Ju-Mee Ryoo
Research Scientist/Engineer
Affiliation: Staff, NASA Ames Research Center (ARC), Instrument Management and Data Analysis, Bay Area
Environmental Research Institute (BAERI)
Branch: Atmospheric Science Branch (SGG)
Email: ju-mee.ryoo@nasa.gov
Phone: 650-604-0778
Professional Biography
Dr. Ju-Mee Ryoo is a Research Scientist affiliated with Atmospheric Science Branch at NASA Ames Research Center employed through the Science Technology Corporation.
Dr. Ryoo’s research interests encompass a broad range of topics, focusing on the understanding the impacts of atmospheric dynamics on extreme weather events, such as Rossby waves and Atmospheric Rivers (ARs). She employs a multidisciplinary approach, combining observational data from remote sensing, in-situ measurements, and reanalysis datasets with theories and models to investigate these phenomena across various spatial and temporal scales. Dr. Ryoo is also actively involved in studying the sources and transport processes of ozone, as well as investigating the complex interactions among greenhouse gases, aerosols, precipitation, and atmospheric circulations. Furthermore, her research delves into the compound interaction between ARs, vegetation, and wildfires, exploring the associated climate implications that arise from these interconnected factors.
Dr. Ryoo has participated in various NASA missions, including the Alpha Jet Atmospheric eXperiments (AJAX) projects, ObseRvations of Aerosols above CLouds and their intEractionS (ORACLEs), Dynamics and Chemistry of the Summer Stratosphere (DCOTSS), and the Asian Summer Monsoon Chemical & Climate Impact Project (ACCLIP) in a forecasting supporting role. Currently, she is involved in providing forecasting support for two ongoing missions: the Arctic Radiation-Cloud-Aerosol-Surface Interaction Experiment (ARCSIX) and The Plankton, Aerosol, Cloud, ocean Ecosystem Postlaunch Airborne eXperiment (PACE-PAX)
Education
Ph.D. Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, USA
M.A. Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, USA
M.S. Atmospheric Sciences, Yonsei University, Seoul, South Korea
B.S. Mathematics, Yonsei University, Seoul, South Korea
B.S. Atmospheric Sciences, Yonsei University, Seoul, South Korea
Research Interests
Atmospheric dynamics, climate variability, high impact & extreme weather (atmospheric rivers (ARs)), GHG emission estimate and processes, ozone sources and transport processes, air quality and human impact, meteorological impacts on aerosol transport and air quality, extreme weather – wildfire- ecosystem interaction, subseasonal and seasonal scales (S2S) prediction of extreme weather events.
Awards & Honors
- Certificate of Excellence award as an ObseRvation of Aerosols above CLouds and their intEractionS (ORACLES) participant, NASA Ames Contractor Council (2019)
- Best poster award in Convection Session, AGU Chapman Conference (2008)
- Gillman Fellowship, Johns Hopkins University (2004–2005)
Select Publications
Ryoo, J.-M. and T. Park, 2023: Contrasting characteristics of atmospheric rivers and their impacts on 2016 and 2020 wildfire seasons over the western United States, Environ. Res. Lett., 18, 074010, DOI 10.1088/1748-9326/acd948.
Chang, I., Gao, L., Flynn, C. J., Shinozuka, Y., Doherty, S. J., Diamond, M. S., Longo, K. M., Ferrada, G. A., Carmichael, G. R., Castellanos, P., da Silva, A. M., Saide, P. E., Howes, C., Xue, Z., Mallet, M., Govindaraju, R., Wang, Q., Cheng, Y., Feng, Y., Burton, S. P., Ferrare, R. A., LeBlanc, S. E., Kacenelenbogen, M. S., Pistone, K., Segal-Rozenhaimer, M., Meyer, K. G., Ryoo, J.-M., Pfister, L., Adebiyi, A. A., Wood, R., Zuidema, P., Christopher, S. A., and Redemann, J., 2023: On the differences in the vertical distribution of modeled aerosol optical depth over the southeastern Atlantic, Atmos. Chem. Phys., 23, 4283–4309, https://doi.org/10.5194/acp-23-4283-2023.
