A5042152005- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Vehicle emissions and performance
- Cryospheric studies and observations
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Agriculture, Soil, Plant Science
- Toxic Organic Pollutants Impact
- Marine and Coastal Research
- Internet of Things and Social Network Interactions
- Ecology and Conservation Studies
- Thyroid and Parathyroid Surgery
- Tracheal and airway disorders
- Nasal Surgery and Airway Studies
- Mercury impact and mitigation studies
- Insect and Arachnid Ecology and Behavior
- Energy and Environmental Systems
- Isotope Analysis in Ecology
- Study of Mite Species
- Archaeology and ancient environmental studies
- Voice and Speech Disorders
Chungnam National University
2022-2025
Korea University
2011-2022
Université Grenoble Alpes
2012-2017
Institut des Géosciences de l'Environnement
2016-2017
Centre National de la Recherche Scientifique
2012-2016
Laboratoire de Glaciologie et Géophysique de l’Environnement
2012-2015
Université Joseph Fourier
2013-2014
Observatoire des sciences de l'Univers Paris-Saclay
2013
Observatoire des Sciences de l'Univers de Grenoble
2013
Abstract. PM1.0, PM2.5, and PM10 were sampled at Gosan ABC Superstation on Jeju Island from August 2007 to September 2008. The carbonaceous aerosols quantified with the thermal/optical reflectance (TOR) method, which produced five organic carbon (OC) fractions, OC1, OC2, OC3, OC4, pyrolyzed (OP), three elemental (EC) EC1, EC2, EC3. mean mass concentrations of 13.7 μg m−3, 17.2 28.4 respectively. averaged fractions OC EC 23.0% 10.4% for 22.9% 9.8% 16.4% 6.0% PM10. Among sub-components, OC2...
Abstract. Accurate measurement of black carbon (BC) mass concentrations in snow and ice is crucial for the assessment climatic impacts. However, it difficult to compare methods used assess BC levels literature as they are not same. The single particle soot photometer (SP2) method appears be one most suitable measure low ice. In this paper, we evaluated a quantification refractory (rBC) samples coupling SP2 with APEX-Q nebulizer. paper reviews all steps rBC determination, including...
Abstract. We applied a climate-chemistry global model to evaluate the impact of black carbon (BC) deposition on Himalayan snow cover from 1998 2008. Using stretched grid with resolution 50 km over this complex topography, reproduces reasonably well remotely sensed observations duration. Similar observations, modelled atmospheric BC concentrations in central Himalayas reach minimum during monsoon and maximum post- pre-monsoon periods. Comparing simulated is more challenging because their high...
Abstract. A shallow ice core was extracted at the summit of Mera Peak 6376 m a.s.l. in southern flank Nepalese Himalaya range. From this core, we reconstructed seasonal deposition fluxes dust and refractory black carbon (rBC) since 1999. This archive presents well preserved cycles based on a monsoonal precipitation pattern. According to regime which 80% annual falls between June September, estimated changes concentrations these aerosols surface snow. The analyses revealed that mass are few...
Abstract Black carbon emitted by incomplete combustion of fossil fuels and biomass has a net warming effect in the atmosphere reduces albedo when deposited on ice snow; accurate knowledge past emissions is essential to quantify model associated global climate forcing. Although bottom-up inventories provide historical Carbon emission estimates that are widely used Earth System Models, they poorly constrained observations prior late 20th century. Here we use an objective inversion technique...
Abstract. Black carbon (BC) in snow the Himalayas has recently attracted considerable interest due to its impact on albedo, and glacier melting, regional climate water resources. A single particle soot photometer (SP2) instrument was used measure refractory BC (rBC) a series of surface samples collected upper Khumbu Valley, Nepal between November 2009 February 2012. The obtained time indicates annual cycles with maximum rBC concentrations before onset monsoon season fast decreases during...
Abstract. Black carbon (BC), emitted by fossil fuel combustion and biomass burning, is the second largest man-made contributor to global warming after dioxide (Bond et al., 2013). However, limited information exists on its past emissions atmospheric variability. In this study, we present first high-resolution record of refractory BC (rBC, including mass concentration size) reconstructed from ice cores drilled at a high-altitude eastern European site in Mt. Elbrus (ELB), Caucasus (5115 m...
