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Jung-Hun Woo
Department of Civil and Environmental Engineering, Konkuk University, Seoul 05029, Korea

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Journal article
Published: 08 April 2021 in Atmosphere
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We report the results of year-long PM2.5 (particulate matter less than 2.5 µm in diameter) simulations over Northeast Asia for the base year of 2013 under the framework of the Long-range Transboundary Air Pollutants in Northeast Asia (LTP) project. LTP is a tripartite project launched by China, Japan, and Korea for cooperative monitoring and modeling of the long-range transport (LRT) of air pollutants. In the modeling aspect in the LTP project, each country’s modeling group employs its own original air quality model and options. The three regional air quality models employed by the modeling groups are WRF-CAMx, NHM-RAQM2, and WRF-CMAQ. PM2.5 concentrations were simulated in remote exit-and-entrance areas associated with the LRT process over China, Japan, and Korea. The results showed apparent bias that remains unexplored due to a series of uncertainties from emission estimates and inherent model limitations. The simulated PM10 levels at seven remote exit-and-entrance sites were underestimated with the normalized mean bias of 0.4 ± 0.2. Among the four chemical components of PM2.5 (SO4 2−, NO3 −, organic carbon (OC), and elemental carbon (EC)), the largest inter-model variability was in OC, with the second largest discrepancy in NO3 −. Our simulation results also indicated that under considerable SO4 2− levels, favorable environments for ammonium nitrate formation were found in exit-and-entrance areas between China and Korea, and gas-aerosol partitioning for semi-volatile species of ammonium nitrate could be fully achieved prior to arrival at the entrance areas. Other chemical characteristics, including NO3 −/SO4 2− and OC/EC ratios, are discussed to diagnose the LRT characteristics of PM2.5 in exit-and-entrance areas associated with transboundary transport over China, Japan, and Korea.

ACS Style

Cheol-Hee Kim; Fan Meng; Mizuo Kajino; Jaehyun Lim; Wei Tang; Jong-Jae Lee; Yusuke Kiriyama; Jung-Hun Woo; Keiichi Sato; Toshihiro Kitada; Hiroaki Minoura; Jiyoung Kim; Kyoung-Bin Lee; Soona Roh; Hyun-Young Jo; Yu-Jin Jo. Comparative Numerical Study of PM2.5 in Exit-and-Entrance Areas Associated with Transboundary Transport over China, Japan, and Korea. Atmosphere 2021, 12, 469 .

AMA Style

Cheol-Hee Kim, Fan Meng, Mizuo Kajino, Jaehyun Lim, Wei Tang, Jong-Jae Lee, Yusuke Kiriyama, Jung-Hun Woo, Keiichi Sato, Toshihiro Kitada, Hiroaki Minoura, Jiyoung Kim, Kyoung-Bin Lee, Soona Roh, Hyun-Young Jo, Yu-Jin Jo. Comparative Numerical Study of PM2.5 in Exit-and-Entrance Areas Associated with Transboundary Transport over China, Japan, and Korea. Atmosphere. 2021; 12 (4):469.

Chicago/Turabian Style

Cheol-Hee Kim; Fan Meng; Mizuo Kajino; Jaehyun Lim; Wei Tang; Jong-Jae Lee; Yusuke Kiriyama; Jung-Hun Woo; Keiichi Sato; Toshihiro Kitada; Hiroaki Minoura; Jiyoung Kim; Kyoung-Bin Lee; Soona Roh; Hyun-Young Jo; Yu-Jin Jo. 2021. "Comparative Numerical Study of PM2.5 in Exit-and-Entrance Areas Associated with Transboundary Transport over China, Japan, and Korea." Atmosphere 12, no. 4: 469.

Concept paper
Published: 24 September 2020 in Sustainability
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A bottom-up emissions inventory is one of the most important data sets needed to understand air quality (AQ) and climate change (CC). Several emission inventories have been developed for Asia, including Transport and Chemical Evolution over the Pacific (TRACE-P), Regional Emission Inventory in Asia (REAS), and Inter-Continental Chemical Transport Experiment (INTEX) and, while these have been used successfully for many international studies, they have limitations including restricted amounts of information on pollutant types and low levels of transparency with respect to the polluting sectors or fuel types involved. To address these shortcomings, we developed: 1) a base-year, bottom-up anthropogenic emissions inventory for Asia, using the most current parameters and international frameworks (i.e., the Greenhouse gas—Air pollution INteractions and Synergies (GAINS) model); and 2) a base-year, natural emissions inventory for biogenic and biomass burning. For 1), we focused mainly on China, South Korea, and Japan; however, we also covered emission inventories for other regions in Asia using data covering recent energy/industry statistics, emission factors, and control technology penetration. The emissions inventory (Comprehensive Regional Emissions inventory for Atmospheric Transport Experiment (CREATE)) covers 54 fuel classes, 201 subsectors, and 13 pollutants, namely SO2, NOx, CO, non-methane volatile organic compounds (NMVOC), NH3, OC, BC, PM10, PM2.5, CO2, CH4, N2O, and Hg. For the base-year natural emissions inventory, the Model of Emissions of Gases and Aerosols from Nature (MEGAN) and BlueSky-Asia frameworks were used to estimate biogenic and biomass burning emissions, respectively. Since the CREATE emission inventory was designed/developed using international climate change/air quality (CC/AQ) assessment frameworks, such as GAINS, and has been fully connected with the most comprehensive emissions modeling systems—such as the US Environmental Protection Agency (EPA) Chemical Manufacturing Area Source (CMAS) system—it can be used to support various climate and AQ integrated modeling studies, both now and in the future.

