Journal of the Korean earth science society (한국지구과학회지)

The Korean Earth Science Society (한국지구과학회)
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Two Overarching Teleconnection Mechanisms Affecting the Prediction of the 2018 Korean Heat Waves

  • Wie, Jieun (Division of Science Education & Institute of Fusion Science, Jeonbuk National University) ;
  • Moon, Byung-Kwon (Division of Science Education & Institute of Fusion Science, Jeonbuk National University)
  • Received : 2022.08.01
  • Accepted : 2022.08.28
  • Published : 2022.08.31
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Abstract

Given the significant social and economic impact caused by heat waves, there is a pressing need to predict them with high accuracy and reliability. In this study, we analyzed the real-time forecast data from six models constituting the Subseasonal-to-Seasonal (S2S) prediction project, to elucidate the key mechanisms contributing to the prediction of the recent record-breaking Korean heat wave event in 2018. Weekly anomalies were first obtained by subtracting the 2017-2020 mean values for both S2S model simulations and observations. By comparing four Korean heat-wave-related indices from S2S models to the observed data, we aimed to identify key climate processes affecting prediction accuracy. The results showed that superior performance at predicting the 2018 Korean heat wave was achieved when the model showed better prediction performance for the anomalous anticyclonic activity in the upper troposphere of Eastern Europe and the cyclonic circulation over the Western North Pacific (WNP) region compared to the observed data. Furthermore, the development of upper-tropospheric anticyclones in Eastern Europe was closely related to global warming and the occurrence of La Niña events. The anomalous cyclonic flow in the WNP region coincided with enhancements in Madden-Julian oscillation phases 4-6. Our results indicate that, for the accurate prediction of heat waves, such as the 2018 Korean heat wave, it is imperative for the S2S models to realistically reproduce the variabilities over the Eastern Europe and WNP regions.

Keywords

Acknowledgement

This work was supported by the Korea Meteorological Administration Research and Development Program under Grant KMI2020-01212 and the National Research Foundation of Korea (NRF) grant funded by the Government of Korea (MSIT) (No. 2022R1A2C1008858).

