Kyung-Sook Yun

Associate Research Fellow


Phone: +82-51-510-7692

Research Interests

  • Trans-basin SST variability
  • Climate variability
  • Monsoon-ENSO relationship


2010 Ph. D, Atmospheric Science, Pusan National University
2007 M. S., Atmospheric Sciences, Pusan National University
2005 B. S., Atmospheric Sciences, Pusan National University

Work Experience

2017 Present Assistant Research Fellow, IBS Center for Climate Physics
2015 2016 Research professor, Research Center for Climate Science, Pusan National University
2014 2015 Research professor, Pusan National University
2010 2017 Postdoctoral fellow, Pusan National University

Fellowships, Awards, and Honors

2012 Outstanding Achievement Academic Award for young atmospheric scientist, from President of Korean Meteorological Society


  1. Kyung-Sook Yun, June-Yi Lee, Axel Timmermann, Karl Stein, Malte F. Stuecker, John C. Fyfe, Eui-Seok Chung, 2021, Increasing ENSO-rainfall variability due to changes in future tropical temperature-rainfall relationship, Communications earth & environment, vol. 2, article number 43, DOI: 10.1038/s43247-021-00108-8
  2. Bin Wang, Michela Biasutti, Michael P. Byrne, Christopher Castro, Chih-Pei Chang, Kerry Cook, Rong Fu, Alice M. Crimm, Kyung-Ja Ha, Harry Hendon, Akio Kitoh, R. Krishnan, June-Yi Lee, Jianping Li, Jan Liu, Aurel Moise, Salvatore Pascale, M. K. Roxy, Anti Seth, Chung-Hsiung Sui, Andrew Turner, Song Yang, Kyung-Sook Yun, Lixia Zhang, and Tianjun Zhou, 2021,  Monsoon Climate Change Assessment, Bulletin of the American Meteorological Society, vol.102, 1, E1-E19, DOI:10.1175/BAMS-D-19-0335.1
  3. Kyung-Sook Yun, Axel Timmermann, and Malte F. Stuecker, 2021: Synchronized spatial shifts of Hadley and Walker circulations, Earth System Dynamics, vol. 12, 1, 121-132, DOI: 10.5194/esd-12-121-2021
  4. Christina Karamperidou, Malte F Stuecker, Axel Timmermann, Kyung-Sook Yun, Sun-Seon Lee, Fei‐Fei Jin, Agus Santoso, Michael J McPhaden, Wenju Cai, 2020: ENSO in a Changing Climate: Challenges, Paleo-Perspectives, and Outlook, El Niño Southern Oscillation in a Changing Climate 253, 473, ISBN: 978-1-119-54812-6, DOI: 10.1002/9781119548164.ch21.
  5. Jae-Hwi Yoo, Suyeon Moon, Kyung-Ja Ha, Kyung-Sook Yun, June-Yi Lee, 2020: Cases for the sole effect of the Indian Ocean Dipole in the rapid phase transition of the El Niño–Southern Oscillation, Theoretical and Applied Climatology, DOI: 10.1007/s00704-020-03265-6.
  6. Malte F Stuecker, Axel Timmermann, Fei-Fei Jin, Cristian Proistosescu, Sarah M. Kang, Doyeon Kim, Kyung-Sook Yun, Eui-Seok Chung, Jung-Eun Chu, Cecilia M. Bitz, Kyle C. Armour, and Michiya Hayashi, 2020: Strong remote control of future equatorial warming by off-equatorial forcing, Nature Climate Change, 10, 124-129, DOI: 10.1038/s41558-019-0667-6.
  7. Kyung-Sook Yun and Axel Timmermann, 2019: Calibration uncertainties of tropical Pacific climate reconstructions over the Last Millennium, Journal of Climate, DOI: 10.1175/JCLI-D-18-0524.1.
  8. Kyung-Sook Yun, Sang-Wook Yeh, and Kyung-Ja Ha, 2019: Underlying mechanisms leading to El Nino-to-La Nina transition are unchanged under global warming, Climate Dynamics, 52(3-4),1723-1738, DOI: 10.1007/s00382-018-4220-5.
  9. A Timmermann, S-I An, J-S Kug, F-F Jin, W Cai, A Capotondi, K Cobb, M Lengaigne, M J. McPhaden, M F. Stuecker, K Stein, A T. Wittenberg, K-S Yun, T Bayr, H-C Chen, Y Chikamoto, B Dewitte, D Dommenget, P Grothe, E Guilyardi, Y-G Ham, M Hayashi, S Ineson, D Kang, S Kim, WM Kim, J-Y Lee, T Li, J-J Luo, S McGregor, Y Planton, S Power, H Rashid, H-L Ren, A Santoso, K Takahashi, A Todd, G Wang, G Wang, R Xie, W-H Yang, S-W Yeh, J Yoon, E Zeller, X Zhang, 2018: El Niño–Southern Oscillation complexity, Nature, 559, 535-545, DOI: 10.1038/s41586-018-0252-6.