ACS Style

Jung-Hun Woo; Younha Kim; Hyeon-Kook Kim; Ki-Chul Choi; Jeong-Hee Eum; Jae-Bum Lee; Jae-Hyun Lim; Jiyoung Kim; Miae Seong. Development of the CREATE Inventory in Support of Integrated Climate and Air Quality Modeling for Asia. Sustainability 2020, 12, 7930 .

AMA Style

Jung-Hun Woo, Younha Kim, Hyeon-Kook Kim, Ki-Chul Choi, Jeong-Hee Eum, Jae-Bum Lee, Jae-Hyun Lim, Jiyoung Kim, Miae Seong. Development of the CREATE Inventory in Support of Integrated Climate and Air Quality Modeling for Asia. Sustainability. 2020; 12 (19):7930.

Chicago/Turabian Style

Jung-Hun Woo; Younha Kim; Hyeon-Kook Kim; Ki-Chul Choi; Jeong-Hee Eum; Jae-Bum Lee; Jae-Hyun Lim; Jiyoung Kim; Miae Seong. 2020. "Development of the CREATE Inventory in Support of Integrated Climate and Air Quality Modeling for Asia." Sustainability 12, no. 19: 7930.

Journal article
Published: 30 July 2020 in Atmosphere
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Biogenic volatile organic compound (BVOCs) emissions are the largest VOC emission source globally, and are precursors to ozone and secondary organic aerosols, both of which are strong, short-lived climate pollutants. BVOC emissions are usually estimated using the Model of Emissions of Gases and Aerosols from Nature (MEGAN), which requires Plant Functional Types (PFTs) and Leaf Area Indexes (LAIs) as inputs. Herein, the effects of refined input data on regional BVOC emission estimates are analyzed. For LAIs, lower resolution MODerate-resolution Imaging Spectroradiometer (MODIS), and higher spatio-temporal resolution Spatial and Temporal Adaptive Reflectance Fusion Model (STARFM) LAI were generated. For PFTs, local land cover maps were developed, in addition to MODIS PFT. In South Korea, annual emissions of isoprene and monoterpenes in 2015 were estimated as 384 and 160 Gg/year, respectively, using STARFM LAI and Local PFT (Case 4). For North Korea, 340 Gg/year isoprene and 72 Gg/year monoterpenes emissions were estimated using STARFM LAI and MODIS PFT. These estimates were 14–110% higher than when using MODIS LAI and MODIS PFT (Case 1). Inter-comparison with satellite-based inverse isoprene emission estimates from GlobEmission shows 32% (North Korea) to 34% (South Korea) overestimation in bottom-up data. Our new vegetation inputs improve MEGAN performance and resulting BVOC emission estimations. Performance of Weather Research and Forecasting (WRF) meteorological modeling requires improvement, especially for solar radiation, to avoid overestimation of isoprene emissions.

ACS Style

Youjung Jang; Yangdam Eo; Meongdo Jang; Jung-Hun Woo; Younha Kim; Jae-Bum Lee; Jae-Hyun Lim. Impact of Land Cover and Leaf Area Index on BVOC Emissions over the Korean Peninsula. Atmosphere 2020, 11, 806 .

AMA Style

Youjung Jang, Yangdam Eo, Meongdo Jang, Jung-Hun Woo, Younha Kim, Jae-Bum Lee, Jae-Hyun Lim. Impact of Land Cover and Leaf Area Index on BVOC Emissions over the Korean Peninsula. Atmosphere. 2020; 11 (8):806.

Chicago/Turabian Style

Youjung Jang; Yangdam Eo; Meongdo Jang; Jung-Hun Woo; Younha Kim; Jae-Bum Lee; Jae-Hyun Lim. 2020. "Impact of Land Cover and Leaf Area Index on BVOC Emissions over the Korean Peninsula." Atmosphere 11, no. 8: 806.

Original article
Published: 13 June 2019 in Asia-Pacific Journal of Atmospheric Sciences
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The emission of pollution from Chinese point sources, and its migration to Korea, downwind of China, is an important issue in terms of Korean air quality management. Therefore, this study intended to improve the Asian Emission Inventory, NIER/KU-CREATE, by improving information about the point source emissions, their location, and discharge conditions, in China. By using the Global dataset, we can establish point source location information for Coal Power Plants and Non-Coal Power Plants in the Chinese power sector, and calculate and allocate emissions in the inventory. In addition, the emission inventory of NH3, as a by-product of NOx abatement processing, was regarded as being insufficiently characterized in the previous emission inventory, and has been re-estimated. As a result, 3798 LPSs in China were identified, and NH3 emissions from those power plants have increased significantly. In addition, the vertical distribution of emissions through the allocation stack height parameters showed atmospheric injection heights of between 250 m and 1000 m. Using this information, HY-SPLIT trajectory modeling found that during periods of active westerly from China to Korea, emissions from the higher injection height were more prone to move towards Korea, than those from the lower height.

ACS Style

Youjung Jang; Yungu Lee; Jinseok Kim; Younha Kim; Jung-Hun Woo. Improvement China Point Source for Improving Bottom-Up Emission Inventory. Asia-Pacific Journal of Atmospheric Sciences 2019, 56, 107 -118.