Ueyama, R., Schoeberl, M., Jensen, E. J., Pfister L., Park, M., Ryoo, J.-M., 2023: Convective impact on the global lower stratospheric water vapor budget, Journal of Geophysical Research – Atmospheres, https://doi.org/10.1029/2022JD037135, 128, 6, e2022JD037135.
Yates, E. L., Iraci, L. T., Kulawik, S. S., Ryoo, J.-M., Marrero, J. E., Parworth, C. L., St. Clair, J. M., Hanisco, T. F., Bui, T. P. V., Chang, C. S., and Dean-Day, J. M., 2023: An extensive database of airborne trace gas and meteorological observations from the Alpha Jet Atmospheric eXperiment (AJAX), Earth Syst. Sci. Data, 15, 2375–2389, https://doi.org/10.5194/essd-15-2375-2023.
Iraci, L. T., Parworth, C. L., Yates, E. L., Marrero, J. E., & Ryoo, J.-M., 2022: A collection of airborne measurements and analyses of trace gases emitted from multiple fires in California. Earth and Space Science, 9, e2021EA002116. https://doi.org/10.1029/2021EA002116
Ryoo, J.-M., Pfister, L., Ueyama, R., Zuidema, P., Wood, R., Chang, I., and Redemann, J., 2022: A meteorological overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) campaign over the southeastern Atlantic during 2016–2018, Part 2 – Daily and synoptic characteristics, Atmos. Chem. Phys., 22, 14209–14241, https://doi.org/10.5194/acp-22-14209-2022.
Ryoo, J.-M., Pfister, L., Ueyama, R., Zuidema, P., Wood, R., Chang, I., and Redemann, J., 2021: A meteorological overview of the ORACLES (ObseRvations of Aerosols above Clouds and their intEractionS) campaign over the southeastern Atlantic during 2016–2018, Part 1 – Climatology, Atmos. Chem. Phys, 21(22), 16689-16707. https://doi.org/10.5194/acp-21-16689-2021.
Liner, S., Ryoo, J.-M., and Chiao, S., 2022: On the relationship of arctic oscillation with atmospheric rivers and snowpack in the western United States using 40 years of multi-platform dataset, Water, 14(15), 2392; https://doi.org/10.3390/w14152392.
Pistone, K., Zuidema, P., Wood, R., Diamond, M., da Silva, A. M., Ferrada, G., Saide, P. E., Ueyama, R., Ryoo, J.-M., Pfister, L., Podolske, J., Noone, D., Bennett, R., Stith, E., Carmichael, G., Redemann, J., Flynn, C., LeBlanc, S., Segal-Rozenhaimer, M., and Shinozuka, Y., 2021: Exploring the elevated water vapor signal associated with the free tropospheric biomass burning plume over the southeast Atlantic Ocean, Atmos. Chem. Phys., 21, 9643–9668, https://doi.org/10.5194/acp-21-9643-2021.
Redemann, J., Wood, R., Zuidema, P., Doherty, S. J., Luna, B., LeBlanc, S. E., Diamond, M. S., Shinozuka, Y., Chang, I. Y., Ueyama, R., Pfister, L., Ryoo, J.-M., Dobracki, A. N., da Silva, A. M., Longo, K. M., Kacenelenbogen, M. S., Flynn, C. J., Pistone, K., Knox, N. M., Piketh, S. J., Haywood, J. M., Formenti, P., Mallet, M., Stier, P., Ackerman, A. S., Bauer, S. E., Fridlind, A. M., Carmichael, G. R., Saide, P. E., Ferrada, G. A., Howell, S. G., Freitag, S., Cairns, B., Holben, B. N., Knobelspiesse, K. D., Tanelli, S., L’Ecuyer, T. S., Dzambo, A. M., Sy, O. O., McFarquhar, G. M., Poellot, M. R., Gupta, S., O’Brien, J. R., Nenes, A., Kacarab, M., Wong, J. P. S., Small-Griswold, J. D., Thornhill, K. L., Noone, D., Podolske, J. R., Schmidt, K. S., Pilewskie, P., Chen, H., Cochrane, S. P., Sedlacek, A. J., Lang, T. J., Stith, E., Segal-Rozenhaimer, M., Ferrare, R. A., Burton, S. P., Hostetler, C. A., Diner, D. J., Seidel, F. C., Platnick, S. E., Myers, J. S., Meyer, K. G., Spangenberg, D. A., Maring, H., and Gao, L., 2021: An overview of the ORACLES (ObseRvations of Aerosols above CLouds and their intEractionS) project: aerosol–cloud–radiation interactions in the southeast Atlantic basin, Atmos. Chem. Phys., 21, 1507–1563, https://doi.org/10.5194/acp-21-1507-2021.
