A5046880051- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- Water Quality Monitoring and Analysis
- Climate Change and Health Impacts
- Fire effects on ecosystems
- Plant responses to elevated CO2
- Climate variability and models
- Advanced Chemical Sensor Technologies
- Vehicle emissions and performance
- Urban Transport and Accessibility
- Maritime Transport Emissions and Efficiency
- Power Systems and Renewable Energy
- Chemistry and Chemical Engineering
- Environmental Policies and Emissions
- Plant Ecology and Soil Science
- Environmental Impact and Sustainability
- Climate Change Policy and Economics
- Climate Change, Adaptation, Migration
- Integrated Energy Systems Optimization
- Environmental and Industrial Safety
- Sports Performance and Training
NOAA Geophysical Fluid Dynamics Laboratory
2016-2025
Beijing Sport University
2025
National Oceanic and Atmospheric Administration
2016-2024
Princeton University
2015-2024
NOAA Oceanic and Atmospheric Research
2018
University of Wisconsin–Madison
2009-2010
Tokyo University of Science
2007-2008
The University of Tokyo
2007-2008
Dalian University
2004
Dalian University of Technology
2004
The goal of the Tropospheric Ozone Assessment Report (TOAR) is to provide research community with an up-to-date scientific assessment tropospheric ozone, from surface tropopause. While a suite observations provides significant information on spatial and temporal distribution observational gaps make it necessary use global atmospheric chemistry models synthesize our understanding processes variables that control ozone abundance its variability. Models facilitate interpretation allow us...
Abstract. We present an overview of state-of-the-art chemistry–climate and chemistry transport models that are used within phase 1 the Chemistry–Climate Model Initiative (CCMI-1). The CCMI aims to conduct a detailed evaluation participating using process-oriented diagnostics derived from observations in order gain confidence models' projections stratospheric ozone layer, tropospheric composition, air quality, where applicable global climate change, interactions between them. Interpretation...
Abstract. We have analysed time-slice simulations from 17 global models, participating in the Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP), to explore changes present-day (2000) hydroxyl radical (OH) concentration methane (CH4) lifetime relative preindustrial times (1850) 1980. A comparison of modeled observation-derived methyl chloroform lifetimes suggests that multi-model mean OH is overestimated by 5 10% but within range uncertainties. The models consistently...
The published literature debates the extent to which naturally occurring stratospheric ozone intrusions reach surface and contribute exceedances of U.S. National Ambient Air Quality Standard (NAAQS) for ground‐level (75 ppbv implemented in 2008). Analysis ozonesondes, lidar, measurements over western from April June 2010 show that a global high‐resolution (∼50 × 50 km 2 ) chemistry‐climate model (GFDL AM3) captures observed layered features sharp gradients deep intrusions, representing major...
From the earliest observations of ozone in lower atmosphere 19th century, both measurement methods and portion globe observed have evolved changed. These different uncertainties biases, data records differ with respect to coverage (space time), information content, representativeness. In this study, various datasets are reviewed selected for inclusion historical record background levels, based on relationship technique modern UV absorption standard, absence interfering pollutants,...
Many prior studies clearly document episodic Asian pollution in the western U.S. free troposphere. Here, we examine mechanisms involved transport of plumes into surface air through an integrated analysis situ and satellite measurements May–June 2010 with a new global high‐resolution (∼50 × 50 km 2 ) chemistry‐climate model (GFDL AM3). We find that AM3 full stratosphere‐troposphere chemistry nudged to reanalysis winds successfully reproduces observed sharp ozone gradients above California,...
Abstract. US surface O3 responds to varying global-to-regional precursor emissions, climate, and extreme weather, with implications for designing effective air quality control policies. We examine these conjoined processes observations global chemistry-climate model (GFDL-AM3) hindcasts over 1980–2014. The captures the salient features of observed trends in daily maximum 8 h average O3: (1) increases East Asia (up 2 ppb yr−1), (2) springtime at western (WUS) rural sites (0.2–0.5 yr−1) a...
Abstract Evidence suggests deep stratospheric intrusions can elevate western US surface ozone to unhealthy levels during spring. These be classified as ‘exceptional events’, which are not counted towards non-attainment determinations. Understanding the factors driving year-to-year variability of these is thus relevant for effective implementation air quality standard. Here we use observations and model simulations link events modes climate variability. We show more frequent late spring when...
Abstract. Tropospheric ozone (O3) is a trace gas playing important roles in atmospheric chemistry, air quality and climate change. In contrast to North America Europe, long-term measurements of surface O3 are very limited China. We compile available observations at Mt. Tai – the highest mountain over China Plain during 2003–2015 analyze decadal change its sources. A linear regression analysis shows that summertime measured has increased significantly by 1.7 ppbv yr−1 for June 2.1 July–August...