AMA Style

Youjung Jang, Yungu Lee, Jinseok Kim, Younha Kim, Jung-Hun Woo. Improvement China Point Source for Improving Bottom-Up Emission Inventory. Asia-Pacific Journal of Atmospheric Sciences. 2019; 56 (1):107-118.

Chicago/Turabian Style

Youjung Jang; Yungu Lee; Jinseok Kim; Younha Kim; Jung-Hun Woo. 2019. "Improvement China Point Source for Improving Bottom-Up Emission Inventory." Asia-Pacific Journal of Atmospheric Sciences 56, no. 1: 107-118.

Journal article
Published: 22 January 2019 in Applied Energy
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In this paper we forecast energy demand at the local level using a new two-dimensional downscaling methodology that respects regional and subnational variation and, as well as consistency at the aggregate level. This methodology combines the one-dimensional statistical downscaling and the Iterative Proportional Fitting (IPF) procedure. Previous projection studies based on downscaling methods have focused on allocating one-dimensional quantity indicators such as GDP, population, and emissions, into geographically or administratively lower levels. In case of energy demand projections, however, downscaling involves not only regional allocation of energy demand quantities but also energy mixes of the demands in the regions. Our novel two-dimensional downscaling methodology allows us to downscale national energy projections in both demand quantities and their energy mix to regional levels by combining the statistical downscaling and the IPF procedure. We illustrate the methodology by deriving energy demand projections for provinces and metropolitan cities in Korea from national scenarios. In addition, we provide two more simple applications of the IPF to show utilization potentials of the IPF in energy demand forecasting and statistics.

ACS Style

Young-Hwan Ahn; Jung-Hun Woo; Fabian Wagner; Seung Jick Yoo. Downscaled energy demand projection at the local level using the Iterative Proportional Fitting procedure. Applied Energy 2019, 238, 384 -400.

AMA Style

Young-Hwan Ahn, Jung-Hun Woo, Fabian Wagner, Seung Jick Yoo. Downscaled energy demand projection at the local level using the Iterative Proportional Fitting procedure. Applied Energy. 2019; 238 ():384-400.

Chicago/Turabian Style

Young-Hwan Ahn; Jung-Hun Woo; Fabian Wagner; Seung Jick Yoo. 2019. "Downscaled energy demand projection at the local level using the Iterative Proportional Fitting procedure." Applied Energy 238, no. : 384-400.

Article
Published: 11 July 2018 in Air Quality, Atmosphere & Health
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Understanding how ozone (O3) and fine particulate matter (PM) formation respond to the precursor concentrations in the presence of biogenic emissions (BEs) and thereby changes in health effects can be a key step to design effective air quality management plans. This is particularly true in the Seoul Metropolitan Area (SMA), where future significant controls of anthropogenic sources of O3 and PM2.5 precursors are expected. In this paper, we investigate the effects of BEs on O3 and fine PM (PM2.5) concentrations during a strong photochemical air pollution season in the SMA in Korea. O3 and PM2.5 levels are modeled with and without BEs in June 2008. Further, we perform the health impact assessments (HIA) of O3 and PM2.5 concentration changes due to BEs to seek useful implications for air quality management by utilizing the adjusted exposure concentration fields for O3 and PM2.5 with an observation fusing (OBF) method. With BEs, daily maximum 8-h average O3 (maximum 8-h O3) and secondary organic aerosol (SOA) concentrations in the SMA increase by 17 and 474%, respectively. These increments are associated with significant consumption of photochemical oxidants (Ox), such as a ~ 60% reduction in OH∙ radicals. The reduction in Ox, conversely, lowers the production of secondary inorganic aerosols (SIOAs) by 2.7%. Adjusted O3 and PM2.5 exposure metrics and the subsequent HIA reveal that large mean increments of O3, about 8.43 ppb, due to BEs are responsible for approximately 62 all-cause premature mortalities in the SMA in June. However, mean increment of PM2.5 due to BEs is approximately 0.3 μg m−3 and results in negligible impacts on the all-cause mortality. Significant correlations of O3 and mortality rates (MR) with the VOC/NOx ratios across the SMA suggest that controlling volatile organic compounds (VOCs) from anthropogenic sources can be a priority to reduce O3 levels and population health risks in the SMA. Specifically, linear relationships of log [O3] and log [MR] to log [VOC/NOx] ensure that a 10% decrease in the VOC/NOx ratios through the VOC abatements would lead to a 1.5% decrease in the O3 levels and a 4.3% decrease in the MR on average across the SMA.

ACS Style

Hyeon-Kook Kim; Chang-Keun Song; Kyung Man Han; Yang Dam Eo; Chul Han Song; Rokjin Park; Sung-Chul Hong; Sang-Kyun Kim; Jung-Hun Woo. Impact of biogenic emissions on early summer ozone and fine particulate matter exposure in the Seoul Metropolitan Area of Korea. Air Quality, Atmosphere & Health 2018, 11, 1021 -1035.

AMA Style

Hyeon-Kook Kim, Chang-Keun Song, Kyung Man Han, Yang Dam Eo, Chul Han Song, Rokjin Park, Sung-Chul Hong, Sang-Kyun Kim, Jung-Hun Woo. Impact of biogenic emissions on early summer ozone and fine particulate matter exposure in the Seoul Metropolitan Area of Korea. Air Quality, Atmosphere & Health. 2018; 11 (9):1021-1035.

