PEER-REVIEWED PUBLICATION
1. Um, J. and G. M. McFarquhar, 2007: Single-scattering properties of aggregates of bullet rosettes in cirrus cloud. J. Appl. Meteor. Climatol., 46, 757-775, https://doi.org/10.1175/ JAM2501.1.
2. McFarquhar, G. M., J. Um, M. Freer, D. Baumgardner, G. L. Kok, and G. G. Mace, 2007: Importance of small ice crystals to cirrus properties: Observations from the Tropical Warm Pool International Cloud Experiment (TWP-ICE). Geophys. Res. Lett., 34, L13803, https://doi.org/10.1029/2007GL029865.
3. Um, J. and G. M. McFarquhar, 2009: Single-scattering properties of aggregates of plates. Quart. J. Roy. Meteor. Soc., 135, 291-304, https://doi.org/10.1002/qj.378.
4. Um, J. and G. M. McFarquhar, 2011: Dependence of the single-scattering properties of small ice crystals on idealized shape models. Atmos. Chem. Phys., 11, 3159-3171, https://doi.org/ 10.5194/acp-11-3159-2011.
5. Protat, A., G. M. McFarquhar, J. Um, and J. Delano ̈e, 2011: Obtaining best estimates for the microphysical and radiative properties of tropical ice clouds from TWP-ICE in-situ microphysical observations. J. Appl. Meteor. Climatol., 50, 895-915, https://doi.org/10.1175/ 2010JAMC2401.1.
6. Nousiainen, T., H. Lindqvist, G. M. McFarquhar, and J. Um, 2011: Small irregular ice crystals in tropical cirrus. J. Atmos. Sci., 68, 2614-2627, https://doi.org/10.1175/2011JAS3733.1.
7. Lindqvist, H., K. Muinonen, T. Nousiainen, J. Um, G. M. McFarquhar, P. Haapanala, R. Makkonen, and H. Hakkarainen, 2012: Ice-cloud particle habit classification using principal components. J. Geophys. Res., 117, D16206, https://doi.org/10.1029/2012JD017573.
8. McFarquhar, G. M., J. Um, and R. Jackson, 2013: Small cloud particle shapes in mixed- phase clouds. J. Appl. Meteor. Climatol., 52, 1277-1293, https://doi.org/10.1175/JAMC-D- 12-0114.1.
9. Jung, C. H., J. Um, Y. H. Shin, S. Y. Bae, and Y. P. Kim 2013: Optical properties of polydispersed atmospheric aerosols following wet removal. Part. Sci. Technol., 31:6, 612-620, http://dx.doi.org/10.1080/02726351.2013.822037.
10. Um, J. and G. M. McFarquhar, 2013: Optimal numerical methods for determining the orien- tation averages of single-scattering properties of atmospheric ice crystals.
11. Jung, C. H., J. Um, J. Y. Lee, and Y. P. Kim, 2013: Sensitivity analysis of the ̊Angstrom exponent for multimodal aerosol size distributions. Asia-Pacific J. Atmos. Sci., 49(5), 625- 634, https://doi.org/10.1007/s13143-013-0055-5. J. Quant. Spectrosc. Radiat. Transfer, 127, 207-223, http://dx.doi.org/10.1016/j.jqsrt.2013.05.020.
12. Um, J., G. M. McFarquhar, Y. P. Hong, S.-S. Lee, C. H. Jung, R. P. Lawson, and Q. Mo, 2015: Dimensions and aspect ratios of natural ice crystals. Atmos. Chem. Phys., 15, 3933-3956, https://doi.org/10.5194/acp-15-3933-2015.
13. Jung, C. H., J. Um, Y. H. Shin, S.-S. Lee, Y. G. Lee, S. Y. Bae, and Y. P. Kim 2015: Minimum collection efficiency diameter during snow scavenging process. Part. Sci. Technol., 33, 321-330, http://dx.doi.org/10.1080/02726351.2014.970311.
14. Um, J. and G. M. McFarquhar, 2015: Formation of atmospheric halos and applicability of geometric optics for calculating single-scattering properties of hexagonal ice crystals: Impacts of aspect ratio and ice crystal size. J. Quant. Spectrosc. Radiat. Transfer, 165, 134-152, http://dx.doi.org/10.1016/j.jqsrt.2015.07.001.
