Publications

47. Park, K, J.-J. Baik, and Y.-H. Ryu, 2026: Evaluating the importance of street trees and their parameters for urban canopy model performance: Model updates and machine learning. Urban Climate, accepted.

46. Zhang, Q., Y. Wang, M. Liu, Y.-H. Ryu, M. Liu, H. Li, S. Wei, J. Liu, S. Tao, X. Wang, 2026: Underestimation of particulate dry nitrogen deposition in China. Nature Geoscience, https://doi.org/10.1038/s41561-025-01873-3.

45. Kioutsioukis, I., C. Hogrefe, P. A. Makar, U. Alyuz, J. Bash, R. Bellasio, R. Bianconi, T. Buttler, O. E. Clifton, P. Cheung, A. Hodzic, R. Kranenburg, A. Lupascu, K. Momoh, J. L. Perez Camano, J. Pleim, Y.-H. Ryu, R. San Jose, D. Schwede, R. Sokhi, and S. Galmarini, 2025: Operational and Probabilistic Evaluation of AQMEII-4 Regional Scale Ozone Dry Deposition. Time to Harmonise Our LULC Masks. Atmospheric Chemistry and Physics, 25, 12923–12953, https://doi.org/10.5194/acp-25-12923-2025.

44. Kwon, D., G.-Y. Seo, S.-K. Min, S.-W. Son, Y.-H. Ryu, E.-S. Im, D.-H. Cha, J.-U. Kim, Y.-H. Byun, and K.-O. Boo, 2025: Synoptic systems influence the effectiveness of spectral nudging in high-resolution simulations of extreme precipitation. npj Climate and Atmospheric Science,  8, 339, https://doi.org/10.1038/s41612-025-01224-4.

43. Hogrefe, C., S. Galmarini, P. A. Makar, I. Kioutsioukis, O. E. Clifton, U. Alyuz, J. O. Bash, R. Bellasio, R. Bianconi, T. Butler, P. Cheung, A. Hodzic, R. Kranenburg, A. Lupascu, K. Momoh, J. L. Perez-Camanyo, J. E. Pleim, Y.-H. Ryu, R. San Jose, M. Schaap, D. B. Schwede, and R. Sokhi, 2025:  A Diagnostic Intercomparison of Modeled Ozone Dry Deposition Over North America and Europe Using AQMEII4 Regional-Scale Simulations. Atmospheric Chemistry and Physics, 25, 12629–12656, https://doi.org/10.5194/acp-25-12629-2025. 

42. Makar, P. A., P. Cheung, C. Hogrefe, A. Akingunola, U. Alyuz-Ozdemir, J. O. Bash, M. D. Bell, R. Bellasio, R. Bianconi, T. Butler, H. Cathcart, O. E. Clifton, A. Hodzic, I. Koutsioukis, R. Kranenburg, A. Lupascu, J. A. Lynch, K. Momoh, J. L. Perez-Camanyo, J. Pleim, Y.-H. Ryu, R. San Jose, D. Schwede, T. Scheuschner, M. Shephard, R. Sokhi, and S. Galmarini: Critical Load Exceedances for North America and Europe using an Ensemble of Models and an Investigation of Causes for Environmental Impact Estimate Variability: An AQMEII4 Study. Atmospheric Chemistry and Physics, 25, 3049–3107, https://doi.org/10.5194/acp-25-3049-2025.

41. Ryu, Y.-H., S. Kim, M.-S. Park, J. Lee, J. Kim, and M. Kang, 2025: Online coupling of an urban canopy model with trees and a mesoscale atmospheric model to assess the cooling effects of trees under different urban configurations and varying soil dryness. Sustainable Cities and Society, 121, 106226, https://doi.org/10.1016/j.scs.2025.106226.

40. Ryu, Y.-H., S.-K. Min, 2024: Leveraging physics-based and explainable machine learning approaches to quantify the relative contributions of rain and air pollutants to wet deposition. Science of the Total Environment, 931, 172980, https://doi.org/10.1016/j.scitotenv.2024.172980.