Chicago/Turabian Style

Hyeon-Kook Kim; Chang-Keun Song; Kyung Man Han; Yang Dam Eo; Chul Han Song; Rokjin Park; Sung-Chul Hong; Sang-Kyun Kim; Jung-Hun Woo. 2018. "Impact of biogenic emissions on early summer ozone and fine particulate matter exposure in the Seoul Metropolitan Area of Korea." Air Quality, Atmosphere & Health 11, no. 9: 1021-1035.

Journal article
Published: 01 February 2017 in Environmental Pollution
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Enforcement of an air quality standard for PM in the Seoul metropolitan area (SMA) was enacted in 2015. From May to June of 2016, an international airborne and surface measurement campaign took place to investigate air pollution mechanisms in the SMA. The total and speciated PM concentrations since 2008 have been measured at an intensive monitoring site for the SMA operated by the National Institute of Environmental Research (NIER). To gain insight on the trends and sources of PM in the SMA in May, we analyze PM concentrations from 2009 to 2013 using the measurements and simulations from a 3-dimensional global chemical transport model, GEOS-Chem and its adjoint. The model is updated here with the latest regional emission inventory and diurnally varying NH emissions. Monthly average PM concentration measured by β-ray attenuation ranges from 28 (2010) to 45 (2013) μg/m, decreased from 2009 to 2010, and then continuously increased until 2013. The model shows good agreement with the measurements for the daily average PM concentrations (R ≥ 0.5), and reproduces 10 out of 17 measured episodes exceeding the daily air quality standard (50 μg/m). Using the GEOS-Chem adjoint model, we find that anthropogenic emissions from the Shandong region have the largest modeled influence on PM in Seoul in May. Average contributions to the high PM episodes simulated by the model are 39% from the Shandong region, 16% from the Shanghai region, 14% from the Beijing region, and 15% from South Korea. Anthropogenic SO emissions from South Korea are negligible with 90% of the total contribution originating from China. Findings from this study may guide interpretation of observations obtained in the KORUS-AQ measurement campaign.

ACS Style

Hyung-Min Lee; Rokjin Park; Daven K. Henze; Seungun Lee; Changsub Shim; Hye-Jung Shin; Kwang-Joo Moon; Jung-Hun Woo. PM2.5 source attribution for Seoul in May from 2009 to 2013 using GEOS-Chem and its adjoint model. Environmental Pollution 2017, 221, 377 -384.

AMA Style

Hyung-Min Lee, Rokjin Park, Daven K. Henze, Seungun Lee, Changsub Shim, Hye-Jung Shin, Kwang-Joo Moon, Jung-Hun Woo. PM2.5 source attribution for Seoul in May from 2009 to 2013 using GEOS-Chem and its adjoint model. Environmental Pollution. 2017; 221 ():377-384.

Chicago/Turabian Style

Hyung-Min Lee; Rokjin Park; Daven K. Henze; Seungun Lee; Changsub Shim; Hye-Jung Shin; Kwang-Joo Moon; Jung-Hun Woo. 2017. "PM2.5 source attribution for Seoul in May from 2009 to 2013 using GEOS-Chem and its adjoint model." Environmental Pollution 221, no. : 377-384.

Journal article
Published: 31 December 2016 in Journal of Climate Change Research
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We explore the impact of Chinese future air pollutant emissions on ozone air quality in Northeast Asia (NEA) and health in South-Korea using an assessment framework including ICAMS (The Integrated Climate and Air Quality Modeling System) and BenMAP (The Environmental Benefits Mapping and Analysis Program). The emissions data sets from the climate change scenarios, the Representative Concentration Pathways (RCPs) (emission scenarios, EMSO), are used to simulate ozone air quality in NEA in the current (1996∼2005, 2000s), the near future (2016∼2025, 2020s) and the distant future (2046∼2055, 2050s). Furthermore, the simulated ozone changes in the 2050s are used to analyze ozone-related premature mortality and economic cost in South-Korea. While different EMSOs are applied to the China region, fixed EMSO are used for other country regions to isolate the impacts of the Chinese emissions. Predicted ozone changes in NEA are distinctively affected by large changes in NOx emission over most of China region. Comparing the 2020s with the 2000s situation, the largest increase in mean ozone concentrations in NEA is simulated under RCP 8.5 and similarly small increases are under other RCPs. In the 2050s in NEA, the largest increase in mean ozone concentrations is simulated under RCP 6.0 and leads to the occurrence of the highest premature mortalities and economic costs in South-Korea. Whereas, the largest decrease is simulated under RCP 4.5 leads to the highest avoided premature mortality numbers and economic costs. Our results suggest that continuous reduction of NOx emissions across the China region under an assertive climate change mitigation scenario like RCP 4.5 leads to improved future ozone air quality and health benefits in the NEA countries including South-Korea.

ACS Style

Hyeon-Kook Kim; Youngsook Lyu; Jung-Hun Woo; Sung-Chul Hong; Deok-Rae Kim; Jeonghyeon Seo; Myunghwan Shin; Sang-Kyun Kim. Impact of Future Chinese Emissions on Ozone Air Quality and Human Health in Northeast Asia. Journal of Climate Change Research 2016, 7, 451 -463.

AMA Style

Hyeon-Kook Kim, Youngsook Lyu, Jung-Hun Woo, Sung-Chul Hong, Deok-Rae Kim, Jeonghyeon Seo, Myunghwan Shin, Sang-Kyun Kim. Impact of Future Chinese Emissions on Ozone Air Quality and Human Health in Northeast Asia. Journal of Climate Change Research. 2016; 7 (4):451-463.

