A5081205039- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Air Quality and Health Impacts
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Vehicle emissions and performance
- Hydrology and Watershed Management Studies
- Remote Sensing in Agriculture
- 3D Modeling in Geospatial Applications
- Catalytic Processes in Materials Science
- Toxic Organic Pollutants Impact
- Rangeland Management and Livestock Ecology
- Agriculture and Rural Development Research
- Precipitation Measurement and Analysis
- Maritime Ports and Logistics
- Plant Water Relations and Carbon Dynamics
- Land Use and Ecosystem Services
- Radio Wave Propagation Studies
University of North Carolina at Chapel Hill
2020-2021
North Carolina State University
2013-2020
Universidad Nacional Autónoma de México
2020
Research Triangle Park Foundation
2017-2019
Environmental Protection Agency
2017-2019
Abstract The Weather Research and Forecasting Model with Aerosol–Cloud Interactions (WRF-ACI) is developed for studying aerosol effects on gridscale subgrid-scale clouds using common activation ice nucleation formulations double-moment cloud microphysics in a scale-aware parameterization scheme. Comparisons of both the standard WRF WRF-ACI models’ results summer season against satellite reanalysis estimates show that system improves simulation liquid water paths. Correlation coefficients...
Abstract. Land use and land cover change (LULCC) impacts local regional climates through various biogeophysical processes. Accurate representation of surface parameters in models (LSMs) is essential to accurately predict these LULCC-induced climate signals. In this work, we test the applicability default Noah, Noah-MP, Community Model (CLM) LSMs Weather Research Forecasting (WRF) model over Sub-Saharan Africa. We find that WRF do not represent albedo, leaf area index, roughness region due...
Abstract. The Weather Research and Forecasting model with Chemistry (WRF/Chem) v3.6.1 the Carbon Bond 2005 (CB05) gas-phase mechanism is evaluated for its first decadal application during 2001–2010 using Representative Concentration Pathway 8.5 (RCP 8.5) emissions to assess capability appropriateness long-term climatological simulations. initial boundary conditions are downscaled from modified Community Earth System Model/Community Atmosphere Model (CESM/CAM5) v1.2.2. meteorological...
Abstract. Air quality and climate influence each other through the uncertain processes of aerosol formation cloud droplet activation. In this study, both are improved in Weather, Research Forecasting model with Chemistry (WRF/Chem) version 3.7.1. The existing Volatility Basis Set (VBS) treatments for organic (OA) WRF/Chem by considering following: secondary OA (SOA) from semi-volatile primary (POA), a semi-empirical formulation enthalpy vaporization SOA, functionalization fragmentation...
Nudging (data assimilation) is used in many regional integrated meteorology-air quality models to reduce biases simulated climatology. However, such modeling systems, temperature changes due nudging could compete with induced by radiatively active and hygroscopic short-lived tracers leading two interesting dilemmas: when continuously applied, what are the relative sizes of these radiative forces at local scales? How do present free atmosphere differ from those surface? This work studies...
Abstract. Intercontinental transport of atmospheric pollution (ITAP) can offset the impact local emission control efforts, human and ecosystem health, play a role in climate forcing. This study aims to determine ITAP caused by East Asian anthropogenic emissions (EAAEs) under current future scenarios. The contribution from EAAEs is determined using "brute force method" which results simulations with without are compared. Asia enhanced due faster wind speeds aloft stronger low pressure center...
Abstract New treatments for organic aerosol (OA) formation have been added to a modified version of the CESM/CAM5 model (CESM‐NCSU). These include volatility basis set treatment simulation primary and secondary aerosols (SOAs), simplified from glyoxal, parameterization representing impact new particle (NPF) gases sulfuric acid. With inclusion these treatments, concentration oxygenated increases by 0.33 µg m −3 that (POA) decreases 0.22 on global average. The decrease in POA leads reduction...
Abstract. Atmospheric chemistry plays a key role in determining the amounts and distributions of oxidants gaseous precursors that control formation secondary aerosol pollutants; all those species can interact with climate system. To understand impacts different gas-phase mechanisms on global air quality predictions, this work, comprehensive comparative evaluation is performed using Community Atmosphere Model (CAM) Version 5 tropospheric stratospheric (CAM5-chem) within Earth System (CESM)...
To realistically simulate the impacts of marine isoprene and primary organic aerosols (POA) on atmospheric chemistry, a unified model framework with online emissions, comprehensive treatment gas-phase advanced aerosol microphysics is required. In this work, global-through-urban WRF/Chem (GU-WRF/Chem) implemented emissions size-resolved POA applied to examine such impacts. The net effect these was increased surface concentrations decreased surfaced hydroxyl radical ozone over most regions....
Abstract. Land use and land cover change (LULCC) impacts local regional climates through various biogeophysical processes. Accurate representation of surface parameters in models (LSMs) is essential to accurately predict these LULCC-induced climate signals. In this work, we test the applicability default Noah, Noah-MP, CLM LSMs Weather Research Forecasting Model (WRF) over Sub-Saharan Africa. We find that WRF do not represent albedo, leaf area index, roughness region due flawed assumptions,...
Abstract. Air quality and climate influence each other through the uncertain processes of aerosol formation cloud droplet activation. In this study, both are improved in Weather, Research Forecasting model with Chemistry (WRF/Chem) version 3.7.1. The existing Volatility Basis Set (VBS) treatments for organic (OA) WRF/Chem is by considering secondary OA (SOA) from semi-volatile primary (POA), a semi-empirical formulation enthalpy vaporization SOA, as well functionalization fragmentation...
Abstract. The Weather Research and Forecasting model with Chemistry (WRF/Chem) v3.6.1 the Carbon Bond 2005 (CB05) gas-phase mechanism is evaluated for its first decadal application during 2001–2010 using Representative Concentration Pathway (RCP 8.5) emissions to assess capability appropriateness long-term climatological simulations. initial boundary conditions are downscaled from modified Community Earth System Model/Community Atmosphere Model (CESM/CAM5) v1.2.2. meteorological...
Abstract. Intercontinental transport of atmospheric pollution (ITAP) can offset the impact local emission control efforts, human and ecosystem health, play a role in climate forcing. This study aims to determine ITAP caused by East Asian anthropogenic emissions (EAAEs) under current future scenarios. from Asia is enhanced due faster wind speeds aloft stronger low pressure center over Eastern Russia that facilitate westerly export free troposphere southerly near surface, increased gaseous...
Abstract The Weather Research and Forecasting Model with Aerosol–Cloud Interactions (WRF-ACI) configuration is used to investigate the scale dependency of aerosol–cloud interactions (ACI) across “gray zone” scales for grid-scale subgrid-scale clouds. impacts ACI on weather are examined regions in eastern western United States at 36, 12, 4, 1 km grid spacing short-term periods during summer 2006. determined by comparing simulations current climatological aerosol levels reduced 90%. lifetime...
Abstract. Atmospheric chemistry plays a key role in determining the amounts and distributions of oxidants gaseous precursors that control formation secondary aerosol pollutants; all those species can interact with climate system. To understand impacts different gas-phase mechanisms on global air quality predictions, this work, comprehensive comparative evaluation is performed using Community Atmosphere Model (CAM) Version 5 tropospheric stratospheric (CAM5-chem) within Earth System (CESM)...