  10. Ye-Won Seo, Kyung-Sook Yun, June-Yi Lee, Yang-Won Lee, Kyung-Ja Ha, and Jong-Ghap Jhun, 2018 : Future changes due to model biases in probabilities of extreme temperatures over East Asia using CMIP5 data, International Journal of Climatology, 38, 1177-1188, DOI: 10.1002/joc.5233.
  11. Kyung-Sook Yun and Axel Timmermann, (2018) Decadal Monsoon-ENSO relationships re-examined,  Geophysical Research Letters, DOI: 10.1002/2017GL076912.
  12. Ha, Kyung-Ja, Jung-Eun Chu, Jun-Yi Lee, and Kyung-Sook Yun*, 2017: Interbasin coupling between the tropical Indian and Pacific Ocean on interannual timescale: Observation and CMIP5 reproduction, Climate Dynamics, 48, 459-475, DOI: 10.1007/s00382-016-3087-6.
  13. Yun, Kyung-Sook, Ye-Won Seo, Kyung-Ja Ha, June-Yi Lee, and Akio Kitoh, 2016: The seasonally varying effect of the Tibetan Plateau on Northern Hemispheric blocking frequency and amplitude, Climate Dynamics, 47(7), 2527-2541, DOI: 10.1007/s00382-016-2981-2.
  14. Yun, Kyung-Sook, S.-W. Yeh, and K.-J. Ha, 2016: Inter-El Niño variability in CMIP5 models: Model deficiencies and future changes, J. Geophys. Res. Atmos., 121, 3894–3906, DOI: 10.1002/2016JD024964.
  15. Chen, Wei, June-Yi Lee, Kyung-Ja Ha, Kyung-Sook Yun, and Riyu Lu, 2016: Intensification of the Western North Pacific anticyclone response to the short decaying El Nino event due to greenhouse warming. Journal of Climate, 29, 3607-3627, DOI: 10.1175/JCLI-D-15-0195.1.
  16. Yun, Kyung-Sook, Sang-Wook Yeh, Kyung-Ja Ha, 2015: Covariability of western tropical Pacific -North Pacific atmospheric circulation during summer. Nature Scientific Reports, DOI: 10.1038/srep16980. 5(16980).
  17. Yun, Kyung-Sook, Kyung-Ja Ha, Sang-Wook Yeh, Bin Wang, and Baoqiang Xiang, 2015: Critical role of boreal summer North Pacific subtropical highs in ENSO transition. Climate Dynamics, DOI: 10.1007/s00382-014-2193-6, 44(7),1979-1992.
  18. Seo, Ye-Won, Hojin Kim, Kyung-Sook Yun, June-Yi Lee, Kyung-Ja Ha, and Ja-Yeon Moon, 2014: Future change of extreme temperature climate indices over East Asia with uncertainties estimation in the CMIP5, Asia-Pacific Journal of Atmospheric Sciences, 50(1), 609-624, DOI: 10.1007/s13143-014-0050-5.
  19. Yun, Kyung-Sook, Ye-Won Seo, Kyung-Ja Ha, June-Yi Lee, and Yoshiyuki Kajikawa, 2014: Interdecadal changes in the Asian winter monsoon variability and its relationship with ENSO and AO. Asia-Pacific Journal of Atmospheric Sciences, 50(4), 531-540, DOI: 10.1007/s13143-014-0042-5.
  20. Yun, Kyung-Sook, Jun-Yi Lee, and Kyung-Ja Ha, 2014: Recent intensification of the South and East Asian monsoon contrast associated with an increase in the zonal tropical SST gradient, Journal of Geophysical Research, monsoon contrast associated with an increase in the zonal tropical SST gradient, Journal of Geophysical Research, 119(13), 8104-8116, DOI: 10.1002/2014JD021692.
  21. Heo, Ki-Young, Kyung-Ja Ha, Kyung-Sook Yun, Sun-Seon Lee, Hyung-Jin Kim and Bin Wang, 2014: Methods for Uncertainty Assessment of Climate Models and Model Predictions over East Asia, International Journal of Climatology, DOI: 10.1002/joc.3692, 34(2), 377–390.
  22. Yun, Kyung-Sook, Sang-Wook Yeh, and Kyung-Ja Ha, 2013: Distinct impact of tropical SSTs on summer North Pacific high and western North Pacific subtropical high, Journal of Geophysical Research – Atmospheres, 118, 4107-4116, DOI: 10.1002/jgrd.50253.