Chicago/Turabian Style

Hyeon-Kook Kim; Youngsook Lyu; Jung-Hun Woo; Sung-Chul Hong; Deok-Rae Kim; Jeonghyeon Seo; Myunghwan Shin; Sang-Kyun Kim. 2016. "Impact of Future Chinese Emissions on Ozone Air Quality and Human Health in Northeast Asia." Journal of Climate Change Research 7, no. 4: 451-463.

Journal article
Published: 13 April 2016 in Sustainability
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Many studies have found that larger parks might be needed to counteract the Urban Heat Island effects typical in densely populated Asian megacities. However, it is not easy to establish large parks to serve as urban cool islands in Asian megacities, where little space exists for large urban neighborhood parks. Officials in these cities would rather use small areas by replacing heat-absorbing artificial land cover with natural cover. The main objective of this study was to understand the cooling effect of changes in land cover on surface and air temperatures in urban micro-scale environments for supporting sustainable green-space planning and policy in densely built-up areas. This was achieved using measurements at different heights (ground surface, 0.1 m, and 1.5 m) for five land cover types (LCTs) and modeling with the micro-scale climate model ENVI-met. At all vertical measuring points, the average temperature over the entire measurement period had the same hot-to-cold order: asphalt > soil > grass > water > forest. However, the value dramatically decreased as the measuring points became higher. The intensity of hot and cool spots showed the highest value at surface by 18.2 °C, and declined with the height, showing 4.1 °C at 0.1 m and 3.1 °C at 1.5 m. The modeling results indicated that the well-known diurnal variation in surface insolation also occurred in our small domain, among the various LCTs. Based on these findings, providing small-scale green infrastructure in densely built-up areas could be an effective way to improve urban micro-scale thermal conditions.

ACS Style

Younha Kim; Seung Man An; Jeong-Hee Eum; Jung-Hun Woo. Analysis of Thermal Environment over a Small-Scale Landscape in a Densely Built-Up Asian Megacity. Sustainability 2016, 8, 358 .

AMA Style

Younha Kim, Seung Man An, Jeong-Hee Eum, Jung-Hun Woo. Analysis of Thermal Environment over a Small-Scale Landscape in a Densely Built-Up Asian Megacity. Sustainability. 2016; 8 (4):358.

Chicago/Turabian Style

Younha Kim; Seung Man An; Jeong-Hee Eum; Jung-Hun Woo. 2016. "Analysis of Thermal Environment over a Small-Scale Landscape in a Densely Built-Up Asian Megacity." Sustainability 8, no. 4: 358.

Journals
Published: 11 February 2016 in Faraday Discussions
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South Korea has recently achieved developed country status with the second largest megacity in the world, the Seoul Metropolitan Area (SMA). This study provides insights into future changes in air quality for rapidly emerging megacities in the East Asian region. We present total OH reactivity observations in the SMA conducted at an urban Seoul site (May–June, 2015) and a suburban forest site (Sep, 2015). The total OH reactivity in an urban site during the daytime was observed at similar levels (∼15 s−1) to those previously reported from other East Asian megacity studies. Trace gas observations indicate that OH reactivity is largely accounted for by NOX (∼50%) followed by volatile organic compounds (VOCs) (∼35%). Isoprene accounts for a substantial fraction of OH reactivity among the comprehensive VOC observational dataset (25–47%). In general, observed total OH reactivity can be accounted for by the observed trace gas dataset. However, observed total OH reactivity in the suburban forest area cannot be largely accounted for (∼70%) by the trace gas measurements. The importance of biogenic VOC (BVOCs) emissions and oxidations used to evaluate the impacts of East Asian megacity outflows for the regional air quality and climate contexts are highlighted in this study.

ACS Style

Saewung Kim; Dianne Sanchez; Mark Wang; Roger Seco; Daun Jeong; Stacey Hughes; Barbara Barletta; Donald R. Blake; Jinsang Jung; Deugsoo Kim; Gangwoong Lee; Meehye Lee; Joonyoung Ahn; Sang-Deok Lee; Gangnam Cho; Min-Young Sung; Yong-Hwan Lee; Dan Bi Kim; Younha Kim; Jung-Hun Woo; Duseong Jo; Rokjin Park; Jeong-Hoo Park; You-Deog Hong; Ji-Hyung Hong. OH reactivity in urban and suburban regions in Seoul, South Korea – an East Asian megacity in a rapid transition. Faraday Discussions 2016, 189, 231 -251.

AMA Style

Saewung Kim, Dianne Sanchez, Mark Wang, Roger Seco, Daun Jeong, Stacey Hughes, Barbara Barletta, Donald R. Blake, Jinsang Jung, Deugsoo Kim, Gangwoong Lee, Meehye Lee, Joonyoung Ahn, Sang-Deok Lee, Gangnam Cho, Min-Young Sung, Yong-Hwan Lee, Dan Bi Kim, Younha Kim, Jung-Hun Woo, Duseong Jo, Rokjin Park, Jeong-Hoo Park, You-Deog Hong, Ji-Hyung Hong. OH reactivity in urban and suburban regions in Seoul, South Korea – an East Asian megacity in a rapid transition. Faraday Discussions. 2016; 189 ():231-251.