15. Fridlind, A. M., R. Atlas, B. van Diedenhoven, J. Um, G. M. McFarquhar, A. S. Ackerman, E. J. Moyer, and R. P. Lawson, 2016: Derivation of physical and optical properties of midlatitude cirrus ice crystals for a size-resolved microphysics model. Atmos. Chem. Phys., 16, 7251-7283, https://doi.org/10.5194/acp-16-7251-2016.
16. Lee, S. S., B.-G. Kim, S. S. Yum, K.-H. Seo, C.-H. Jung, J. Um, Z. Li, J. Hong, K.-H. Chang, and J.-Y. Jeong, 2017: Effects of aerosol on evaporation, freezing and precipitation in a multiple cloud system. Clim. Dyn., 48, 1069-1087, https://doi.org/10.1007/s00382-016-3128-1.
17. Baumgardner, D., S. Abel, D. Axisa, R. Cotton, J. Crosier, P. Field, P. Field, C. Gurganus, A. Heymsfield, A. Korolev, M. Kr ̈amer, P. Lawson, G. McFarquhar, Z. Ulanowski, and J. Um, 2017: Cloud ice properties: In situ measurement challenges. Meteor. Monogr., 58, 9.1-9.23, https://doi.org/10.1175/AMSMONOGRAPHS-D-16-0011.1.
18. McFarquhar, G. M., D. Baumgardner, A. Bansemer, S. J. Abel, J. Crosier, J. French, P. Rosenberg, A. Korolev, A. Schwarzoenboeck, D. Leroy, J. Um, W. Wu, A. J. Heymsfield, C. Twohy, A. Detwiler, P. Field, A. Neumann, R. Cotton, D. Axisa, and J. Dong, 2017: Processing of ice cloud in situ data collected by bulk water, scattering, and imaging probes: Fundamentals, uncertainties, and efforts toward consistency. Meteor. Monogr., 58, 11.1-11.33, https://doi.org/10.1175/AMSMONOGRAPHS-D-16-0007.1.
19. Lee, S. S., Z. Li, Y. Zhang, H. Yoo, S. Kim, B.-G. Kim, Y.-S. Choi, J. Mok, J. Um, K. O. Choi, and D. Dong, 2018: Effects of model resolution and parameterizations on the simulations of clouds, precipitation, and their interactions with aerosols. Atmos. Chem. Phys., 18, 13-29, https://doi.org/10.5194/acp-18-13-2018.
20. Jung, C. H., J. Y. Lee, J. Um, S. S. Lee, and Y. P. Kim, 2018: Chemical composition based aerosol optical properties according to size distribution and mixture types during smog and Asian dust events in Seoul, Korea. Asia-Pacific J. Atmos. Sci., 54(1), 19-32, https://doi.org/10.1007/s13143-017-0053-0.
21. Jung, C. H., J. Um, S. Y. Bae, Y. J. Yoon, S. S. Lee, J. Y. Lee and Y. P. Kim, 2018: Analytic expression for the aerosol mass efficiencies for polydispersed accumulation mode. Aerosol and Air Quality Research, 18, 1503-1514, doi:10.4209/aaqr.2018.02.0067.
22. Lee, S. S., B.-G. Kim, Z. Li, Y.-S. Choi, C.-H. Jung, J. Um, J. Mok, and K.-H. Seo, 2018: Aerosol as a potential factor to control the increasing torrential rain events in urban areas over the last decades. Atmos. Chem. Phys., 18, 12531-12550, https://doi.org/10.5194/acp- 18-12531-2018.
23. Um, J., G. M. McFarquhar, J. L. Stith, C. H. Jung, S. S. Lee, J. Y. Lee, Y. Shin, Y. G. Lee, Y. I. Yang, S. S. Yum, B.-G. Kim, J. W. Cha, and A.-R. Ko, 2018: Microphysical characteristics of frozen droplet aggregates from deep convective clouds. Atmos. Chem. Phys., 18, 16915-16930, https://doi.org/10.5194/acp-18-16915-2018.
24. Park, S. S., Y. G. Lee, M. Kim, J. Kim, J. H. Koo, C. K. Kim, J. Um, and J. Yoon, 2019: Simulation of threshold UV exposure time for vitamin D synthesis in South Korea. Advances in Meteorology, vol. 2019, Article ID 4328151, 15 pages, https://doi.org/10.1155/2019/4328151.
