Alan Fried
Biographic Data
| ID | 9036312 |
|---|---|
| NAME | Alan Fried |
| GIVEN NAMES | Alan |
| FAMILY NAME | Fried |
| SIGNATURE | FRIED A |
| AFFILIATIONS | Victorian Institute of Earth and Planetary Sciences, Department of Geography and Environmental Science, Monash University, Clayton, VIC 3168, Australia, Honorary Research Associate, University of Sydney, PO Box 2, SiSatchanalai, Sukhothai Province 64130, Thailand, Palaeoecology Centre, The Queen's University, Belfast BT7 1NN, Northern Ireland |
| VERIFIED | No |
| TOTAL WORKS | 10 |
| TOTAL CITATIONS | 2 |
| AUTHOR COUNT | 10 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1992 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
Ozone production characteristics during the Korea-United States Air Quality campaign over the Seoul Metropolitan Area deciphered by observationally constrained hydroxyl radical reactivity
Despite notable reductions in precursor emissions, ambient ozone levels continue to increase in many urban areas, including Seoul, South Korea. This study examines the photochemical ozone production process in the Seoul Metropolitan Area using observational data from the Korea-United States Air Quality (KORUS-AQ) airborne campaign. By analyzing hydroxyl radical reactivity linked to nitrogen oxides (NOX) and volatile organic compounds (VOCs) (RNOx…
Evaluation of the emission inventory for large point emission sources in South Korea by applying measured data from the Nasa/Nier Korus-AQ aircraft field campaign
One of the major issues in determining a region’s air quality is the uncertainty of large point sources (LPSs) emissions, which significantly affect the local-regional air quality. In this study, the SO2 and NOx emissions of 5 major LPSs in South Korea were evaluated by comparing the emissions-based concentrations employing a Gaussian dispersion model with aircraft-based measurements from DC-8 “around-the-stack” flights through the National Aeron…
Observed versus simulated OH reactivity during Korus-AQ campaign
We present a holistic examination of tropospheric OH reactivity (OHR) in South Korea using comprehensive NASA DC-8 airborne measurements collected during the Korea–United States Air Quality field study and chemical transport models. The observed total OHR (tOHR) averaged in the planetary boundary layer (PBL, <2.0 km) and free troposphere was 5.2 s−1 and 2.0 s−1 during the campaign, respectively. These values were higher than the calculated OHR (c…
Evolution of formaldehyde (HCHO) in a plume originating from a petrochemical industry and its volatile organic compounds (VOCs) emission rate estimation
Large industrial facilities, such as petrochemical complexes, have decisive effects on regional air quality: directly due to their own hazardous volatile organic compounds (VOCs) emissions and indirectly due to their contribution to secondary air pollution. In South Korea, pronounced ozone and particulate matter issues have been reported in industrial areas. In this study, we develop a new top-down VOC emission rate estimation method using in sit…
Top-down estimates of anthropogenic VOC emissions in South Korea using formaldehyde vertical column densities from aircraft during the Korus-AQ campaign
Nonmethane volatile organic compounds (NMVOCs) result in ozone and aerosol production that adversely affects the environment and human health. For modeling purposes, anthropogenic NMVOC emissions have been typically compiled using the “bottom-up” approach. To minimize uncertainties of the bottom-up emission inventory, “top-down” NMVOC emissions can be estimated using formaldehyde (HCHO) observations. In this study, HCHO vertical column densities …
Airborne formaldehyde and volatile organic compound measurements over the Daesan petrochemical complex on Korea’s northwest coast during the Korea-United States Air Quality study
The U.S. National Aeronautics and Space Administration in partnership with Korea’s National Institute of Environmental Research embarked on the Korea-United States Air Quality (KORUS-AQ) study to address air quality issues over the Korean peninsula. Underestimation of volatile organic compound (VOC) emissions from various large facilities on South Korea’s northwest coast may contribute to this problem, and this study focuses on quantifying top-do…
Characterization, sources and reactivity of volatile organic compounds (VOCs) in Seoul and surrounding regions during Korus-AQ
