A5002510778- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Vehicle emissions and performance
- Air Quality Monitoring and Forecasting
- Climate Change and Health Impacts
- Climate variability and models
- Child Nutrition and Water Access
- Hydrocarbon exploration and reservoir analysis
- Thermoregulation and physiological responses
- Energy and Environment Impacts
- Oil, Gas, and Environmental Issues
- Sepsis Diagnosis and Treatment
- Hydrology and Watershed Management Studies
- Birth, Development, and Health
- Remote Sensing in Agriculture
- Viral gastroenteritis research and epidemiology
- Flood Risk Assessment and Management
- Coal Properties and Utilization
- Graphene research and applications
- COVID-19 impact on air quality
- Cardiac Ischemia and Reperfusion
- Traumatic Brain Injury and Neurovascular Disturbances
Guangxi Medical University
2025
Anhui Jianzhu University
2025
University of Maryland, College Park
2015-2024
NOAA Oceanic and Atmospheric Research
2024
Guilin University of Technology
2024
Earth System Science Interdisciplinary Center
2013-2023
Xian Yang Central Hospital
2023
Beijing National Laboratory for Molecular Sciences
2022-2023
Peking University
2022-2023
Pingliang People's Hospital
2023
Abstract. The Ozone Monitoring Instrument (OMI) onboard NASA's Aura satellite has been providing global observations of the ozone layer and key atmospheric pollutant gases, such as nitrogen dioxide (NO2) sulfur (SO2), since October 2004. data products from same instrument provide consistent spatial temporal coverage permit study anthropogenic natural emissions on local-to-global scales. In this paper, we examine changes in SO2 NO2 over some world's most polluted industrialized regions during...
Severe haze is a major public health concern in China and India. Both countries rely heavily on coal for energy, sulfur dioxide (SO2) emitted from coal-fired power plants industry pollutant contributing to their air quality problems. Timely, accurate information SO2 sources required input models pollution prediction mitigation. However, such has been difficult obtain these two countries, as fast-paced changes economy environmental regulations have often led unforeseen emission changes. Here...
Abstract. North China Plain (NCP) is one of the most populated and polluted regions in China. During recent years, haze fog occur frequently cause severely low visibility this region. In order to better understand impact aerosol particles on formation fog, a long-term record occurrences past 56 yr (from 1954–2009) over NCP analyzed. The results show that there are rapid changes NCP. were during 1970–1980, reached maximum 1981–1998. After 1999, slightly decreased. There was nonlinear...
Abstract. A multi-axis differential optical absorption spectroscopy (MAX-DOAS) instrument was deployed in May and June 2016 at a monitoring station (37.18∘ N, 114.36∘ E) the suburban area of Xingtai, which is one most polluted cities North China Plain (NCP), during Atmosphere-Aerosol-Boundary Layer-Cloud (A2BC) experiment Air chemistry Research In Asia (ARIAs) joint experiments to derive tropospheric vertical profiles NO2, SO2, HONO, HCHO, CHOCHO aerosols. Aerosol depths derived from...
Abstract. Global coupled chemistry–climate models underestimate carbon monoxide (CO) in the Northern Hemisphere, exhibiting a pervasive negative bias against measurements peaking late winter and early spring. While this has been commonly attributed to underestimation of direct anthropogenic biomass burning emissions, chemical production loss via OH reaction from emissions biogenic volatile organic compounds (VOCs) play an important role. Here we investigate reasons for using aircraft taken...
Myocardial ischemia/reperfusion (I/R) injury is the main cause of increasing postischemic heart failure and currently there no definite treatment for myocardial I/R injury. It has been suggested that oxidative stress-induced mitochondrial dysfunction plays an important role in pathological development I/R. In this study, Yiqi Huoxue (YQHX) prescription, as a kind Chinese herbal formula, was developed shown to alleviate Network analysis combined with ultrahigh-performance liquid...
SO 2 in central China was measured situ from an aircraft and remotely using the Ozone Monitoring Instrument (OMI) Aura satellite; results were used to develop a numerical tool for evaluating tropospheric sulfur budget ‐ sources, sinks, transformation transport. In April 2008, ambient concentrations decreased ∼7 ppbv near surface ∼1 at 1800 m altitude (an effective scale height of ∼800 m), but distinct plumes observed between 4500 m, aircraft's ceiling. These free play major role export...
Abstract Urban areas are responsible for a substantial fraction of anthropogenic emissions greenhouse gases (GHGs) including methane (CH 4 ), with the second largest direct radiative forcing relative to carbon dioxide (CO 2 ). Quantification urban CH is important establishing GHG mitigation policies. Comparison observation‐based and inventory‐based suggests possible improvements in estimating source environments. In this study, we quantify from Baltimore‐Washington area based on mass balance...
In a series of 10-day campaigns in Ontario and Quebec, Canada, between 2005 2007, ozonesondes were launched twice daily conjunction with continuous high-resolution wind-profiling radar measurements. Windprofilers can measure rapid changes the height tropopause, some cases follow stratospheric intrusions. Observed intrusions studied aid Lagrangian particle dispersion model Canadian operational weather forecast system. Definite stratosphere-troposphere transport (STT) events occurred...
Abstract. To provide insight into the planetary boundary layer (PBL) production of ozone (O3) over North China Plain, Air chemistry Research in Asia (ARIAs) campaign conducted aircraft measurements air pollutants Hebei Province, China, between May and June 2016. We evaluate vertical profiles trace gas species including O3, nitrogen oxides (NOx), carbon monoxide (CO), volatile organic compounds (VOCs) relate to rates O3 production. This analysis shows measured levels ranged from 45 146 ppbv,...