Urban air pollution has consistently captured social and scientific attention due to its significant health climatic impacts. Among the short-lived climate pollutants (SLCPs) targeted for reduction, black carbon (BC) stands out as a critical component. BC is carbonaceous primary aerosol emitted from fossil fuel biomass combustion, with an atmospheric lifetime of approximately five days.This study involved tower-based field campaign conducted in late spring Incheon, South Korean city adjacent...
Abstract. A 182 m ice core was recovered from a borehole drilled into bedrock on the western plateau of Mt. Elbrus (43°20´53.9'' N, 42°25´36.0'' E; 5115 a.s.l.) in Caucasus, Russia, 2009. This is first region that represents paleoclimate record practically undisturbed by seasonal melting. Relatively high snow accumulation rates at drilling site enabled analysis intraseasonal variability climate proxies. Borehole temperatures ranged −17 °C 10 depth to −2.4 m. detailed radio-echo sounding...
Black carbon (BC) and brown (BrC) aerosols that are released from the combustion of fossil fuels biomass great concern because their light-absorbing ability abundance associated with various anthropogenic sources, particularly in East Asia. However, optical properties ambient dependent on mixing state chemical composition absorbing non-absorbing aerosols. Here we examined how, Asian outflows, parameters aerosol can be altered seasonally conjunction aerosols, using 3-year measurements. Our...
Abstract. PM2.5 haze pollution driven by secondary inorganic NO3- has been a great concern in East Asia. It is, therefore, imperative to identify its sources and oxidation processes, for which nitrogen oxygen stable isotopes are powerful tracers. Here, we determined the δ15N (NO3-) Δ17O of Seoul during summer 2018 winter 2018–2019 estimated quantitatively relative contribution pathways particulate investigated major NOx emission sources. In range mass concentration from 7.5 µg m−3 (summer)...
Abstract. Carbonaceous and soluble ionic species of PM1.0 PM10 were measured along with the absorption scattering properties aerosol number size distributions at Gosan Climate Observatory (GCO) from January to September 2008. The daily averaged equivalent black carbon (EBC) as exhibited two types spectral dependence a distinct maximum (peak) either 370 nm or 880 nm, by which subsets extracted classified into respective groups (370 nm). group was distinguished high organic (OC) concentrations...
Carbon- and nitrogen-containing aerosols are ubiquitous in urban atmospheres play important roles air quality climate change. We determined the 14C fraction modern (fM) δ13C of total carbon (TC) δ15N NH4+ PM2.5 collected Seoul megacity during April 2018 to December 2019. The seasonal mean values were similar -25.1‰ ± 2.0‰ warm -24.2‰ 0.82‰ cold seasons. Mean higher (16.4‰ 2.8‰) than seasons (4.0‰ 6.1‰), highlighting temperature effects on atmospheric NH3 levels phase-equilibrium isotopic...
Abstract. Accurate measurement of black carbon (BC) mass concentrations in snow and ice is crucial for the assessment climatic impacts. However, it difficult to compare methods used assess BC levels literature as they are not same. The single particle soot photometer (SP2) method appears be one most suitable measure low ice. deriving with SP2 straightforward different options may lead results. In this paper, we propose an optimized quantification refractory (rBC) samples using SP2. paper...
Organic carbon (OC) and elemental (EC) concentrations were determined for <TEX>$PM_{10}$</TEX>, <TEX>$PM_{2.5}$</TEX> <TEX>$PM_{1.0}$</TEX> aerosols particles collected at Gosan Superstation on Jeju Island from August 2007 to September 2008. Aerosols quartz filters 24 hours then OC EC analyzed by TOR/IMPROVED method. Mean of <TEX>$4.66\;{\mu}g/m^3$</TEX> <TEX>$1.69\;{\mu}g/m^3$</TEX> <TEX>$3.95\;{\mu}g/m^3$</TEX> <TEX>$PM_{2.5}$</TEX>, <TEX>$3.16\;{\mu}g/m^3$</TEX>...
Abstract. A shallow ice core of the southern flank Nepalese Himalaya range was extracted from summit Mera Peak at 6376 m a.s.l. in Nepal. From this core, we have reconstructed seasonal deposition fluxes dust and refractory black carbon (rBC) since 1999. This archive presents well preserved cycles based on monsoonal precipitation pattern. According to regime, 80% annual between June September, estimated surface snow concentrations evolution for these aerosols. The analyzes reveals that mass...