The Korea-United States Air Quality Study (KORUS-AQ) took place in spring 2016 to better understand air pollution in Korea. In support of KORUS-AQ, 2554 whole air samples (WAS) were collected aboard the NASA DC-8 research aircraft and analyzed for 82 C1–C10 volatile organic compounds (VOCs) using multi-column gas chromatography. Together with fast-response measurements from other groups, the air samples were used to characterize the VOC compositi…
Observation-based modeling of ozone chemistry in the Seoul metropolitan area during the Korea-United States Air Quality Study (Korus-AQ)
The Seoul Metropolitan Area (SMA) has a population of 24 million and frequently experiences unhealthy levels of ozone (O3). In this work, measurements taken during the Korea-United States Air Quality Study (KORUS-AQ, 2016) are used to explore regional gradients in O3 and its chemical precursors, and an observationally-constrained 0-D photochemical box model is used to quantify key aspects of O3 production including its sensitivity to precursor ga…
Evaluation of simulated O3 production efficiency during the Korus-AQ campaign
We examine O3 production and its sensitivity to precursor gases and boundary layer mixing in Korea by using a 3-D global chemistry transport model and extensive observations during the KORea-US cooperative Air Quality field study in Korea, which occurred in May–June 2016. During the campaign, observed aromatic species onboard the NASA DC-8 aircraft, especially toluene, showed high mixing ratios of up to 10 ppbv, emphasizing the importance of arom…
River Bank Erosion and the Decline of the Sisatchanalai Ceramics Industry of North Central Thailand
The famous SiSatchanalai ceramics industry of north central Thailand operated from the tenth or eleventh century AD until the sixteenth century. The reasons for the decline of the industry have not yet been fully clarified and have focused on social and economic factors. Evidence is presented from Ban Ko Noi, based on stratigraphy, radiocarbon dating, pollen, and the character of the kilns and associated ceramics. This evidence demonstrates that …
River Bank Erosion and the Decline of the Sisatchanalai Ceramics Industry of North Central Thailand
The famous SiSatchanalai ceramics industry of north central Thailand operated from the tenth or eleventh century AD until the sixteenth century. The reasons for the decline of the industry have not yet been fully clarified and have focused on social and economic factors. Evidence is presented from Ban Ko Noi, based on stratigraphy, radiocarbon dating, pollen, and the character of the kilns and associated ceramics. This evidence demonstrates that …
River Bank Erosion and the Decline of the Sisatchanalai Ceramics Industry of North Central Thailand
The famous SiSatchanalai ceramics industry of north central Thailand operated from the tenth or eleventh century AD until the sixteenth century. The reasons for the decline of the industry have not yet been fully clarified and have focused on social and economic factors. Evidence is presented from Ban Ko Noi, based on stratigraphy, radiocarbon dating, pollen, and the character of the kilns and associated ceramics. This evidence demonstrates that …
Evaluation of simulated O3 production efficiency during the Korus-AQ campaign
We examine O3 production and its sensitivity to precursor gases and boundary layer mixing in Korea by using a 3-D global chemistry transport model and extensive observations during the KORea-US cooperative Air Quality field study in Korea, which occurred in May–June 2016. During the campaign, observed aromatic species onboard the NASA DC-8 aircraft, especially toluene, showed high mixing ratios of up to 10 ppbv, emphasizing the importance of arom…
Airborne formaldehyde and volatile organic compound measurements over the Daesan petrochemical complex on Korea’s northwest coast during the Korea-United States Air Quality study
The U.S. National Aeronautics and Space Administration in partnership with Korea’s National Institute of Environmental Research embarked on the Korea-United States Air Quality (KORUS-AQ) study to address air quality issues over the Korean peninsula. Underestimation of volatile organic compound (VOC) emissions from various large facilities on South Korea’s northwest coast may contribute to this problem, and this study focuses on quantifying top-do…