39. Ryu, Y.-H., S.-K. Min, 2024: Anthropogenic warming degrades spring air quality in Northeast Asia by enhancing atmospheric stability and transboundary transport. npj Climate and Atmospheric Science, 7, 50, https://doi.org/10.1038/s41612-024-00603-7

38. Ha, S., R. Kumar, G. Pfister, Y. Lee, D. Lee, H. M. Kim, and Y.-H. Ryu, 2024: Chemical data assimilation with aqueous chemistry in WRF-Chem coupled with WRFDA (V4.4.1). Journal of Advances in Modeling Earth Systems, 16, e2023MS003928. https://doi.org/10.1029/2023MS003928

37. Park, B.-J., S.-K. Min, and Y.-H. Ryu, 2022: Inter-model differences in future summer onset over the northern high latitudes. Geophysical Research Letters, 49, e2022GL100739. https://doi.org/10.1029/2022GL100739

36. Ryu, Y.-H., and S.-K. Min, 2022: Greenhouse warming and anthropogenic aerosols synergistically reduce springtime rainfall in low-latitude East Asia. npj Climate and Atmospheric Science, 5, 69. https://doi.org/10.1038/s41612-022-00295-x

35. Ryu, Y.-H., S.-K. Min, and C. Knote, 2022: Contrasting roles of clouds as a sink and source of aerosols: A quantitative assessment using WRF-Chem over East Asia. Atmospheric Environment, 277, 119073. https://doi.org/10.1016/j.atmosenv.2022.119073.

34. Ryu, Y.-H. and S.-K. Min, 2022: Improving wet and dry deposition of aerosols in WRF-Chem: Updates to below-cloud scavenging and coarse-particle dry deposition. Journal of Advances in Modeling Earth Systems, 14, e2021MS002792. https://doi.org/10.1029/2021MS002792.

33. Ryu, Y.-H., S.-K. Min, and C. Knote, 2022: Role of upwind precipitation in transboundary pollution and secondary aerosol formation: A case study during the KORUS-AQ field campaign. Journal of Applied Meteorology and Climatology, 61, 159–174. https://doi.org/10.1175/JAMC-D-21-0162.1.

32. Galmarini, S., P. Makar, O. Clifton, C. Hogrefe, J. Bash, R. Bianconi, R. Bellasio, J. Bieser, T. Butler, J. Ducker, J. Flemming, A. Hozdic, C. Holmes, I. Kioutsioukis, R. Kranenburg, A. Lupascu, J. L. Perez-Camanyo, J. Pleim, Y.-H. Ryu, R. San Jose, D. Schwede, S. Silva, M. Garcia Vivanco, and R. Wolke, 2021: Technical note – AQMEII4 activity 1: Evaluation of wet and dry deposition schemes as an integral part of regional-scale air quality models. Atmospheric Chemistry and Physics, 21, 15663–15697. https://doi.org/10.5194/acp-21-15663-2021

31. Ryu, Y.-H., S.-K. Min, and A. Hodzic, 2021: Recent decreasing trends in surface PM2.5 over East Asia in the winter-spring season: Different responses to emissions and meteorology between upwind and downwind regions. Aerosol and Air Quality Research, 21, 200654. https://doi.org/10.4209/aaqr.200654

30. Wang, C., Z.-H. Wang, and Y.-H. Ryu, 2021: A single-layer urban canopy model with transmissive radiation exchange between trees and street canyons. Building and Environment, 191, 107593. https://doi.org/10.1016/j.buildenv.2021.107593

29. Ryu, Y.-H., S.-K. Min, 2021: Long-term evaluation of atmospheric composition reanalyses from CAMS, TCR-2, and MERRA-2 over South Korea: Insights into applications, implications, and limitations. Atmospheric Environment, 246, 118062. https://doi.org/10.1016/j.atmosenv.2020.118062

28. Ryu, Y.-H., S.-K. Min, 2020: What matters in public perception and awareness of air quality? Quantitative assessment using internet search volume data. Environmental Research Letters, 15, 0940b4. https://doi.org/10.1088/1748-9326/ab9fb0

27. Ryu, Y.-H., A. Hodzic, G. Descombes, M. Hu, and J. Barre, 2019: Towards a better regional ozone forecast over CONUS using rapid data assimilation of clouds and meteorology in WRF-Chem. Journal of Geophysical Research–Atmospheres, 124, 13576–13592.  https://doi.org/10.1029/2019JD031232

26. Ryu, Y.-H., A. Hodzic, J. Barre, G. Descombes, and P. Minnis, 2018: Quantifying errors in surface ozone predictions associated with clouds over CONUS: A WRF-Chem modeling study using satellite cloud retrievals. Atmospheric Chemistry and Physics, 18, 7509–7525. https://doi.org/10.5194/acp-18-7509-2018

