Yongjoo Choi (Ph.D)

Contact information

Yongjoo Choi (Ph.D)

Postdoctoral Researcher
Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
Research Institute for Global Change (RIGC)
Earth Surface System Research Center (ESS)

Address

3173-25 Showa-machi, Kanazawa-ku, Yokohama, Kanagawa 236-0001, Japan
Phone: +81-45-778-5860, FAX: +81-45-778-5706

Research Interests

  • Black carbon (measurement, emission inventory, and wet scavenging module in chemical transport model)
  • Aerosol optical properties from AERONET and SKYNET (classification of major aerosol types and estimation of the aerosol chemical composition)
  • Atmospheric trace gases observation using MAX-DOAS

Research Experience

Postdoctoral Researcher

Japan Agency for Marine-Earth Science and Technology (JAMSTEC) 2018.11 –

Research Professor

Hankuk University of Foreign Studies, Korea 2018. 1 – 2018.11

Postdoctoral Researcher

Hankuk University of Foreign Studies, Korea 2014. 3 – 2017.12

Education

Ph.D. Environmental Science

Hankuk University of Foreign Studies, Korea
Dissertation: “Representativeness, identification, and validation of column-integrated aerosols from ground-based optical networks.”		 2014.

M.S. Environmental Science

Hankuk University of Foreign Studies, Korea
Dissertation: “Studies of Optical Properties of Columnar Aerosols in the Downwind Area of Seoul using Skyradiometer.”		 2009

B.S. Environmental Science

Hankuk University of Foreign Studies, Korea 2007.

Peer-reviewed paper

SCI(E)