Chicago/Turabian Style

Saewung Kim; Dianne Sanchez; Mark Wang; Roger Seco; Daun Jeong; Stacey Hughes; Barbara Barletta; Donald R. Blake; Jinsang Jung; Deugsoo Kim; Gangwoong Lee; Meehye Lee; Joonyoung Ahn; Sang-Deok Lee; Gangnam Cho; Min-Young Sung; Yong-Hwan Lee; Dan Bi Kim; Younha Kim; Jung-Hun Woo; Duseong Jo; Rokjin Park; Jeong-Hoo Park; You-Deog Hong; Ji-Hyung Hong. 2016. "OH reactivity in urban and suburban regions in Seoul, South Korea – an East Asian megacity in a rapid transition." Faraday Discussions 189, no. : 231-251.

Journal article
Published: 01 January 2015 in Atmospheric Environment
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We investigate ozone air quality changes in 2050 caused by global changes in climate and anthropogenic emissions of ozone precursors by using a global chemical transport model driven by meteorological fields from a general circulation model. We use projected emissions based on the Representative Concentration Pathway (RCP) scenarios and conduct model simulations to quantify the effects of climate and emission changes on future air quality, focusing on ozone in surface air. Our model results show that annual mean concentrations of surface ozone will be lower in 2050 relative to 2000 by -3.3, -3.7, and -4.2 ppbv under RCP6.0, RCP4.5, and RCP2.6, respectively. In contrast, the RCP8.5 projection results in a slight increase of 2.1 ppbv caused by a methane increase. The ozone reductions are driven primarily by decreases in NOx emission, which dominate the climate penalty on ozone driven by temperature increases. We also estimate the effect of 21st century climate change on ozone air quality, assuming no changes in anthropogenic emissions of ozone precursors in the future. We further use a statistical method to analyze the results in order to quantify the effect of each meteorological variable change on ozone concentration in summer. Temperature increase is found to result in ozone increases of up to 2.2 ppbv over land. Ozone over the oceans, however, is largely reduced with specific humidity increase, particularly in the Northern Hemisphere, where the ozone concentration decreases by 0.8 ppbv. We find that future increases in natural NOx emissions from lightning and soil make an important contribution to the formation of nitric acid and might seriously offset future decreases in nitrogen deposition caused by anthropogenic NOx emission reduction.close4

ACS Style

Minjoong J. Kim; Rokjin J. Park; Chang-Hoi Ho; Jung-Hun Woo; Ki-Chul Choi; Chang-Keun Song; Jae-Bum Lee. Future ozone and oxidants change under the RCP scenarios. Atmospheric Environment 2015, 101, 103 -115.

AMA Style

Minjoong J. Kim, Rokjin J. Park, Chang-Hoi Ho, Jung-Hun Woo, Ki-Chul Choi, Chang-Keun Song, Jae-Bum Lee. Future ozone and oxidants change under the RCP scenarios. Atmospheric Environment. 2015; 101 ():103-115.

Chicago/Turabian Style

Minjoong J. Kim; Rokjin J. Park; Chang-Hoi Ho; Jung-Hun Woo; Ki-Chul Choi; Chang-Keun Song; Jae-Bum Lee. 2015. "Future ozone and oxidants change under the RCP scenarios." Atmospheric Environment 101, no. : 103-115.

Original articles
Published: 05 June 2014 in International Journal of Geographical Information Science
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A major obstacle of the interdisciplinary communications for decision-making is that each participant prefers the solution from their own area because current collaboration systems cannot effectively mediate among many alternatives. If a visual collaboration system could display multiple alternatives in a single visual presentation, users would be able to compare alternatives with only a few variables, where all other parameters are fixed, at least from a visual perspective. In this study, we developed a visualization tool to support a microscale air quality (MSAQ) management group, the members of which often need to compare the effects of many alternative control methods. The main achievements of this study are: (1) three-dimensional (3D) visualization of the MSAQ using a 3D city model and (2) development of a geospatial spreadsheet (GS) to facilitate visual comparisons, thereby improving decision-making by making it easy to compare differences based on realistic visual display items. A questionnaire-based survey showed that use of the GS could generate a shared perspective and provide a spatiotemporal context for the participants, thereby making it easy to compare, mediate and reach decisions when confronted with many alternatives.

ACS Style

Seung Man An; Ho-Young Lee; Byungsoo Kim; Chae-Yeon Yi; Jeong-Hee Eum; Jung-Hun Woo. Geospatial spreadsheets with microscale air quality visualization and synchronization for supporting multiple-scenario visual collaboration. International Journal of Geographical Information Science 2014, 28, 2511 -2532.

AMA Style

Seung Man An, Ho-Young Lee, Byungsoo Kim, Chae-Yeon Yi, Jeong-Hee Eum, Jung-Hun Woo. Geospatial spreadsheets with microscale air quality visualization and synchronization for supporting multiple-scenario visual collaboration. International Journal of Geographical Information Science. 2014; 28 (12):2511-2532.

Chicago/Turabian Style

Seung Man An; Ho-Young Lee; Byungsoo Kim; Chae-Yeon Yi; Jeong-Hee Eum; Jung-Hun Woo. 2014. "Geospatial spreadsheets with microscale air quality visualization and synchronization for supporting multiple-scenario visual collaboration." International Journal of Geographical Information Science 28, no. 12: 2511-2532.

