A5015385249- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Air Quality Monitoring and Forecasting
- Meteorological Phenomena and Simulations
- Climate variability and models
- Mercury impact and mitigation studies
- Tropical and Extratropical Cyclones Research
- Climate Change Policy and Economics
- Environmental Impact and Sustainability
- Toxic Organic Pollutants Impact
- Vehicle emissions and performance
- Fire effects on ecosystems
- Machine Learning and ELM
- CO2 Sequestration and Geologic Interactions
- Ionosphere and magnetosphere dynamics
- Industrial Gas Emission Control
- Ocular Diseases and Behçet’s Syndrome
- Spacecraft Design and Technology
- Ocean Waves and Remote Sensing
- Evaluation Methods in Various Fields
- Spectroscopy and Laser Applications
- Geophysics and Gravity Measurements
China University of Geosciences
2025
Wenzhou Medical University
2025
Hunan University
2024
Goddard Space Flight Center
2014-2024
Morgan State University
2021-2024
Universities Space Research Association
2013-2022
Earth System Science Interdisciplinary Center
2018
University of Maryland, College Park
2018
Science Systems and Applications (United States)
2018
University of Iowa
2018
This paper provides a synthesis of results that have emerged from recent modeling studies the potential sensitivity U.S. regional ozone (O3) concentrations to global climate change (ca. 2050). research has been carried out under auspices an ongoing Environmental Protection Agency (EPA) assessment effort increase scientific understanding multiple complex interactions among climate, emissions, atmospheric chemistry, and air quality. The ultimate goal is enhance ability quality managers...
Abstract. Topic 3 of the Model Inter-Comparison Study for Asia (MICS-Asia) Phase III examines how online coupled air quality models perform in simulating high aerosol pollution North China Plain region during wintertime haze events and evaluates importance radiative microphysical feedbacks. A comprehensive overview MICS-Asia study design, including descriptions participating model inputs, experimental designs, results evaluation, are presented. Six modeling groups from China, Korea United...
Abstract. Spatiotemporal variations of ozone (O3) and nitrogen oxide (NOx) mixing ratios from 14 state-of-the-art chemical transport models (CTMs) are intercompared evaluated with O3 observations in East Asia, within the framework Model Inter-Comparison Study for Asia Phase III (MICS-Asia III). This study was designed to evaluate capabilities uncertainties current CTMs simulations provide multi-model estimates pollutant distributions. These were run by independent groups working China,...
Abstract. Despite the significant progress in improving chemical transport models (CTMs), applications of these modeling endeavors are still subject to large and complex model uncertainty. The Model Inter-Comparison Study for Asia III (MICS-Asia III) has provided opportunity assess capability uncertainty current CTMs East Asian applications. In this study, we have evaluated multi-model simulations nitrogen dioxide (NO2), carbon monoxide (CO) ammonia (NH3) over China under framework MICS-Asia...
Abstract. The land surface plays a crucial role in regulating water and energy fluxes at the land–atmosphere (L–A) interface controls many processes feedbacks climate system. Land cover vegetation type remains one key determinant of soil moisture content that impacts air temperature, planetary boundary layer (PBL) evolution, precipitation through soil-moisture–evapotranspiration coupling. In turn, it will affect atmospheric chemistry quality. This paper presents results modeling study effect...
Abstract. We present a new method to infer emissions and lifetimes of nitrogen oxides (NOx) based on tropospheric dioxide (NO2) observations together with reanalysis wind fields for cities located in polluted backgrounds. Since the accuracy is difficult assess due lack “true values” that can be used as benchmark, we apply synthetic NO2 derived from NASA-Unified Weather Research Forecasting (NU-WRF) model at high horizontal spatial resolution 4 km × over continental United States. compare...
Abstract. Topic 3 of the Model Inter-Comparison Study for Asia (MICS-Asia) Phase III examines how online coupled air quality models perform in simulating wintertime haze events North China Plain region and evaluates importance aerosol radiative feedbacks. This paper discusses estimates forcing, feedbacks, possible causes differences among participating models. Over Beijing–Tianjin–Hebei (BTH) region, ensemble mean estimated direct forcing (ADRF) at top atmosphere, inside surface are −1.1,...
Abstract. Satellite-derived spatiotemporal patterns of nitrogen oxide (NOx) emissions can improve accuracy emission inventories to better support air quality and climate research policy studies. In this study, we develop a new method by coupling the chemical transport Model-Independent SATellite-derived Emission estimation Algorithm for Mixed-sources (MISATEAM) with divergence map high-resolution NOx across US cities using TROPOspheric Monitoring Instrument (TROPOMI) tropospheric dioxide...