  • 1. Choi, Y., Kanaya, Y., Park, S.-M., Matsuki, A., Sadanaga, Y., Kim, S.-W., Uno, I., Pan, X., Lee, M., Kim, H., and Jung, D. H.: Regional variability in black carbon and carbon monoxide ratio from long-term observations over East Asia: assessment of representativeness for black carbon (BC) and carbon monoxide (CO) emission inventories, Atmos. Chem. Phys., 20, 83–98, https://doi.org/10.5194/acp-20-83-2020, 2020a.
  • 2. Choi, Y., Kanaya, Y., Takigawa, M., Zhu, C., Park, S. M., Matsuki, A., Sadanaga, Y., Kim, S. W., Pan, X., and Pisso, I.: Investigation of the wet removal rate of black carbon in East Asia: validation of a below- and in-cloud wet removal scheme in FLEXPART v10.4, Atmos. Chem. Phys., 2020, 1-25, 10.5194/acp-2020-402, 2020b.
  • 3. Choi, Y., Ghim, Y. S., Kim, S.-W., and Yeo, H.: Development of a cloud-screening algorithm for direct and diffuse AODs from the Skyradiometer Network, Atmospheric Research, 243, 104997, https://doi.org/10.1016/j.atmosres.2020.104997, 2020c.
  • 4. Kanaya, Y., Yamaji, K., Miyakawa, T., Taketani, F., Zhu, C., Choi, Y., Komazaki, Y., Ikeda, K., Kondo, Y., and Klimont, Z.: Rapid reduction in black carbon emissions from China: evidence from 2009–2019 observations on Fukue Island, Japan, Atmos. Chem. Phys., 20, 6339-6356, 10.5194/acp-20-6339-2020, 2020.
  • 5. Kim, H. J., Lee, T., Park, T., Park, G., Collett, J. L., Park, K., Ahn, J. Y., Ban, J., Kang, S., Kim, K., Park, S.-M., Jho, E. H., and Choi, Y.: Ship-borne observations of sea fog and rain chemistry over the North and South Pacific Ocean, Journal of Atmospheric Chemistry, 76, 315-326, 10.1007/s10874-020-09403-8, 2020.
  • 6. Park, T., Choi, Y., Choi, J., Ahn, J., Park, J., Lee, Y., Ban, J., Park, G., Kang, S., Kim, K., Seo, B.-K., Kim, J., Park, S., Kim, H., Jeon, H., and Lee, T.: Aircraft Measurements of Physicochemical Evolution of Atmospheric Aerosols in Air Pollution Plumes over a Megacity and Suburban Areas, Aerosol and Air Quality Research, 20, 10.4209/aaqr.2019.12.0649, 2020.
  • 7. Choi, Y., and Ghim, Y. S.: Assessment of the clear-sky bias issue using continuous PM10 data from two AERONET sites in Korea, Journal of Environmental Sciences, 53, 151-160, 2017.
  • 8. Choi, Y., Rhee, T. S., Collett Jr, J. L., Park, T., Park, S.-M., Seo, B.-K., Park, G., Park, K., and Lee, T.: Aerosol concentrations and composition in the North Pacific marine boundary layer, Atmospheric Environment, 171, 165-172, 2017.
  • 9. Ghim, Y. S., Choi, Y., Kim, S., Bae, C. H., Park, J., and Shin, H. J.: Evaluation of model performance for forecasting fine particle concentrations in Korea, Aerosol and Air Quality Research, 17, 1856-1864, 2017.
  • 10. Link, M. F., Kim, J., Park, G., Lee, T., Park, T., Babar, Z. B., Sung, K., Kim, P., Kang, S., Kim, J. S., Choi, Y., Son, J., Lim, H.-J., and Farmera, D. K.: Elevated production of NH4NO3 from the photochemical processing of vehicle exhaust: implications for air quality in the Seoul Metropolitan Region, Atmospheric Environment, 156, 95-101, 2017.
  • 11. Choi, Y., and Ghim, Y. S.: Estimation of columnar concentrations of absorbing and scattering fine mode aerosol components using AERONET data, Journal of Geophysical Research: Atmospheres, 121, 2016.
  • 12. Choi, Y., Ghim, Y. S., and Holben, B. N.: Identification of columnar aerosol types under high aerosol optical depth conditions for a single AERONET site in Korea, Journal of Geophysical Research: Atmospheres, 121, 1264-1277, 2016.
  • 13. Lee, Y. H., Choi, Y., and Ghim, Y. S.: Classification of diurnal patterns of particulate inorganic ions downwind of metropolitan Seoul, Environmental Science and Pollution Research, 23, 8917-8928, 2016.
  • 14. Kim, C. H., Choi, Y., and Ghim, Y. S.: Characterization of volatilization of filter-sampled PM2. 5 semi-volatile inorganic ions using a backup filter and denuders, Aerosol and Air Quality Research, 15, 814-280, 2015.
  • 15. Lee, T., Choi, J., Lee, G., Ahn, J., Park, J. S., Atwood, S. A., Schurman, M., Choi, Y., Chung, Y., and Collett Jr, J. L.: Characterization of aerosol composition, concentrations, and sources at Baengnyeong Island, Korea using an aerosol mass spectrometer, Atmospheric Environment, 120, 297-306, 2015.
  • 16. Ghim, Y. S., Choi, Y., Chang, Y.-S., and Kim, J.: Natural and anthropogenic influences on heavy metals in airborne particles over the Korean Peninsula, Environmental Science and Pollution Research, 21, 10713-10724, 2014.