25. Jung, C. H., J. Y. Lee, J. Um, S. S. Lee, Y. J. Yoon and Y. P. Kim, 2019: Estimation of source-based aerosol optical properties for polydisperse aerosols from receptor models. Appl. Sci., 9(7), 1443; doi: 10.3390/app9071443.
26. Lee, S. S., C.-H. Jung, S. Chiao, J. Um, Y.-S. Choi, and W. J. Choi, 2019: Comparison of simulations of updraft mass fluxes and their response to increasing aerosol concentration between a bin scheme and a bulk scheme in a deep-convective cloud system. Advances in Meteorology, vol. 2019, Article ID 9292535, 29 pages, https://doi.org/10.1155/2019/9292535.
27. Lawson, R. P., S. Woods, E. Jensen, E. Erfani, C. Gurganus, M. Gallagher, P. Connolly, J. Whiteway, A. J. Baran, P. May, A. Heymsfield, C. G. Schmitt, G. McFarquhar, J. Um, A. Protat, M. Bailey, S. Lance, A. Muhlbauer, J. L. Stith, A. Korolev, O. B. Toon, and M. Kr ̈amer, 2019: A review of ice particle shapes in cirrus formed in situ and anvils. J. Geophys. Res. Atmos., 124, https://doi.org/10.1029/2018JD030122.
28. Jung, C. H., Y. J. Yoon, J. Um, S. S. Lee, J. Y. Lee, S. Chiao, and Y. P. Kim, 2020: Approximation of most penetrating particle size for fibrous filters considering Cunningham slip correction factor. Environ. Eng. Res., 25(3), 439-445, https://doi.org/10.4491/eer.2019.058.
29. Lee, S. S., G. Kablick III, Z. Li, C.-H. Jung, Y.-S. Choi, J. Um, W. J. Choi, 2020: Examination of effects of aerosols on a pyroCb and their dependence on fire intensity and aerosol perturbation. Atmos. Chem. Phys., 20, 3357-3371, https://doi.org/10.5194/acp-20-3357-2020.
30. Um, J., S. Jang, Y. J. Yoon, S. S. Lee, J. Y. Lee, K. M. Han, W. J. Choi, Y. P. Kim, C.-H. Kim, and C. H. Jung, 2020: Mass extinction efficiency approximation for polydispersed aerosol using harmonic mean-type approximation. Appl. Sci., 10, 8637, https://doi.org/10.3390/app10238637.
31. Jung, C.H.,Y.J.Yoon,J.Um,S.S.Lee,K.M.Han,H.J.Shin,J.Y.Lee,andY.P.Kim, 2021: Approximated expression of the hygroscopic growth factor for polydispersed aerosols. J. Aerosol Sci., 151, 105670, https://doi.org/10.1016/j.jaerosci.2020.105670.
32. McFarquhar, G. M., C. Bretherton, R. Marchand, A. Protat, P. J. DeMott, S. P. Alexander, G. C. Roberts, C. H. Twohy, D. Toohey, S. Siems, Y. Huang, R. Wood, R. M. Rauber, S. Lasher- Trapp, J. Jensen, J. Stith, J. Mace, J. Um, E. Jarvinen, M. Schnaiter, A. Gettelman, K, J. Sanchez, C. S. McCluskey, L. M. Russell, I. L. McCoy, R. Atlas, C. G. Bardeen, K. A. Moore, T. C. J. Hill, R. S. Humphries, M. D. Keywood, Z. Ristovski, L. Cravigan, R. Schofield, C. Fairall, M. D. Mallet, S. M. Kreidenweis, B. Rainwater, J. D’Alessandro, Y. Wang, W. Wu, G. Saliba, E. J. T. Levin, S. Ding, F. Lang, S. C. H. Truong, C. Wolff, J. Haggerty, M. J. Harvey, A. Klekociuk, and A. McDonald, 2021: Observations of clouds, aerosols, precipitation, and surface radiation over the Southern Ocean: An overview of CAPRICORN, MARCUS, MICRE and SOCRATES. Bull. Amer. Meteor. Soc., 102, E894-E928, https://doi.org/10.1175/BAMS-D- 20-0132.1.
33. Lee, S. S., K.-J. Ha, M. G. Manoj, M. Kamruzzaman, H. Kim, N. Utsumi, Y. Zheng, B.-G. Kim, C. H. Jung, J. Um, J. Guo, K. O. Choi, and G.-U. Kim, 2021: Midlatitude mixed-phase stratocumulus clouds and their interactions with aerosols: how ice processes affect microphys- ical, dynamic, and thermodynamic development in those clouds and interactions?. Atmos. Chem. Phys., 21, 16843-16868, https://doi.org/10.5194/acp-21-16843-2021.