Open fire biomass burning and domestic biofuel (e.g., cooking, heating, charcoal making) algorithms have been incorporated into a terrestrial ecosystem model to estimate CO 2 key reactive GHGs (CO, NO x , NMHCs) emissions for the year 2000. The are calculated over globe at 0.5° × spatial resolution using tree density imagery, two separate sets of data each global area burned land clearing croplands, along with consumption rate data. estimated annual total dry matter (DM) due open ranges...
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...
To evaluate and compare the diagnostic accuradcy of three Fuchs' Uveitis Syndrome (FUS) criteria-La Hey Diagnostic Criteria (LHDC), Standardization Nomenclature (SUN) Criteria, Yang's Revised (RDC)-in absence a universally accepted gold standard. A multicenter, case-control study was conducted with 673 patients (331 FUS 342 non-FUS) from tertiary eye centers in China. Sensitivity, specificity, area under curve (AUC) values were calculated compared across criteria. RDC demonstrated highest...
The role of biogenic emissions in the production ground‐level ozone has been subject considerable scientific investigation. However, because existing studies generally draw their conclusions from simulations episodes lasting days to a week, there is need evaluate impact over relatively long timescale. Moreover, magnitude synergistic interaction between anthropogenic and should be carefully quantified, this issue not accounted for most previous investigations. In study, we performed summer...
The relative contributions of projected future emissions and climate changes to U.S. surface ozone concentrations are investigated focusing on California, the Midwest, Northeast, Texas. By 2050 regional average increase by 2–15% under IPCC SRES A1Fi (“dirty”) scenario, decrease 4–12% B1 (relatively “clean”) scenario. However, magnitudes differ significantly between major metropolitan rural areas. These dominated in 61% area contiguous but largely determined 46% In responses changes, biogenic...
Abstract. Horizontal grid resolution has a profound effect on model performances meteorology and air quality simulations. In contribution to MICS-Asia Phase III, one of whose goals was identify reduce uncertainty in prediction, this study examined the impact simulation over East Asia, focusing North China Plain (NCP) region. The NASA Unified Weather Research Forecasting (NU-WRF) been applied with horizontal resolutions at 45, 15, 5 km. results revealed that, comparison ground observations,...
Abstract. This study compares the performance of 12 regional chemical transport models (CTMs) from third phase Model Inter-Comparison Study for Asia (MICS-Asia III) on simulating particulate matter (PM) over East (EA) in 2010. The participating include Weather Research and Forecasting model coupled with Community Multiscale Air Quality (WRF-CMAQ; v4.7.1 v5.0.2), Regional Atmospheric Modeling System CMAQ (RAMS-CMAQ; chemistry (WRF-Chem; v3.6.1 v3.7.1), Goddard Earth Observing (GEOS-Chem), a...
Natural emissions of nonmethane volatile organic compounds (NMVOCs) play a crucial role in the oxidation capacity lower atmosphere and changes concentrations major greenhouse gases (GHGs), particularly methane tropospheric ozone. In this study, we integrate global biogenic model within terrestrial ecosystem to investigate vegetation soil key indirect GHGs, e.g., isoprene, monoterpene, other NMVOCs (OVOC), CO, NOx. The combination high‐resolution with satellite data allows investigation...
Abstract. Atmospheric mercury is a toxic air and water pollutant that of significant concern because its effects on human health ecosystems. A mechanistic representation the atmospheric cycle developed for state-of-the-art global climate-chemistry model, CAM-Chem (Community Model with Chemistry). The model simulates emission, transport, transformation deposition (Hg) in three forms: elemental (Hg(0)), reactive (Hg(II)), particulate (PHg). Emissions include those from human, land, ocean,...
A regional modeling system that integrates the state-of-the-art emissions processing (SMOKE), climate (CWRF), and air quality (CMAQ) models has been combined with satellite measurements of fire activities to assess impact on contiguous United States (CONUS) during 1997–2016. The realistically reproduced spatiotemporal distributions observed meteorology surface quality, a slight overestimate ozone (O3) by ~4% underestimate PM2.5 ~10%. simulation showed impacts primary pollutants such as CO...
Kinetics for reactions of phenoxy radical, C6H5O, with itself and O3 were examined at 298 K low pressure (1 Torr) using discharge flow coupled mass spectrometry (DF/MS). The rate constant the radical self-reaction was determined to be k1 = (1.49 ± 0.53) × 10−11 cm3 molecule−1 s−1 defined by d[C6H5O]/dt=−2 k1[C6H5O]2. C6H5O reaction measured k2 (2.86 0.35) 10−13 s−1, which may a lower limit value. Because much higher atmospheric abundance ozone than that both NO phenoxy, represent principal...
An air quality modeling system was used to simulate the effects on ozone concentration in northeast USA from climate changes projected through end of twenty-first century by National Center for Atmospheric Research’s (NCAR’s) parallel model, a fully coupled general circulation under higher and lower scenario future global concentrations radiatively active constituents. The calculations were done with both chemistry-transport model regional focused USA. simulations assumed no anthropogenic...