Ryoo, J.-M., S. Chiao, J. R. Spackman, L. T. Iraci, F. M. Ralph, A. Martin, R. M. Dole, J. E. Marrero, E. L. Yates, T. Paul Bui, J. M. Dean-Day, and C. S. Chang, 2020: Terrain Trapped Airflows and Precipitation Variability during an Atmospheric River, 355-375, J. Hydromet, 21, 355-375, https://doi.org/10.1175/JHM-D-19-0040.1.
Shinozuka, Y., Saide, P. E., Ferrada, G. A., Burton, S. P., Ferrare, R., Doherty, S. J., Gordon, H., Longo, K., Mallet, M., Feng, Y., Wang, Q., Cheng, Y., Dobracki, A., Freitag, S., Howell, S. G., LeBlanc, S., Flynn, C., Segal-Rosenhaimer, M., Pistone, K., Podolske, J. R., Stith, E. J., Bennett, J. R., Carmichael, G. R., da Silva, A., Govindaraju, R., Leung, R., Zhang, Y., Pfister, L., Ryoo, J.-M., Redemann, J., Wood, R., and Zuidema, P.: Modeling the smoky troposphere of the southeast Atlantic: a comparison to ORACLES airborne observations from September of 2016, Atmos. Chem. Phys., 20, 11491–11526, https://doi.org/10.5194/acp-20-11491-2020.
Langford, A.O., R. J. Alvarez II. J. Brioude, D. Caputi, S. A. Conley, S. Evan, I. C. Faloona, L. T. Iraci, G. Kirgis, J. E. Marrero, J.-M. Ryoo, C. J. Senff, and E.L. Yates, 2020: Ozone production in the Soberanes smoke haze: impact on air quality in the San Joaquin Valley during the California Baseline Ozone Transport Study, J. Geophys. Res., https://doi.org/10.1029/2019JD031777.
Yates, E.L., L.T. Iraci, L.W. Tarnay, J. D. Burley, C. Parworth, J.-M. Ryoo, 2020: The effect of an upwind non-attainment area on ozone in California’s Sierra Nevada Mountains, Atmos Environ, 230, https://doi.org/10.1016/j.atmosenv.2020.117426.
Leifer, I., C. Melton, R. Chatfield, X. Cui, M. L. Fischer, M. Fladeland, W. Gore, D. L. Hlavka, L. T. Iraci, J. Marrero, J.-M. Ryoo, T. Tanaka, E. Yates, J. E. Yorks, 2020: Air pollution inputs to the Mojave Desert by fusing surface mobile and airborne in situ and airborne and satellite remote sensing: A case study of interbasin transport with numerical model validation, Atmos. Environ., 224, 117184, https://doi.org/10.1016/j.atmosenv.2019.117184.
Ryoo, J.-M., L. T. Iraci, T. Tanaka, J. E. Marrero, E. L. Yates, I. Fung, Anna M. Michalak, Jovan Tadić, and W. Gore, T. Paul Bui, J. M. Dean-Day, C. S. Chang, 2019: Quantification of CO2 and CH4 emissions over Sacramento, California based on divergence theorem using aircraft measurement. Atmos. Meas. Tech., 12, 2949–2966, https://doi.org/10.5194/amt-12-2949-2019.