25. Ryu, Y.-H., A. Hodzic, G. Descombes, S. Hall, P. Minnis, D. Spangenberg, K. Ullmann, and S. Madronich, 2017: Improved modeling of cloudy-sky actinic flux using satellite cloud retrievals. Geophysical Research Letters, 44, 1592–1600.  https://doi.org/10.1002/2016GL071892

24. Ryu, Y.-H., J. A. Smith, M. L. Baeck, L. Cunha, E. Bou-Zeid, and W. Krajewski, 2016: The regional water cycle and heavy spring rainfall in Iowa: Observational and modeling analyses from the IFloodS campaign. Journal of Hydrometeorology, 17, 2763–2784. https://doi.org/10.1175/JHM-D-15-0174.1

23. Ryu, Y.-H., E. Bou-Zeid, Z. Wang, and J. A. Smith, 2016: Realistic representation of trees in an urban canopy model. Boundary-Layer Meteorology, 159, 193–220. https://doi.org/10.1007/s10546-015-0120-y

22. Ryu, Y.-H., J. A. Smith, E. Bou-Zeid, and M. L. Baeck, 2016: The influence of land-surface heterogeneities on heavy convective rainfall in the Washington-Baltimore metropolitan area. Monthly Weather Review, 144, 553–573. https://doi.org/10.1175/MWR-D-15-0192.1

21. Ryu, Y.-H., J. A. Smith, and E. Bou-Zeid, 2015: On the climatology of precipitable water and water vapor flux in the mid-Atlantic region of the US. Journal of Hydrometeorology, 16, 70–87. https://doi.org/10.1175/JHM-D-14-0030.1

20. Ganbat, G., J.-J. Baik, and Y.-H. Ryu, 2015: A numerical study of the interactions of urban breeze circulation with mountain slope winds. Theoretical and Applied Climatology, 120, 123–135. https://doi.org/10.1007/s00704-014-1162-7

19. Kwak, K.-H., J.-J. Baik, Y.-H. Ryu, and S.-H. Lee, 2015: Urban air quality simulation in a high-rise building area using a CFD model coupled with mesoscale meteorological and chemistry-transport models. Atmospheric Environment, 100, 167−177. https://doi.org/10.1016/j.atmosenv.2014.10.059

18. Lee, K.-Y., K.-H. Kwak, Y.-H. Ryu, S.-H. Lee, and J.-J. Baik, 2014: Impacts of biogenic isoprene emission on ozone air quality in the Seoul metropolitan area. Atmospheric Environment, 96, 209−219. https://doi.org/10.1016/j.atmosenv.2014.07.036

17. Ryu, Y.-H., J.-J. Baik, and S.-H. Lee, 2013: Effects of anthropogenic heat on ozone air quality in a megacity. Atmospheric Environment, 80, 20−30. https://doi.org/10.1016/j.atmosenv.2013.07.053

16. Ganbat, G., J.-Y. Han, Y.-H. Ryu, and J.-J. Baik, 2013: Characteristics of the urban heat island in a high-altitude metropolitan city, Ulaanbaatar, Mongolia. Asia-Pacific Journal of Atmospheric Sciences, 49, 535−541. https://doi.org/10.1007/s13143-013-0047-5

15. Park, S.-B., J.-J. Baik, and Y.-H. Ryu, 2013: A large-eddy simulation study of bottom-heating effects on scalar dispersion in and above a cubical building array. Journal of Applied Meteorology and Climatology, 52, 1738−1752. https://doi.org/10.1175/JAMC-D-12-0255.1

14. Ryu, Y.-H., J.-J. Baik, and J.-Y. Han, 2013: Daytime urban breeze circulation and its interaction with convective cells. Quarterly Journal of the Royal Meteorological Society, 139, 401–413. https://doi.org/10.1002/qj.1973

13. Ryu, Y.-H., and J.-J. Baik, 2013: Daytime local circulations and their interactions in the Seoul metropolitan area. Journal of Applied Meteorology and Climatology, 52, 784−801. https://doi.org/10.1175/JAMC-D-12-0157.1

12. Ryu, Y.-H., J.-J. Baik, K.-H. Kwak, S. Kim, and N. Moon, 2013: Impacts of urban land-surface forcing on ozone air quality in the Seoul metropolitan area. Atmospheric Chemistry and Physics, 13, 2177−2194. https://doi.org/10.5194/acp-13-2177-2013

