb...
Article
Full-text available
The success of the emission reduction measures undertaken by authorities in the Asia-Pacific Economic Cooperation summit 2014 demonstrated that the Beijing-Tianjin-Hebei air quality can be improved by introducing integrated emission reduction measures. This paper combines observation data, emission reduction measures, and air quality simulations th...
Article
The measurement of PM2.5 was conducted from 15th August to 17th September, 2015 in Shijiazhuang, China, covering the period of a ceremonial parade. The PM2.5 concentrations and the major chemical components were analyzed. The concentrations of PM2.5 was 26.5 µg m⁻³ during control, which were 57.0% and 51.1% lower compared to before and after contro...
Article
Full-text available
The ambient air quality in Beijing was comprehensively assessed based on the real-time pollutant concentrations monitored at urban, suburban, roadside, and background sites in 2013. The results showed that the annual average concentration for CO, NO2, SO2, O-3, PM2.5 and PM10 in 2013 was 2.0 mg m(-3), 55.6 mu g m(-3), 28.5 mu g m(-3), 48.0 mu g m(-...

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Project (1)
Project
A comprehensive biomass burning emission inventory including multi-species with high temporal and spatial resolution. A new approach for emission inventory calibration integrating technologies of multi-disciplines, including numerical simulation, observation and optical remote sensing method. The regional biomass indoor/outdoor burning emission inventory and the emission of typical biomass fuel indoor/outdoor burning based on the calibration methodology.