  23. Choi,Yumi, Kyung-Sook Yun, Kyung-Ja Ha, Kwang-Yul Kim, Soon-Jo Yoon, and Johnny C. L. Chan, 2013 : Effects of Asymmetric SST Distribution on Straight-moving Typhoon Ewiniar (2006) and Recurving Typhoon Maemi (2003), Monthly Weather Review, 141(11), 3950 – 3967, DOI: 10.1175/MWR-D-12-00207.1.
  24. Ha, Kyung-Ja, Ki-Young Heo, Sun-Seon Lee, Kyung-Sook Yun and Jong-Ghap Jhun, 2012: Variability in the East Asian Monsoon: a review, METEOROLOGICAL APPLICATIONS, DOI: 10.1002/met.1320, 19(2), 200-215.
  25. Yun, Kyung-Sook, Ki-Young Heo, Jung-Eun Chu, Kyung-Ja Ha, Eun-Jeong Lee, Yumi Choi and Akio Kitoh, 2012: Changes in Climate Classification and Extreme Climate Indices from a High-Resolution Future Projection, Asia-Pacific Journal of Atmospheric Sciences, doi: 10.1007/s13143-012-0022-6, 48(3), 213-226.
  26. Yun, Kyung-Sook, Johnny C. L. Chan, Kyung-Ja Ha, 2012: Effects of SST Magnitude and Gradient on Typhoon Tracks around East Asia: a case study for Typhoon Maemi (2003), Atmospheric Research, 109-110, 36-51, DOI:
  27. Ha, Kyung-Ja, and Kyung-Sook Yun, 2012: Climate Change Effects on Tropical Night Days in Seoul, Korea, Theoretical and Applied Climatology, 109(1),191-203, DOI: 10.1007/s00704-011-0573-y.
  28. Ha, Kyung-Ja, and Soon-Jo Yoon, Kyung-Sook Yun, Jong-Seong Kug, Yeon-Soo Jang, and Johnny C. L. Chan, 2012: Dependency of typhoon intensity and genesis locations on El Niño phase and SST shift over the Western North Pacific, Theoretical and Applied Climatology, 109(3), 383-395, DOI: 10.1007/s00704-012-0588-z.
  29. Yun, Kyung-Sook, Seong-Yeol Kim, Kyung-Ja Ha, and Masahiro Watanabe, 2011: Effects of sub-seasonal basic state changes on Rossby wave propagation during northern summer, Journal of Geophysical Research-Atmosphere, 116, DOI: 10.1029/2011JD016258.
  30. Yun, Kyung-Sook, K.-J. Ha, and B. Wang, 2010: Impacts of tropical ocean warming on East Asian summer climate. Geophysical Research Letters, 37, L20809, DOI: 10.1029/2010GL044931.
  31. Yun, Kyung-Sook, K.-H. Seo, and K.-J. Ha, 2010: Interdecadal change in the relationship between ENSO and the intraseasonal oscillation in East Asia, Journal of Climate, 23(13), 3599-3612, DOI: 10.1175/2010JCLI3431.1.
  32. Yun, Kyung-Sook, K.-J. Ha, B. Wang, and R. Ding, 2010: Decadal cooling in the Indian summer monsoon after 1997/1998 El Nino and its impact on the East Asian summer monsoon,  Geophysical Research Letters, 37, L01805, DOI: 10.1029/2009GL041539.
  33. Yun, Kyung-Sook, B. Ren, K.-J. Ha, J. C.L. Chan, and J.-G. Jhun, 2009: The 30-60 day Oscillation in the East Asian Summer Monsoon and its Time-dependent Association with the ENSO, Tellus, 61A, 565-578, DOI: 10.1111/j.1600-0870.2009.00410.x.
  34. Shin, S.-H., M. Kimoto, K.-J. Ha, and Kyung-Sook Yun, 2009: Impact of different diffusion schemes on simulated rainfall: Land-Ocean contrast, Journal of Geophysical Research, 114, D13101, DOI: 10.1029/2008JD011605.
  35. Ha, K.-J., Kyung-Sook Yun, J.-G. Jhun, and J. Li, 2009: Circulation changes associated with the interdecadal shift of Korean August rainfall around late 1960s, Journal of Geophysical Research, 114, D04115, DOI: 10.1029/2008JD011287.
  36. Yun, Kyung-Sook, S.-H. Shin, K.-J. Ha, A. Kitoh, and S. Kusunoki, 2008: East Asian Precipitation Change in the Global Warming Climate simulated by a 20-km mesh AGCM, Asia-Pacific Journal of Atmospheric Sciences, 44(3), 233-247.
  37. Yun, Kyung-Sook, K.-H. Seo, and K.-J. Ha, 2008: Relationship between ENSO and Northward Propagating Intraseasonal Oscillation in the East Asian Summer Monsoon System, Journal of Geophysical Research, 113, D14120, doi:10.1029/2008JD009901.