A5008239597- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Healthcare Policy and Management
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Global Health Care Issues
- Primary Care and Health Outcomes
- Air Quality Monitoring and Forecasting
- Seismic Imaging and Inversion Techniques
- earthquake and tectonic studies
- Hydraulic Fracturing and Reservoir Analysis
- Health Systems, Economic Evaluations, Quality of Life
- Atmospheric aerosols and clouds
- Groundwater and Isotope Geochemistry
- CO2 Sequestration and Geologic Interactions
- Vehicle emissions and performance
- Reservoir Engineering and Simulation Methods
- Hydrocarbon exploration and reservoir analysis
- High-pressure geophysics and materials
- Bioenergy crop production and management
- Geological and Geochemical Analysis
- Patient Satisfaction in Healthcare
- Marine and coastal ecosystems
- Housing Market and Economics
- Hospital Admissions and Outcomes
Research Center for Eco-Environmental Sciences
2018-2024
Chinese Academy of Sciences
2007-2024
Boston University
2020-2024
University of Chinese Academy of Sciences
2018-2024
China Meteorological Administration
2020-2024
RAND Corporation
2023-2024
Lanzhou Institute of Chemical Physics
2024
University of Southern California
2015-2024
Institute of Atmospheric Physics
2023-2024
State Key Joint Laboratory of Environment Simulation and Pollution Control
2023
Nitrous acid (HONO) is a major precursor of tropospheric hydroxyl radical (OH) that accelerates the formation secondary pollutants. The HONO sources, however, are not well understood, especially in polluted areas. Based on comprehensive winter field campaign conducted at rural site North China Plain, box model (MCM v3.3.1) was used to simulate daytime budget and nitrate formation. We found photolysis acted as dominant source for primary OH with contribution more than 92%. observed could be...
Summertime HONO concentrations were synchronously measured at two (agricultural and nonagricultural) sites in the North China Plain (NCP). Daytime (1.4 ± 0.6 ppbv) HONO/NO2 ((12 8)%) over agricultural field after fertilization found to be remarkably higher than those before fertilization, implying strong emission from fertilized fields. Synchronous enhancements of O3 both suggested that emitted accelerated local regional pollution. budget analysis further revealed its was significantly...
Abstract. In the summer of 2018, a comprehensive field campaign, with measurements on HONO and related parameters, was conducted at foot (150 m a.s.l.) summit Mt. Tai (1534 in central North China Plain (NCP). With implementation 0-D box model, budget six additional sources its role radical chemistry station were explored. We found that model default source, NO + OH, could only reproduce 13 % observed HONO, leading to strong unknown source strength up 3 ppbv h−1. Among sources, NO2 uptake...
Abstract Nitrous acid (HONO) is the major precursor of hydroxyl (OH) radicals to initiate tropospheric chemistry leading formation secondary pollutants. The sources atmospheric HONO, however, are not fully understood. Here we show two additional HONO that stem from oxidation nitrogen oxide (NO x = NO + 2 ). Nitric (HNO 3 ) formed photooxidation can be converted into with a yield ~53%, and dark by in presence H O produces 2%. diurnal variations levels field observations urban (Beijing) rural...
Gaseous nitrous acid (HONO) is a critical source of hydroxyl radicals (OH) in the troposphere. While both direct and secondary sources contribute to atmospheric HONO, emissions have traditionally been considered minor contributors. In this study, we developed δ 15 N 18 O isotopic fingerprints identify six HONO emission conducted 1-y case study on composition at rural urban sites. Interestingly, identified that livestock farming previously overlooked determined its ammonia (NH 3 ) ratio....
We measure
Particulate nitrate (NO3–) has currently become the major component of fine particles in North China Plain (NCP) during winter haze episodes. However, contributions formation pathways to ground NO3– NCP are not fully understood. Herein, were comprehensively investigated based on model simulations combined with two-month field measurements at a rural site NCP. The results indicated that nocturnal chemistry N2O5 hydrolysis aloft could contribute evidently pollution episodes high aerosol water...
Severe ozone (O3) pollution has been a major air quality issue and affects environmental sustainability in China. Conventional mitigation strategies focusing on reducing volatile organic compounds nitrogen oxides (NOx) remain complex challenging. Here, through field flux measurements laboratory simulations, we observe substantial nitrous acid (HONO) emissions (FHONO) enhanced by fertilizer application at an agricultural site. The observed FHONO significantly improves model performance...
Abstract. Long-range transport of Asian dust and air pollutants are major environmental concerns Taiwan during the winter monsoon season when northeasterly winds prevail following passages cold fronts. Based on hourly measurements Environmental Protection Administration (TEPA) quality monitoring stations, Lidar in-situ IC, a significant long-range event 18 March 2005 has been identified. During this episode, drastically elevated concentrations PM10, CO SO2 along with strong were observed...
During haze periods in the North China Plain, extremely high NO concentrations have been observed, commonly exceeding 1 ppbv, preventing classical gas-phase H2O2 formation through HO2 recombination. Surprisingly, mixing ratios of about ppbv were observed repeatedly winter 2017. Combined field observations and chamber experiments reveal a photochemical in-particle H2O2, driven by transition metal ions (TMIs) humic-like substances (HULIS). In experiments, steady-state 116 ± 83 pptv upon...
In recent years direct ownership of physician practices by hospitals and health systems (that is, vertical integration) has become a prominent feature the US care system. One unexplored impact integration is on referral patterns for common diagnostic tests procedures associated spending. Using 100 percent sample 2013–16 Medicare fee-for-service claims data, we examined whether hospital system was with changes in site reimbursement rates ten imaging laboratory services. After integration,...
The coexistence and coupling of capacitive memristive effects have been an important subject scientific interest. While the effect in memristors has extensively studied, reciprocal scenario capacitors remains unexplored. In this study, we introduce a supercapacitor-memristor (CAPistor) concept, which is constructed by leveraging non-linear ion transport within pores metal-organic framework zeolitic-imidazolate (ZIF-7). Within nanochannels ZIF-7 electrode aqueous pseudocapacitor, anionic species (OH
We examine the relationships between hurricanes, flood risk saliency, and residential property investment. Our analysis utilizes data detailing capital investment projects in homes matched to spatial delineating locations of structures damaged by Hurricane Sandy. Utilizing a difference-in-differences estimation strategy, we estimate significant increase probability homeowner invests building located area. However, fail detect statistically change rate among properties outside these areas....
Atmospheric nitrous acid (HONO) is a dominant precursor of hydroxyl (OH) radicals, and its formation mechanisms are still controversial. Few studies have simultaneously explored effects different combustion processes on HONO sources. Hereby, synchronous measurement in urban (BJ), suburban (XH) rural (DBT) areas with performed the North China Plain winter. A box model utilized to analyze mechanisms. concentration highest at DBT site (2.51 ± 1.90 ppb), followed by XH (2.18 1.95 ppb) BJ (1.17...
Abstract Mitigating the hazard of fault reactivation during CO injection and oil production is important for ensuring environmental sustainability geologic carbon sequestration hydrocarbon recovery. Currently, we do not know how Coulomb Failure Stress (CFS), which a commonly used metric to assess potential inducing slip on fault, evolves differently gas scenarios. Using high‐resolution simulations injection‐induced production‐induced theories failure poroelasticity, address this gap in...