A5080263370- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Atmospheric aerosols and clouds
- Indoor Air Quality and Microbial Exposure
- Atmospheric and Environmental Gas Dynamics
- Toxic Organic Pollutants Impact
- Vehicle emissions and performance
- Odor and Emission Control Technologies
- Water Quality and Pollution Assessment
- Water Quality Monitoring and Analysis
- Hydrocarbon exploration and reservoir analysis
- Isotope Analysis in Ecology
- Metabolomics and Mass Spectrometry Studies
- Environmental and Industrial Safety
- NMR spectroscopy and applications
- Climate Change Communication and Perception
- Environmental and Agricultural Sciences
- Environmental Changes in China
- Advanced biosensing and bioanalysis techniques
- Pharmaceutical and Antibiotic Environmental Impacts
- Cryospheric studies and observations
- Nanocluster Synthesis and Applications
- Peatlands and Wetlands Ecology
Tianjin University
2019-2025
Institute of Atmospheric Physics
2016-2025
Chinese Academy of Sciences
2016-2025
Max Planck Institute for Chemistry
2020-2025
University of South China
2023
University of Chinese Academy of Sciences
2017-2021
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry
2021
Czech Academy of Sciences, Institute of Atmospheric Physics
2020
Abstract. Measurements of OH, HO2, complex RO2 (alkene- and aromatic-related RO2) total radicals taken during the integrated Study AIR Pollution PROcesses in Beijing (AIRPRO) campaign central summer 2017, alongside observations OH reactivity, are presented. The concentrations were elevated, with reaching up to 2.8×107moleculecm-3, HO2 peaking at 1×109moleculecm-3 concentration 5.5×109moleculecm-3. reactivity (k(OH)) peaked 89 s−1 night, a minimum afternoon ≈22s-1 on average. An experimental...
Rapid warming in the Arctic has a huge impact on global environment. Atmospheric brown carbon (BrC) is one of least understood and uncertain agents due to scarcity observations. Here, we performed direct observations atmospheric BrC quantified its light-absorbing properties during 2-month circum-Arctic cruise summer 2017. Through observation-constrained modeling, show that BrC, mainly originated from biomass burning mid- high latitudes Northern Hemisphere (∼60%), can be strong agent region,...
Abstract. Wintertime in situ measurements of OH, HO2 and RO2 radicals OH reactivity were made central Beijing during November December 2016. Exceptionally elevated NO was observed on occasions, up to ∼250 ppbv. The daily maximum mixing ratios for radical species varied significantly day-to-day over the ranges 1–8×106 cm−3 (OH), 0.2–1.5×108 (HO2) 0.3–2.5×108 (RO2). Averaged full observation period, mean daytime peak 2.7×106, 0.39×108 0.88×108 total RO2, respectively. main source new via...
Abstract. The Atmospheric Pollution and Human Health in a Chinese Megacity (APHH-Beijing) programme is an international collaborative project focusing on understanding the sources, processes health effects of air pollution Beijing megacity. APHH-Beijing brings together leading China UK research groups, state-of-the-art infrastructure quality models to work four themes: (1) sources emissions pollutants; (2) atmospheric affecting urban pollution; (3) exposure impacts; (4) interventions...
Abstract. There is considerable interest in using low-cost optical particle counters (OPCs) to supplement existing routine air quality networks that monitor mass concentrations. In order do this, OPC data need be comparable with reference instrumentation; however, there currently no widely agreed upon methodology accomplish this. Aerosol hygroscopicity known a key parameter consider when correcting concentrations derived from OPCs, particularly at high ambient relative humidity (RH)....
Abstract Bioaerosols and humic-like substances (HULIS) are important components of atmospheric aerosols, which can affect regional climate by acting as cloud condensation nuclei some damage human health. Up to date, release bioaerosols HULIS initiated precipitation is still poorly understood. Here we present different processes for bioaerosols, non-bioaerosols during a event in Beijing, China. Large fungal-spore-like aerosols were emitted at the onset later weak stage precipitation, number...
Abstract. Firework (FW) emission has strong impacts on air quality and public health. However, little is known about the molecular composition of FW-related airborne particulate matter (PM), especially organic fraction. Here we describe detailed Beijing PM collected before, during, after a FW event in evening New Year's Eve 2012. Subgroups CHO, CHON, CHOS were characterized using ultrahigh-resolution Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. These subgroups...