Research article
Published: 30 November 2013 in International Journal of Climatology
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Quantitatively describing effects caused by trees is a challenging issue for sky view factor (SVF) studies. The complex geometrical shapes of trees and the seasonally changing canopy volume caused by leaf growth and defoliation have forced SVF users to disregard trees in their analyses or to apply a simple geometric object, such as a rectangular pole or vertically elongated ellipsoid. The three‐dimensional point cloud (3DPC) method is useful for quantitative analysis of urban settings by describing the structured spatial complex in detail, not only by shape itself but also with many meaningful indices such as SVF. We here proposed a new SVF analysis method based on 3DPC. Stereoscopic projection was applied to project 3DPC on the virtual hemisphere. From intensive analysis of 3DPC SVF in a normal urban complex area, we discerned the effects caused by trees. The results showed that the tree effect derived from 3DPC SVF in an urban complex is clearly described by a comparison between two cases (trees and no trees). Trees with topography play an important role and contribute to the heat balance in an urban complex.

ACS Style

Seung Man An; Byung Soo Kim; Ho Yung Lee; Chang Hun Kim; C. Y. Yi; Jeonghee Eum; Jung Hoon Woo. Three-dimensional point cloud based sky view factor analysis in complex urban settings. International Journal of Climatology 2013, 34, 2685 -2701.

AMA Style

Seung Man An, Byung Soo Kim, Ho Yung Lee, Chang Hun Kim, C. Y. Yi, Jeonghee Eum, Jung Hoon Woo. Three-dimensional point cloud based sky view factor analysis in complex urban settings. International Journal of Climatology. 2013; 34 (8):2685-2701.

Chicago/Turabian Style

Seung Man An; Byung Soo Kim; Ho Yung Lee; Chang Hun Kim; C. Y. Yi; Jeonghee Eum; Jung Hoon Woo. 2013. "Three-dimensional point cloud based sky view factor analysis in complex urban settings." International Journal of Climatology 34, no. 8: 2685-2701.

Journal article
Published: 30 September 2013 in Land Use Policy
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The main aim of this paper is to examine ways to integrate urban climate information into urban planning using spatially distributed information. To achieve this, the structures of urban planning in the study area and their contents concerning climate issues were examined. Spatially distributed information on ventilation, air quality and thermal situation in the study area was generated using the CAMPUS framework, which is a set of climate analysis and evaluation tools suitable for planning purposes. Finally, urban planning strategies concerning ventilation, air quality and thermal situation were suggested, and planning measures for implementing the planning strategies were recommended. This study will contribute to a discussion on how urban climate information can be more efficiently considered in urban spatial planning. Furthermore, the information generated in this study can support the development of an evaluative framework for the integration of the climate information into the environmental assessment process, e.g. the implementation of strategic environmental assessment (SEA) in urban planning.

ACS Style

Jeong-Hee Eum; Dieter Scherer; Ute Fehrenbach; Johann Köppel; Jung-Hun Woo. Integrating urban climate into urban master plans using spatially distributed information—The Seoul example. Land Use Policy 2013, 34, 223 -232.

AMA Style

Jeong-Hee Eum, Dieter Scherer, Ute Fehrenbach, Johann Köppel, Jung-Hun Woo. Integrating urban climate into urban master plans using spatially distributed information—The Seoul example. Land Use Policy. 2013; 34 ():223-232.

Chicago/Turabian Style

Jeong-Hee Eum; Dieter Scherer; Ute Fehrenbach; Johann Köppel; Jung-Hun Woo. 2013. "Integrating urban climate into urban master plans using spatially distributed information—The Seoul example." Land Use Policy 34, no. : 223-232.

Journal article
Published: 31 August 2013 in Journal of Korean Society for Atmospheric Environment
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Rae Seol Park; Kyung Man Han; Chul Han Song; Mi Eun Park; So Jin Lee; Song You Hong; Jhoon Kim; Jung-Hun Woo. Current Status and Development of Modeling Techniques for Forecasting and Monitoring of Air Quality over East Asia. Journal of Korean Society for Atmospheric Environment 2013, 29, 407 -438.

AMA Style

Rae Seol Park, Kyung Man Han, Chul Han Song, Mi Eun Park, So Jin Lee, Song You Hong, Jhoon Kim, Jung-Hun Woo. Current Status and Development of Modeling Techniques for Forecasting and Monitoring of Air Quality over East Asia. Journal of Korean Society for Atmospheric Environment. 2013; 29 (4):407-438.

Chicago/Turabian Style

Rae Seol Park; Kyung Man Han; Chul Han Song; Mi Eun Park; So Jin Lee; Song You Hong; Jhoon Kim; Jung-Hun Woo. 2013. "Current Status and Development of Modeling Techniques for Forecasting and Monitoring of Air Quality over East Asia." Journal of Korean Society for Atmospheric Environment 29, no. 4: 407-438.

Journal article
Published: 01 October 2012 in Atmospheric Environment
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Jung-Hun Woo; Ki-Chul Choi; Hyeon-Kook Kim; Bok H. Baek; Meongdo Jang; Jeong-Hee Eum; Chul Han Song; Young-Il Ma; Young Sunwoo; Lim-Seok Chang; Seung Heon Yoo. Development of an anthropogenic emissions processing system for Asia using SMOKE. Atmospheric Environment 2012, 58, 5 -13.

AMA Style

Jung-Hun Woo, Ki-Chul Choi, Hyeon-Kook Kim, Bok H. Baek, Meongdo Jang, Jeong-Hee Eum, Chul Han Song, Young-Il Ma, Young Sunwoo, Lim-Seok Chang, Seung Heon Yoo. Development of an anthropogenic emissions processing system for Asia using SMOKE. Atmospheric Environment. 2012; 58 ():5-13.