Satellite data of atmospheric pollutants are becoming more widely used in the decision-making and environmental management activities public, private sector non-profit organizations. They employed for estimating emissions, tracking pollutant plumes, supporting air quality forecasting activities, providing evidence "exceptional event" declarations, monitoring regional long-term trends, evaluating model output. However, many managers not taking full advantage these applications nor has...
Our understanding of the processes that control burden and budget tropospheric ozone has changed dramatically over last 60 years. Models are key tools used to understand these changes, underscore there many important in controlling budget. In this critical review, we assess our evolving processes, both physical chemical. We review model simulations from International Global Atmospheric Chemistry Climate Model Intercomparison Project Modelling Initiative changes its 1850 2010. Analysis data...
Ozone (O3) is a key air pollutant that produced from precursor emissions and has adverse impacts on human health ecosystems. In the U.S., Clean Air Act (CAA) regulates O3 levels to protect public welfare, but unraveling origins of surface complicated by presence contributions multiple sources including background like stratospheric transport, wildfies, biogenic precursors, international anthropogenic pollution, in addition U.S. sources. this report, we consider more than 100 published...
Abstract. >We analyse simulations performed for the Chemistry-Climate Model Initiative (CCMI) to estimate return dates of stratospheric ozone layer from depletion caused by anthropogenic chlorine and bromine. We consider a total 155 20 models, including range sensitivity studies which examine impact climate change on recovery. For control (unconstrained nudging towards analysed meteorology) there is large spread (±20 DU in global average) predictions absolute column. Therefore, model...
Abstract We describe the baseline model configuration and simulation characteristics of Geophysical Fluid Dynamics Laboratory (GFDL)'s Atmosphere Model version 4.1 (AM4.1), which builds on developments at GFDL over 2013–2018 for coupled carbon‐chemistry‐climate as part sixth phase Coupled Intercomparison Project. In contrast with GFDL's AM4.0 development effort, focused physical aerosol interactions is used atmospheric component CM4.0, AM4.1 focuses comprehensiveness Earth system...
SignificanceRecord-setting fires in the western United States over last decade caused severe air pollution, loss of human life, and property damage. Enhanced drought increased biomass a warmer climate may fuel larger more frequent wildfires coming decades. Applying an empirical statistical model to projected by Earth System Models including climate-ecosystem-socioeconomic interactions, we show that fine particulate pollution US Pacific Northwest could double triple during late summer fall...
Abstract. We update and evaluate the treatment of nitrate aerosols in Geophysical Fluid Dynamics Laboratory (GFDL) atmospheric model (AM3). Accounting for radiative effects generally improves simulated aerosol optical depth, although concentrations at surface are biased high. This bias can be reduced by increasing deposition to account near-surface volatilization ammonium or neglecting heterogeneous production nitric acid inhibition N2O5 reactive uptake high concentrations. Globally,...
We present a 20 year time series of in situ free tropospheric ozone observations above western North America during springtime and interpret results using hindcast simulations (1980–2014) conducted with the Geophysical Fluid Dynamics Laboratory global chemistry-climate model (GFDL AM3). Revisiting analysis Cooper et al. (2010), we show that sampling biases can substantially influence calculated trends. AM3 cosampled space reproduces observed trend (0.65 ± 0.32 ppbv yr−1) over 1995–2008 (in...
Estimates of ground-level ozone concentrations are necessary to determine the human health burden ozone. To support Global Burden Disease Study, we produce yearly fine resolution global surface estimates from 1990 2017 through a data fusion observations and models. As sparse in many populated regions, use novel combination M3Fusion Bayesian Maximum Entropy (BME) methods. With M3Fusion, create multimodel composite by bias-correcting weighting nine atmospheric chemistry models based on their...
Abstract. Understanding the exchange processes between atmospheric boundary layer and free troposphere is crucial for estimating hemispheric transport of air pollution. Most studies pollution have taken a large-scale perspective using global chemical models with fairly coarse spatial temporal resolutions. In support United Nations Task Force on Hemispheric Transport Air Pollution (TF HTAP; www.htap.org), this study employs two high-resolution chemistry (WRF-Chem CMAQ; 36×36 km) driven...
Abstract. Inter-annual variability and long-term trends in tropospheric ozone are both environmental climate concerns. Ozone measured at Mt Waliguan Observatory (WLG, 3816 m a.s.l.) on the Tibetan Plateau over period of 1994–2013 has increased significantly by 0.2–0.3 ppbv yr−1 during spring autumn but shows a much smaller trend winter no significant summer. Here we explore factors driving observed changes WLG using backward trajectory analysis, chemistry–climate model hindcast simulations...
Ambient air pollution from ozone and fine particulate matter is associated with premature mortality. As emissions one continent influence quality over others, changes in can also human health on other continents. We estimate global pollution-related mortality exposure to PM2.5 ozone, the avoided deaths 20% anthropogenic emission reductions six source regions, North America (NAM), Europe (EUR), South Asia (SAS), East (EAS), Russia/Belarus/Ukraine (RBU) Middle (MDE), three sectors, Power...