Abstract. Trends in the composition of lower atmosphere (0–1500 m altitude) and surface air quality over Baltimore/Washington area surrounding states were investigated for period from 1997 to 2011. We examined emissions ozone precursors monitors inventories as well ambient ground-level aircraft measurements characterize trends pollution. The US EPA Continuous Emissions Monitoring System (CEMS) program reported substantial decreases emission summertime nitrogen oxides (NOx) power plants, up...
Abstract Airborne mass balance experiments were conducted around the Washington, D.C.‐Baltimore area using research aircraft from Purdue University and of Maryland to quantify emissions nitrogen oxides (NO x = NO + 2 ) carbon monoxide (CO). The airborne supported Wintertime INvestigation Transport, Emissions, Reactivity (WINTER) campaign, an intensive study anthropogenic along Northeastern United States in February–March 2015, Fluxes Atmospheric Greenhouse Gases project which seeks provide...
Abstract WRF‐Chem simulations were performed for the March 2005 East Asian Studies of Tropospheric Aerosols: an International Regional Experiment (EAST‐AIRE) Intensive Observation Campaign (IOC) to investigate direct effects aerosols on surface radiation and air quality. Domain‐wide, showed a decrease 20 W/m 2 in shortwave (SW) due aerosol effect (ADE), consistent with observational studies. The ADE caused 24 h PM 2.5 (particulate matter diameter < µm) concentrations increase eastern...
Abstract One‐second in situ measurements of CO and 2 mole fractions were made aboard the National Aeronautics Space Administration DC‐8 aircraft during 2016 KORUS‐AQ joint air quality atmospheric chemistry field campaign South Korea. The ratio to enhancement is used characterize regional combustion source signatures. Calculations ∆CO/∆CO with a short duration rolling window (60 s), filtered by coefficient determination ( R ), plotted as distributions masses measured from campaign. sampling...
In the Asia-Pacific region (APR), extreme precipitation is one of most critical climate stressors, affecting 60% population and adding pressure to governance, economic, environmental, public health challenges. this study, we analyzed spatiotemporal trends in APR using 11 different indices revealed dominant factors governing amount by attributing its variability frequency intensity. We further investigated how these are influenced El Niño-Southern Oscillation (ENSO) at a seasonal scale. The...
Abstract High ambient temperatures intensify photochemical production of tropospheric ozone, leading to concerns that global warming may exacerbate smog episodes. This widely observed phenomenon has been termed the climate penalty factor (CPF). A variety meteorological and processes have suggested explain why surface ozone increases on hot days. Here, we quantify an anthropogenic previously overlooked: rise precursor emissions summer days due high electricity demand. Between 1997 2011, power...
Abstract. Sulfur dioxide (SO2) is a major atmospheric pollutant with strong anthropogenic component mostly produced by the combustion of fossil fuel and other industrial activities. As precursor sulfate aerosols that affect climate, air quality, human health, this gas needs to be monitored on global scale. Global climate chemistry models including aerosol processes along their radiative effects are important tools for quality research. Validation these against in-situ satellite measurements...
Abstract This paper addresses the questions of what effect local regulations can have on pollutants with different lifetimes and how surface observations remotely sensed data be used to determine impacts. We investigated decadal trends tropospheric sulfur dioxide (SO 2 ) aerosol pollution over Maryland its surrounding states, using surface, aircraft, satellite measurements. Aircraft measurements indicated fewer isolated SO plumes observed in summers, a ∼40% decrease column , ∼20% atmospheric...
Abstract Natural gas production in the United States has increased rapidly over past decade, along with concerns about methane (CH 4 ) fugitive emissions and its climate impacts. Quantification of CH from oil natural (O&NG) operations is important for establishing scientifically sound policies mitigating greenhouse gases. We use aircraft mass balance approach three flight experiments August September 2015 to estimate O&NG southwestern Marcellus Shale. a mean emission rate as 21.2...
Abstract. The Measurements of Pollution in the Troposphere (MOPITT) retrievals over urban regions have not been validated systematically, even though MOPITT observations are widely used to study CO regions. Here we compare products and non-urban with aircraft measurements from Deriving Information on Surface conditions Column Vertically Resolved Observations Relevant Air Quality (DISCOVER-AQ – 2011–2014), Studies Emissions Atmospheric Composition, Clouds, Climate Coupling by Regional Surveys...
Abstract. We investigated the ozone pollution trend and its sensitivity to key precursors from 1990 2015 in United States using long-term EPA Air Quality System (AQS) observations mesoscale simulations. The modeling system, a coupled regional climate–air quality model (CWRF-CMAQ; Climate-Weather Research Forecast Community Multiscale Quality), captured well summer surface during past decades, having mean slope of linear regression with AQS ∼0.75. While network has limited spatial coverage...
We analyze airborne measurements of atmospheric CO concentration from 70 flights conducted over six years (2015–2020) using an inverse model to quantify the emissions Washington, DC, and Baltimore metropolitan areas. found that have been declining in area at a rate ≈−4.5 % a–1 since 2015 or ≈−3.1 2016. In addition, we show "Sunday" effect, with being lower, on average, than for rest week seasonal cycle is no larger 16 %. Our results also trend derived NEI agrees well observed trend, but...
In this paper, multi-source observation, such as aircraft, ground-based remote sensing, and satellite-retrieved data, has been utilized to compare analyze the vertical characteristics of aerosol optical properties planetary boundary layer height (HPBL) over North China Plain (NCP) region during May–June 2016. Aircraft observations show profiles absorption coefficients (σabs), scattering (σsca), extinction (σext) gradually decrease with altitude, their maximum values near HPBL. The σext...