References

  1. Campbell, S., Remenyi, T.A., White, C.J., and Johnston, F.H., 2018, Heatwave and health impact research: A global review. Health & Place 53, 210-218. https://doi.org/10.1016/j.healthplace.2018.08.017
  2. Chae, Y. et al., 2020, 2020 Heat Impact Report. Korea Environment Institute, Sejong, Korea, 34 p. (in Korean)
  3. Ha, K.-J., Seo, Y.-W., Yeo, J.-H., Timmermann, A., Chung, E.-S., Franzke, C.L.E., Chan, J.C. L., Yeh, S.-W., and Ting, M.F., 2022, Dynamics and characteristics of dry and moist heatwaves over East Asia. NPJ Climate and Atmospheric Science, 5, 49, doi:10.1038/s41612-022-00272-4.
  4. Hsu, P.-C., Qian, Y., Liu, Y., Murakami, H., and Gao, Y., 2020, Role of abnormally enhanced MJO over the western Pacific in the formation and subseasonal predictability of record-breaking northeast Asian heatwave in the summer of 2018. Journal of Climate, 33, 3333-3349. https://doi.org/10.1175/JCLI-D-19-0337.1
  5. Kim, M.-K., Oh, J.-S., Park, C.-K., Min, S.-K., Boo, K.-O., and Kim, J.-H., 2019, Possible impact of the diabatic heating over the Indian subcontinent on heat waves in South Korea. International Journal of Climatology, 39, 1166-1180. https://doi.org/10.1002/joc.5869
  6. Kim, D.-W., Deo, R.C., Chung, J.-H., and Lee, J.-S., 2016, Projection of heat wave mortality related to climate change in Korea. Nature Hazards, 80, 623-637. https://doi.org/10.1007/s11069-015-1987-0
  7. Kim, H.-K., Moon, B.-K., Kim, M.-K., Park, J.-Y., and Hyun, Y.-K., 2021a, Three distinct atmospheric circulation patterns associated temperature extremes in South Korea. Scientific Reports, 11, 12911, doi:10.1038/s41598-021-92368-9.
  8. Kim, S.-W., Park, J., Kim, T., and Chae, Y., 2021b, Identification of heatwave hotspots in Seoul using high-resolution population mobility data. Urban Climate, 36, 100771, doi:10.1016/j.uclim.2021.100771
  9. Kosaka, Y., and Xie, S.-P., 2013, Recent global-warming hiatus tied to equatorial Pacific surface cooling. Nature, 501, 403-407. https://doi.org/10.1038/nature12534
  10. Medhaug, I., Stolpe, M.B., Fischer, E.M. Fischer, and Knutti, R., 2017, Reconciling controversies about the 'global warming hiatus'. Nature, 545, 41-47. https://doi.org/10.1038/nature22315
  11. Min, S.-K., Kim, Y.-H., Lee, S.-M., Sparrow, S., Li, S., Lott, F.C., and Stott, P.A., 2020, Quantifying human impact on the 2018 summer longest heat wave in South Korea. Bulletin of the American Meteorological Society, 101, S103-S108, doi:10.1175/Bams-D-19-0151.1.
  12. Shin, J., Olson, R., An, S.-I., 2018, Projected heat wave characteristics over the Korean Peninsula during the twenty-first century. Asia-Pacific Journal of Atmospheric Sciences, 54, 53-61. https://doi.org/10.1007/s13143-017-0059-7
  13. Son, J.-Y., Lee, J.-T., Anderson, G. B., and Bell, M.L., 2012, The impact of heat waves on mortality in seven major cities in Korea. Environmental Health Perspectives, 120, 566-571. https://doi.org/10.1289/ehp.1103759
  14. Stocker, T.F. et al., 2013, Climate change 2013: the physical science basis. In Intergovernmental Panel on Climate Change, Working Group I Contribution to the IPCC Fifth Assessment Report (AR5). New York, NY: Cambridge University Press.
  15. Wie, J., Moon, B.-K., Kim, K.-Y., and Lee, J., 2014, The global warming hiatus simulated in HadGEM2-AO based on RCP8.5. Journal of the Korean earth science society, 35, 249-258. (in Korean) https://doi.org/10.5467/JKESS.2014.35.4.249
  16. Wie, J., Moon, B.-K., Hyun, Y.-K., and Lee, J., 2021, Impact of local atmospheric circulation and sea surface temperature of the East Sea (Sea of Japan) on heat waves over the Korean Peninsula. Theoretical and Applied Climatology, 144, 431-446. https://doi.org/10.1007/s00704-021-03546-8
  17. Xu, Z.W., FitzGerald, G., Guo, Y. M., Jalaludin, B., and Tong, S.L., 2016, Impact of heatwave on mortality under different heatwave definitions: A systematic review and meta-analysis. Environment International, 89-90, 193-203. https://doi.org/10.1016/j.envint.2016.02.007
  18. Yan, X.-H., Boyer, T., Trenberth, K., Karl, T.R., Xie, S.-P., Nieves, V., Tung, K.-K., and Roemmich, D., 2016, The global warming hiatus: Slowdown or redistribution? Earth's Future, 4, 472-482. https://doi.org/10.1002/2016EF000417
  19. Yeh, S.-W., Won, Y.-J., Hong, J.-S., Lee, K.-J., Kwon, M., Seo, K.-H., and Ham, Y.-G., 2018, The record-breaking heat wave in 2016 over South Korea and its physical mechanism. Monthly Weather Review, 146, 1463-1474. https://doi.org/10.1175/MWR-D-17-0205.1
  20. Yeo, S.-R., Yeh, S.-W., and Lee, W.-S., 2019, Two types of heat wave in Korea associated with atmospheric circulation pattern. Journal of Geophysical Research: Atmosphere, 124, 7498-7511. https://doi.org/10.1029/2018JD030170
  21. Yi., C., Kwon, H.-G., Yang, H., 2022, Spatial temperature differences in local climate zones of Seoul metropolitan area during a heatwave. Urban climate, 41, 101012.
  22. Yoon, D., Cha, D.-H., Lee, G., Park, C., Lee, M.-I., and Min, K.-H., 2018, Impacts of synoptic and local factors on heat wave events over southeastern region of Korea in 2015. Journal of Geophysical Research Atmospheres 123, 12081-12096. https://doi.org/10.1029/2018JD029247