Abstract Biomass burning (BB) aerosols, primary biological aerosol particles, and secondary organic are critical components of particulate matter in the atmosphere. In this study, saccharides, lignin/resin acids, biogenic aerosols tracers, aromatic hydroxyacids/polyacids were measured total suspended particles collected from April 2012 to March 2013 at an urban site Beijing using gas chromatography/mass spectrometry. The concentration levoglucosan was elevated during 18–20 June. high ratio...
Abstract. This study investigates the seasonal variation, molecular distribution and stable carbon isotopic composition of diacids, oxocarboxylic acids α-dicarbonyls to better understand sources formation processes fine aerosols (PM2.5) in Beijing. The concentrations total dicarboxylic varied from 110 2580 ng m−3, whereas oxoacids (9.50–353 m−3) dicarbonyls (1.50–85.9 were less abundant. Oxalic acid was found be most abundant individual species, followed by succinic or occasionally...
Abstract Primary biological aerosol particles are ubiquitous in the global atmosphere and can affect cloud formation, deteriorate air quality, cause human infections. Mt. Tai (1,534 m a.s.l.) is an elevated site North China Plain where atmospheric aerosols reflect both regional advection long‐range transport. In this study, we deployed a Wideband Integrated Bioaerosol Sensor (WIBS‐4A) collected total suspended eight‐stage size‐segregated samples at summit of spring from 21 March to 8 April...
Abstract Organosulfates (OSs), a key component of secondary organic aerosols (SOA), account for up to one third matter in the atmosphere. However, high molecular weight (HMW, 500–800 Da) OSs ambient are poorly characterized at level, due experimental difficulties. With Fourier transform‐ion cyclotron resonance mass spectrometry (FT‐ICRMS), we able identify more than 8,000 wintertime Beijing. We found that both number and signal magnitudes HMW with low H/C O/C ratios degrees unsaturation were...
Peatland wildfires contribute significantly to the atmospheric release of light-absorbing organic carbon, often referred as brown carbon. In this study, we examine presence nitrogen-containing compounds (NOCs) within marine aerosols across Western Pacific Ocean, which are influenced by peatland fires from Southeast Asia. Employing ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) in electrospray ionization (ESI) positive mode, discovered that NOCs...
Abstract Organic matter in the gas‐phase and particles are important components of atmosphere. Photochemical degradation is a major transformation pathway atmospheric organic matter, which changes atmospherically related life time environmental, climatic, health‐related effects as well biogeochemical cycles elements. In addition to field observations model simulations, laboratory experiments based on smog chambers flow tubes approaches study photodegradation mechanisms influencing factors...
Abstract. The impact of heterogeneous uptake HO2 on aerosol surfaces radical concentrations and the O3 production regime in Beijing summertime was investigated. coefficient onto surfaces, γHO2, calculated for AIRPRO campaign Beijing, summer 2017, as a function measured soluble copper concentration, [Cu2+]eff, liquid water content, [ALWC], particulate matter [PM]. An average γHO2 across entire 0.070±0.035 calculated, with values ranging from 0.002 to 0.15, found be significantly lower than...
Hydroxymethanesulfonate (HMS), the product of HSO3– and SO32– reacting with dissolved formaldehyde in fog, cloud, aerosol liquid water, has been suggested to be an important source particulate sulfur during haze events. However, there have limited studies high concentrations HMS atmospheric aerosol. We report here two feasible analytical methods for identification using ion chromatography UHPLC-LTQ-Orbitrap mass spectrometry. The fine particles wintertime Beijing ranged from below detection...
The current research paradigm for the environmental dissemination of antibiotic resistance genes (ARGs) focuses on those harbored within bacteria (i.e., intracellular fraction). Understanding both and extracellular ARGs has particular implications flux fate that are airborne via fine particulate matter (PM2.5) from ambient atmosphere to human airway. In this study, we developed an operationally defined protocol urban PM2.5 quantify abundance occurring in free phage-associated DNA, addition...
The chemical composition of dissolved organic sulfur in snow is important understanding the sources and scavenging processes atmospheric matter. Snow samples collected simultaneously from four megacities North China were analyzed using ultra-high-resolution Fourier transform ion cyclotron resonance mass spectrometry. modified oxygen redefined aromaticity index help interpretation possible structural information evaluation sulfur-containing molecules. By extending these parameters, we provide...
Online detection of bioaerosols based on the light-induced fluorescence (LIF) technique is still challenging due to complexity and external/internal mixing with nonbiological fluorescent compositions. Although many lab studies have measured properties biological materials, there a scarcity knowledge sources aerosol particles (FAP) in ambient atmosphere. Here, we fill this gap by combining online measurement an LIF-based instrument (wideband integrated bioaerosol sensor, WIBS, 0.8–20 μm)...