Characterization, sources and reactivity of volatile organic compounds (VOCs) in Seoul and surrounding regions during Korus-AQ
The Korea-United States Air Quality Study (KORUS-AQ) took place in spring 2016 to better understand air pollution in Korea. In support of KORUS-AQ, 2554 whole air samples (WAS) were collected aboard the NASA DC-8 research aircraft and analyzed for 82 C1–C10 volatile organic compounds (VOCs) using multi-column gas chromatography. Together with fast-response measurements from other groups, the air samples were used to characterize the VOC compositi…
Observation-based modeling of ozone chemistry in the Seoul metropolitan area during the Korea-United States Air Quality Study (Korus-AQ)
The Seoul Metropolitan Area (SMA) has a population of 24 million and frequently experiences unhealthy levels of ozone (O3). In this work, measurements taken during the Korea-United States Air Quality Study (KORUS-AQ, 2016) are used to explore regional gradients in O3 and its chemical precursors, and an observationally-constrained 0-D photochemical box model is used to quantify key aspects of O3 production including its sensitivity to precursor ga…
Evolution of formaldehyde (HCHO) in a plume originating from a petrochemical industry and its volatile organic compounds (VOCs) emission rate estimation
Large industrial facilities, such as petrochemical complexes, have decisive effects on regional air quality: directly due to their own hazardous volatile organic compounds (VOCs) emissions and indirectly due to their contribution to secondary air pollution. In South Korea, pronounced ozone and particulate matter issues have been reported in industrial areas. In this study, we develop a new top-down VOC emission rate estimation method using in sit…
Top-down estimates of anthropogenic VOC emissions in South Korea using formaldehyde vertical column densities from aircraft during the Korus-AQ campaign
Nonmethane volatile organic compounds (NMVOCs) result in ozone and aerosol production that adversely affects the environment and human health. For modeling purposes, anthropogenic NMVOC emissions have been typically compiled using the “bottom-up” approach. To minimize uncertainties of the bottom-up emission inventory, “top-down” NMVOC emissions can be estimated using formaldehyde (HCHO) observations. In this study, HCHO vertical column densities …
Observed versus simulated OH reactivity during Korus-AQ campaign
We present a holistic examination of tropospheric OH reactivity (OHR) in South Korea using comprehensive NASA DC-8 airborne measurements collected during the Korea–United States Air Quality field study and chemical transport models. The observed total OHR (tOHR) averaged in the planetary boundary layer (PBL, <2.0 km) and free troposphere was 5.2 s−1 and 2.0 s−1 during the campaign, respectively. These values were higher than the calculated OHR (c…
Evaluation of the emission inventory for large point emission sources in South Korea by applying measured data from the Nasa/Nier Korus-AQ aircraft field campaign
One of the major issues in determining a region’s air quality is the uncertainty of large point sources (LPSs) emissions, which significantly affect the local-regional air quality. In this study, the SO2 and NOx emissions of 5 major LPSs in South Korea were evaluated by comparing the emissions-based concentrations employing a Gaussian dispersion model with aircraft-based measurements from DC-8 “around-the-stack” flights through the National Aeron…
Ozone production characteristics during the Korea-United States Air Quality campaign over the Seoul Metropolitan Area deciphered by observationally constrained hydroxyl radical reactivity
Despite notable reductions in precursor emissions, ambient ozone levels continue to increase in many urban areas, including Seoul, South Korea. This study examines the photochemical ozone production process in the Seoul Metropolitan Area using observational data from the Korea-United States Air Quality (KORUS-AQ) airborne campaign. By analyzing hydroxyl radical reactivity linked to nitrogen oxides (NOX) and volatile organic compounds (VOCs) (RNOx…
Air Quality and Health Impacts (9 works) · Air quality index (9 works) · Atmospheric chemistry and aerosols (9 works) · Chemistry (8 works) · Meteorology (8 works) · Environmental Science (7 works) · Atmospheric sciences (6 works) · Ozone (6 works) · Geography (5 works) · Emission inventory (4 works)