Chicago/Turabian Style

Jung-Hun Woo; Ki-Chul Choi; Hyeon-Kook Kim; Bok H. Baek; Meongdo Jang; Jeong-Hee Eum; Chul Han Song; Young-Il Ma; Young Sunwoo; Lim-Seok Chang; Seung Heon Yoo. 2012. "Development of an anthropogenic emissions processing system for Asia using SMOKE." Atmospheric Environment 58, no. : 5-13.

Journal article
Published: 01 October 2012 in Atmospheric Environment
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ACS Style

Soo Ya Bae; Rokjin J. Park; Yong Pyo Kim; Jung-Hun Woo. Effects of below-cloud scavenging on the regional aerosol budget in East Asia. Atmospheric Environment 2012, 58, 14 -22.

AMA Style

Soo Ya Bae, Rokjin J. Park, Yong Pyo Kim, Jung-Hun Woo. Effects of below-cloud scavenging on the regional aerosol budget in East Asia. Atmospheric Environment. 2012; 58 ():14-22.

Chicago/Turabian Style

Soo Ya Bae; Rokjin J. Park; Yong Pyo Kim; Jung-Hun Woo. 2012. "Effects of below-cloud scavenging on the regional aerosol budget in East Asia." Atmospheric Environment 58, no. : 14-22.

Journal article
Published: 31 March 2012 in Atmosphere
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Hee-Wook Choi; Do-Yong Kim; Jae-Jin Kim; Ki-Young Kim; Jung-Hun Woo. Study on Dispersion Characteristics for Fire Scenarios in an Urban Area Using a CFD-WRF Coupled Model. Atmosphere 2012, 22, 47 -55.

AMA Style

Hee-Wook Choi, Do-Yong Kim, Jae-Jin Kim, Ki-Young Kim, Jung-Hun Woo. Study on Dispersion Characteristics for Fire Scenarios in an Urban Area Using a CFD-WRF Coupled Model. Atmosphere. 2012; 22 (1):47-55.

Chicago/Turabian Style

Hee-Wook Choi; Do-Yong Kim; Jae-Jin Kim; Ki-Young Kim; Jung-Hun Woo. 2012. "Study on Dispersion Characteristics for Fire Scenarios in an Urban Area Using a CFD-WRF Coupled Model." Atmosphere 22, no. 1: 47-55.

Journal article
Published: 30 December 2011 in Landscape and Urban Planning
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Jeong-Hee Eum; Dieter Scherer; Ute Fehrenbach; Jung-Hun Woo. Development of an urban landcover classification scheme suitable for representing climatic conditions in a densely built-up Asian megacity. Landscape and Urban Planning 2011, 103, 362 -371.

AMA Style

Jeong-Hee Eum, Dieter Scherer, Ute Fehrenbach, Jung-Hun Woo. Development of an urban landcover classification scheme suitable for representing climatic conditions in a densely built-up Asian megacity. Landscape and Urban Planning. 2011; 103 (3-4):362-371.

Chicago/Turabian Style

Jeong-Hee Eum; Dieter Scherer; Ute Fehrenbach; Jung-Hun Woo. 2011. "Development of an urban landcover classification scheme suitable for representing climatic conditions in a densely built-up Asian megacity." Landscape and Urban Planning 103, no. 3-4: 362-371.

Research article
Published: 14 January 2011 in Concurrency and Computation: Practice and Experience
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AirScope is a micro‐scale modeling system as well as a micro‐scale air quality monitoring system, which comprises as a micro‐scale air quality management system. Importance of micro‐scale air monitoring is rising due to the concern about environment near residential places. Traditional monitoring methods are providing overall air quality indexes. However, these methods have limited functionalities to provide air quality of near my house or where I am now. In this paper, we are trying to overcome the limitation of traditional methods by using ubiquitous sensor network (USN). AirScope consists of computational fluid dynamics based air quality modeling, USN‐based sensor monitoring, and multi‐modal interaction platform. We present a brief overview of AirScope and several aspects of constructed initial indoor test environment with a few validity tests. The proposed system will be extended to an outdoor real‐world testbed with most of modern urban elements. Copyright © 2011 John Wiley & Sons, Ltd.

ACS Style

Jung-Hun Woo; Hyungseok Kim; Sang Boem Lim; Jae-Jin Kim; Jonghyun Lee; Rina Ryoo; Hansoo Kim; Le Dinh Minh. Constructing u-City of Seoul by future foresight analysis. Concurrency and Computation: Practice and Experience 2011, 23, 1114 -1126.

AMA Style

Jung-Hun Woo, Hyungseok Kim, Sang Boem Lim, Jae-Jin Kim, Jonghyun Lee, Rina Ryoo, Hansoo Kim, Le Dinh Minh. Constructing u-City of Seoul by future foresight analysis. Concurrency and Computation: Practice and Experience. 2011; 23 (10):1114-1126.

Chicago/Turabian Style

Jung-Hun Woo; Hyungseok Kim; Sang Boem Lim; Jae-Jin Kim; Jonghyun Lee; Rina Ryoo; Hansoo Kim; Le Dinh Minh. 2011. "Constructing u-City of Seoul by future foresight analysis." Concurrency and Computation: Practice and Experience 23, no. 10: 1114-1126.