SCOPUS

  • 1. Ghim, Y. S., Choi, Y., Park, J., Kim, S., Bae, C. H., Seo, J., Shin, H. J., Lim, Y. J., Lyu, Y. S., and Lee, Y. J.: Overall Characteristics of Nationwide High PM2.5 Episodes during 2013~2016, Journal of Korean Society for Atmospheric Environment, 35, 609-624, 2019.
  • 2. Ghim, Y. S., Choi, Y., Kim, S., Bae, C. H., Park, J., and Shin, H. J.: Bias Correction for Forecasting PM 2.5 Concentrations Using Measurement Data from Monitoring Stations by Region, Asian Journal of Atmospheric Environment, 12, 2018.
  • 3. Choi, J., Choi, Y., Ahn, J., Park, J., Oh, J., Lee, G., Park, T., Park, G., Owen, J. S., and Lee, T.: Observation of Secondary Organic Aerosol and New Particle Formation at a Remote Site in Baengnyeong Island, Korea, Asian Journal of Atmospheric Environment, 11, 300-312, 2017.
  • 4. Ghim, Y. S., Choi, Y., Kim, S., Bae, C. H., Park, J., and Shin, H. J.: Model Performance Evaluation and Bias Correction Effect Analysis for Forecasting PM2.5 Concentrations, Journal of Korean Society for Atmospheric Environment, 33, 11-18, 2017a.
  • 5. Ghim, Y. S., Choi, Y., Park, J., Kim, P., and Han, Y. K.: Comparison of PM2.5 Concentrations by Measurement Method, Journal of Korean Society for Atmospheric Environment, 33, 515-520, 2017b.
  • 6. Park, J., Choi, Y., and Ghim, Y. S.: Columnar Aerosol Properties at Yongin According to Transport Paths of Back Trajectories, Journal of Korean Society for Atmospheric Environment, 33, 97-107, 2017a.
  • 7. Park, T., Ahn, J., Choi, J., Lim, Y., Park, J., Kim, J., Oh, J., Lee, Y., Hong, Y., Hong, J., Choi, Y., and Lee, T.: Physico-chemical Characteristics of Submicron Aerosol at West Inflow Regions in the Korean Peninsula III. Physical-Chemical Behavior and Long-range Transport of PM 1, Journal of Korean Society for Atmospheric Environment, 33, 124-138, 2017b.
  • 8. Choi, J.-S., Kim, J.-H., Lee, T., Choi, Y., Park, T., Ahn, J.-Y., Park, J.-S., Kim, H.-J., Koo, Y.-S., Kim, S.-D., Hong, Y.-D., and Hong, J.-H.: A Study on Chemical Characteristics of Aerosol Composition at West Inflow Regions in the Korean Peninsula II. Characteristics of Inorganic Aerosol Acidity and Organic Aerosol Oxidation, Journal of Korean Society for Atmospheric Environment, 32, 485-500, 2016a.
  • 9. Choi, J.-S., Kim, J.-H., Lee, T., Choi, Y., Park, T., Oh, J., Park, J.-S., Ahn, J.-Y., Jeon, H.-E., Koo, Y.-S., Kim, S.-D., Hong, Y.-D., and Hong, J.-H.: A Study on Chemical Characteristics of Aerosol Composition at West Inflow Regions in the Korean Peninsula I. Characteristics of PM Concentration and Chemical Components, Journal of Korean Society for Atmospheric Environment, 32, 469-484, 2016b.
  • 10. Ghim, Y. S., Won, S. R., Choi, Y., Chang, Y.-S., Jin, H. C., Kim, Y. P., and Kang, C.-H.: Concentration Variations in Primary and Secondary Particulate Matter near a Major Road in Korea, Asian Journal of Atmospheric Environment, 10, 2016.
  • 11. Lee, J. T., Son, J., Kim, J., Choi, Y., Yoo, H.-M., Kim, K. J., Kim, J. S., Park, S. W., Park, G., and Park, T.: Comparison of Chemical Composition of Particulate Matter Emitted from a Gasoline Direct Injected (GDI) Vehicle and a Port Fuel Injected (PFI) Vehicle using High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS), Asian Journal of Atmospheric Environment, 10, 51-56, 2016.
  • 12. Choi, Y., Choi, J., Park, T., Kang, S., and Lee, T.: Characterization of Particulate Emissions from Biodiesel using High Resolution Time of Flight Aerosol Mass Spectrometer, Asian Journal of Atmospheric Environment, 9, 2015.
  • 13. Ghim, Y. S., Choi, Y., Park, J. S., and Kim, C. H.: An Assessment Study for the Urban Air Monitoring Network in Seoul, Journal of Korean Society for Atmospheric Environment, 30, 504-509, 2014.
  • 14. Choi, S.-H., Choi, Y., and Ghim, Y.S.: Analysis of Asian Dust Events in Korea between 1997 and 2005, Asian Journal of Atmospheric Environment, 7, 114-119, 2013.
  • 15. Won, S.-R., Choi, Y., Kim, A., Choi, S.-H., and Ghim, Y.S.: Ion concentrations of particulate matter in Yongin in spring and fall, Journal of Korean Society for Atmospheric Environment, 26, 265-275, 2010.

Academic Honors and Awards

Academic Excellence Scholarship
HUFS		 2006. 3 – 2007. 9
ABC Training School
UNEP		 2008.12
Scholarship,
Seoul Scholarship Foundation		 2009. 9 – 2011. 8
Best oral presentation award
Korean Society for Atmospheric Environment		 2008
Best oral presentation award
IUAPPA World Congress		 2016
Outstanding achievements of the KORUS-AQ
2017		 NASA