Faloona, I. C., S. Chiao, A. Eiserloh, R. J. Alvarez II, G. Kirgis, A. Langford, C. Senff, D. Caputi, A. Hu, L. T. Iraci, E. L. Yates, J. E. Marrero, J.-M. Ryoo, S. Conley, S. Tanrikulu, J. Xu, and T. Kuwayama, 2019: The California Baseline Ozone Transport Study (CABOTS), BAMS, https://doi.org/10.1175/BAMS-D-18-0302.1
Liu, C., S. Chiao, J.-M. Ryoo, 2019: Asian long-range transport in relation to atmospheric rivers in northern California, Atmosphere, 10, 313; https://doi.org/10.3390/atmos10060313
Ryoo, J.-M., M. S. Johnson, E. L. Yates, L. T. Iraci, R. B. Pierce, T. Tanaka, W. Gore, 2017: Investigating sources of ozone over California using AJAX airborne measurements and models: assessing the long-range transport, Atmos. Environ, 155, 53-67, http://dx.doi.org/10.1016/j.atmosenv.2017.02.008
Tadić, J., A. Michalak, L. Iraci, V. Ilić, S., Biraud, D. Feldman, B. Thaopaul, M. S. Johnson, M. Loewenstein, S. Jeong, M. Fischer, E. Yates, J.-M. Ryoo, 2017: Elliptic cylinder airborne sampling and geostatistical mass balance approach for quantifying local greenhouse gas emissions, Environ. Sci. Tech., 51 (17), 10012-10021, DOI: 10.1021/acs.est.7b03100
Yates, E. L., M. S. Johnson, L. T. Iraci, J.-M. Ryoo, B. J. Johnson, M. A. Ives, T. LeBlanc, M. S. Gustin, T. Tanaka, W. Gore, 2017: Western US tropospheric ozone: An assessment of vertical, seasonal and spatial variations over California and Nevada, J. of Geophys. Res.: Atmos., 122, https://doi.org/10.1002/2016JD026266
Ryoo, J.-M.,D. E. Waliser, D. W. Waugh, S. Wong, E. J. Fetzer, I. Fung, 2015:Classification of atmospheric river events on the U.S. west coast using a trajectory model., J. Geophys. Res. Atmos., 120, https://doi.org/10.1002/2014JD022023.
Ryoo, J.-M., Y. Kaspi, D. W. Waugh, G. N. Kiladis, D. E. Waliser, E. J. Fetzer, J. Kim, 2013: Impact of Rossby Wave Breaking on U.S. West Coast Winter Precipitation during ENSO Events. J. Climate, 26, 6360–6382, http://dx.doi.org/10.1175/JCLI-D-12-00297.1
Ryoo, J.-M., D. E. Waliser, and E. J. Fetzer, 2011: Trajectory analysis on the origin of air mass and moisture associated with atmospheric rivers over the West Coast of the United States, Atmos. Chem. Phys. Disc.
Ryoo, J.-M., T. Igusa, and D. W. Waugh, 2009: PDFs of Tropical Tropospheric Humidity: Measurements and Theory, J. Climate, 22, 3357-3373.
Ryoo, J.-M., D. W. Waugh, and A. Gettelman, 2008: Variability of subtropical upper tropospheric humidity, Atmos. Chem. Phys., 8, 1041-1067.
H.-Y. Chun, and J.-M. Ryoo, 2005: A Case Study of Dynamical Linkage Between the Troposphere and Stratosphere Associated with Stratospheric Major Sudden Warmings in 1979 and 1984, J. Korean. Meteorol. Soc., 41, 3, 415-430.
Ryoo, J.-M. and H.-Y. Chun, 2005: Stratospheric Major Sudden Warmings Revealed in NCEP Reanalysis Data for 41 years (1958-1999), J. Korean. Meteorol. Soc., 41, 2, 173-190.
Press Releases/Websites
Arctic Oscillation and its impact on atmospheric rivers and snowpack over California
https://www.nasa.gov/feature/president-biden-lands-at-nasa-ames-tours-california-storm-damage
Personal Research Website