34. Jang S., J. Kim, G. M. McFarquhar, S. Park, S. S. Lee, C. H. Jung, S. S. Park, J. W. Cha, K. Lee, and J. Um, 2022: Theoretical calculations of directional scattering intensities of small nonspherical ice crystals: Implications for forward scattering probes. Remote Sensing, 14, 2795. https://doi.org/10.3390/rs14122795.
35. Jang S., J. Kim, G. M. McFarquhar, S. Park, S. Han, S. S. Lee, C. H. Jung, H. Jung, K.-H. Chang, W. Jung, and J. Um, 2022: The impacts of single-scattering and microphysical properties of ice particles smaller than 100 μm on the bulk radiative properties of tropical cirrus. Remote Sensing, 14, 3002. https://doi.org/10.3390/rs14133002.
36. Lee, S. S., J. Choi, G. Kim, K.-J. Ha, K.-H. Seo, C. H. Jung, J. Um, Y. Zheng, J. Guo, S.-K. Song, Y. G. Lee, and N. Utsumi, 2022: Examination of aerosol impacts on convective clouds and precipitation in two metropolitan areas in East Asia; how varying depths of convective clouds between the areas diversify those aerosol effects? Atmos. Chem. Phys., 22, 9059-9081, https://doi.org/10.5194/acp-22-9059-2022 .
37. Lee, S. S., J. Um, W. J. Choi, K.-J. Ha, C. H. Jung, J. Guo, and Y. Zheng, 2023: Impacts of an aerosol layer on a midlatitude continental system of cumulus clouds: how do these impacts depend on the vertical location of the aerosol layer? Atmos. Chem. Phys., 23, 273-286, https://doi.org/10.5194/acp-23-273-2023.
38. Jung, C. H., K. M. Han, Y. J. Yoon, D. Kim, J. Y. Lee, H.-M. Lee, J. Um, S. S. Lee, and Y. P. Kim, 2003: Parameterization of polydisperse aerosol optical properties during hygroscopic growth. Aerosol Sci. Tech., 57(8), 713-726, https://doi.org/10.1080/02786826.2023.2211121.
39. Jung, C. H., H.-M. Lee, D. Park, Y. J. Yoon, Y. Choi, J. Um, S. S. Lee, J. Y. Lee, and Y. P. Kim, 2023: Parameterization of below-cloud scavenging for polysidperse fine mode aerosol as a function of rain intensity. J. Env. Sci., 132, 43-55, https://doi.org/10.1016/j.jes.2022.07.031.
PEER-REVIEWED PUBLICATION (Domestic)
1. Um, J., 2020: Calculations of optical properties of cloud particles to improve the accuracy of forward scattering probes for in-situ aircraft cloud measurements. Atmosphere, 30(1), 75-89, https://doi.org/10.14191/Atmos.2020.30.1.075 (in Korean with English abstract).
2. Um, J., S. Jang, J. Kim, S. Park, H. Jung, S. Han, and Y. Lee, 2021: Calculations of the single-scattering properties of non-spherical ice crystals: Toward physically consistent cloud microphysics and radiation. Atmosphere, 31(1), 113-141, https://doi.org/10.14191/Atmos.2021.31.1.1 (in Korean with English abstract).
3. Jung, H. and Um, J., 2022: Calculations of surface PM2.5 concentrations using data from ceilometer backscatters and meteorological Variables. J. Env. Sci. Int., 31(1), 61-76, https://doi. org/10.5322/JESI.2022.31.1.61 (in Korean with English abstract).
4. Yum, S. S., K.-T. Lee, J.-J. Baik, G. Lee, S.-W. Kim, and J. Um, 2023: Historical development of research and publications in atmospheric physics field. Atmosphere, 33(2), 105-124, https://doi.org/10.14191/Atmos.2023.33.2.105 (in Korean with English abstract).
5. Han, S. and J. Um, 2023: Scavenging efficiency based on long-term characteristics of precipitation and particulate matters in Seoul, Korea. Atmosphere, 33(4), 367-385, https://doi.org/10.14191/Atmos.2023.33.4.367 (in Korean with English abstract).