11. Ryu, Y.-H., J.-J. Baik, and S.-H. Lee: Performance comparison of an urban canopy model under different meteorological conditions. Atmosphere (Korean Journal), 22, 428−436, 2012. https://doi.org/10.14191/Atmos.2012.22.4.429

10. Koo, H.-J., and Y.-H. Ryu: Impacts of anthropogenic heating on urban boundary layer in the Gyeong-In region. Journal of Environmental Impact Assessment (Korean Journal), 21, 665−681, 2012. https://doi.org/10.14249/eia.2012.21.5.665

9. Baik, J.-J., K.-H. Kwak, S.-B. Park, and Y.-H. Ryu, 2012: Effects of building roof greening on air quality in street canyons. Atmospheric Environment, 61, 48−55. https://doi.org/10.1016/j.atmosenv.2012.06.076

8. Ryu, Y.-H., and J.-J. Baik, 2012: Quantitative analysis of factors contributing to urban heat island intensity. Journal of Applied Meteorology and Climatology, 51, 842−854. https://doi.org/10.1175/JAMC-D-11-098.1

7. Kwak, K.-H., J.-J. Baik, S.-H. Lee, and Y.-H. Ryu, 2011: Computational fluid dynamics modelling of the diurnal variation of flow in a street canyon. Boundary-Layer Meteorology, 141, 77−92. https://doi.org/10.1007/s10546-011-9630-4

6. Ryu, Y.-H., J.-J. Baik, and S.-H. Lee, 2011: A new single-layer urban canopy model for use in mesoscale atmospheric models. Journal of Applied Meteorology and Climatology, 50, 1773−1794. https://doi.org/10.1175/2011JAMC2665.1

5. Kwak, K.-H., Y.-H. Ryu, and J.-J. Baik, 2011: Temporal and spatial variations of NOx and ozone concentrations in Seoul during the solar eclipse of 22 July 2009. Journal of Applied Meteorology and Climatology, 50, 500−506. https://doi.org/10.1175/2010JAMC2561.1

4. Grimmond, C. S. B., M. Blackett, M. J. Best, J.-J. Baik, S. E. Belcher, J. Beringer, S. I. Bohnenstengel, I. Calmet, F. Chen, A. Coutts, A. Dandou, K. Fortuniak, M. L. Gouvea, R. Hamdi, M. Hendry, M. Kanda, T. Kawai, Y. Kawamoto, H. Kondo, E. S. Krayenhoff, S.-H. Lee, T. Loridan, A. Martilli, V. Masson, S. Miao, K. Oleson, R. Ooka, G. Pigeon, A. Porson, Y.-H. Ryu, F. Salamanca, G. J. Steeneveld, M. Tombrou, J. A. Voogt, D. T. Young, and N. Zhang, 2011: Initial results from Phase 2 of the international urban energy balance model comparison. International Journal of Climatology, 31, 244−272. https://doi.org/10.1002/joc.2227

3. Grimmond, C. S. B., M. Blackett, M. J. Best, J. Barlow, J.-J. Baik, S. E. Belcher, S. I. Bohnenstengel, I. Calmet, F. Chen, A. Dandou, K. Fortuniak, M. L. Gouvea, R. Hamdi, M. Hendry, T. Kawai, Y. Kawamoto, H. Kondo, E. S. Krayenhoff, S.-H. Lee, T. Loridan, A. Martilli, V. Masson, S. Miao, K. Oleson, G. Pigeon, A. Porson, Y.-H. Ryu, F. Salamanca, L. Shashua-Bar, G.-J. Steeneveld, M. Tombrou, J. Voogt, D. Young, and N. Zhang, 2010: The international urban energy balance models comparison project: First results from phase 1. Journal of Applied Meteorology and Climatology, 49, 1268−1292. https://doi.org/10.1175/2010JAMC2354.1

2. Tang, W, G. Haller, J.-J. Baik, and Y.-H. Ryu, 2009: Locating an atmospheric contamination source using slow manifolds. Physics of Fluids, 21, 043302. https://doi.org/10.1063/1.3115065

1. Ryu, Y.-H., and J.-J. Baik, 2009: Flow and dispersion in an urban cubical cavity. Atmospheric Environment, 43, 1721−1729. https://doi.org/10.1016/j.atmosenv.2008.12.013