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Korean Meteorological Society (한국기상학회)
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A Numerical Simulation Study of a Heavy Rainfall Event over Daegwallyeong on 31 July 2014

2014년 7월 31일 대관령에서 발생한 집중호우에 관한 수치모의 연구

  • Choi, Seung-Bo (Department of Atmospheric & Environmental Sciences, Gangneung-Wonju National University) ;
  • Lee, Jae Gyoo (Department of Atmospheric & Environmental Sciences, Gangneung-Wonju National University)
  • 최승보 (강릉원주대학교 대기환경과학과) ;
  • 이재규 (강릉원주대학교 대기환경과학과)
  • Received : 2015.12.29
  • Accepted : 2016.03.07
  • Published : 2016.03.31
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Abstract

On 31 July 2014, there was a localized torrential rainfall ($58.5mm\;hr^{-1}$) caused by a strong convective cell with thunder showers over Daegwallyeong. In the surface synoptic chart, a typhoon was positioned in the East China Sea and the subtropical high was expanded to the Korean peninsula. A WRF (Weather Research and Forecasting) numerical simulation with a resolution of 1 km was performed for a detailed analysis. The simulation result showed a similar pattern in a reflectivity distribution particularly over the Gangwon-do region, compared with the radar reflectivity. According to the results of the WRF simulation, the process and mechanism of the localized heavy rainfall over Daegwallyeong are as follows: (1) a convective instability over the middle part of the Korean peninsula was enhanced due to the low level advection of warm and humid air from the North Pacific high. (2) There was easterly flow from the coast to the mountainous regions around Daegwallyeong, which was generated by the differential heating of the insolation among Daegwallyeong and the Yeongdong coastal plain, and nearby coastal waters. (3) In addition, westerly flow from the western part of Daegwallyeong caused a strong convergence in this region, generating a strong upward motion combined by an orographic effect. (4) This brought about a new convective cell over Daegwallyeong. And this cell was more developed by the outflow from another thunderstorm cell to the south, and finally these two cells were merged to develop as a strong convective cell with thunder showers, leading to the record breaking maximum rainfall per hour ($58.5mm\;hr^{-1}$) in July.

Keywords

References

  1. Ahrens, C. D., 2012: Meteorology Today: An Introduction to Weather, Climate, and the Environment. 10th ed. Brooks/Cole, 384 pp.
  2. Atkins, N. T., and R. M. Wakimoto, 1995: Observations of the Sea-Breeze Front during CaPE. Part II: Dual-Doppler and Aircraft Analysis. Mon. Wea. Rev., 123, 944-969. https://doi.org/10.1175/1520-0493(1995)123<0944:OOTSBF>2.0.CO;2
  3. Burpee, R. W., 1979: Peninsula-Scale Convergence in the South Florida Sea Breeze. Mon. Wea. Rev., 107, 852-860. https://doi.org/10.1175/1520-0493(1979)107<0852:PSCITS>2.0.CO;2
  4. Byers, H. R., and H. R. Rodebush, 1948: Causes of Thunderstorms of the Florida Peninsula, J. Meteor., 5, 275-280. https://doi.org/10.1175/1520-0469(1948)005<0275:COTOTF>2.0.CO;2
  5. Byers, H. R., and R. R. Braham, Jr., 1949: The thunderstorm. US Dept of Commerce, 287 pp.
  6. Chen, F., and J. Dudhia, 2001: Coupling an advanced land surface-hydrology model with the penn state-NCAR MM5 modeling system. Part I: Model implementation and sensitivity. Mon. Wea. Rev., 129, 569-585. https://doi.org/10.1175/1520-0493(2001)129<0569:CAALSH>2.0.CO;2
  7. Chiba, O., 1993: The turbulent characteristics in the lowest part of the sea breeze front in the atmospheric surface layer. Bound.-Layer Meteor., 65, 181-195. https://doi.org/10.1007/BF00708823
  8. Chishom, A. J., and J. H. Renick, 1972: The kinematics of multicell and supercell Alberta hailstorms. Alberta Hail Studies, Research Council of Alberta Hail Studies, Rep. 72-2, Edomoton, Canada, 24-31.
  9. Choi, H.-Y., J.-H. Ha, D.-K. Lee, and Y.-H. Kuo, 2011: Analysis and simulation of mesoscale convective systems accompanying heavy rainfall: The Goyang case. Asia-Pac. J. Atmos. Sci., 47, 265-279. https://doi.org/10.1007/s13143-011-0015-x
  10. Choi, J.-W., and J.-G. Lee, 2015: A sensitivity study of WRF model simulations to nudging methods for A Yeongdong heavy snowfall event. Atmosphere, 25, 99-115 (in Korean with English abstract). https://doi.org/10.14191/Atmos.2015.25.1.099
  11. Chung, K.-B., J.-Y. Kim, and T.-Y. Kwon, 2004: Characteristics of lower-tropospheric wind related with winter precipitation in the Yeongdong region. J. Korean Meteor. Soc., 40, 369-380 (in Korean with English abstract).
  12. Colle, B. A., and C. F. Mass, 2000: The 5-9 February 1996 flooding event over the pacific northwest: Sensitivity studies and evaluation of the MM5 precipitation forecasts. Mon. Wea. Rev., 128, 593-617. https://doi.org/10.1175/1520-0493(2000)128<0593:TFFEOT>2.0.CO;2
  13. Fujita, T. T., 1978: Manual of downburst identification for Project NIMROD. SMRP Res. Pap. No. 156, 111 pp.
  14. Gentry, R. C., and P. L. Moore, 1954: Relation of local and general wind interaction near the sea coast to time and location of air-mass showers, J. Meteor., 11, 507-511. https://doi.org/10.1175/1520-0469(1954)011<0507:ROLAGW>2.0.CO;2
  15. Hanley, K. E., D. J. Kirshbaum, S. E. Belcher, N. M. Roberts, and G. Leoncini, 2011: Ensemble predictability of an isolated mountain thunderstorm in a high-resolution model. Quart. J. Roy. Meteor. Soc., 137, 2124-2137. https://doi.org/10.1002/qj.877
  16. Heo, B.-H., K.-E. Kim, and K.-D. Min, 1994: Synoptic thermodynamic characteristics of air mass thunderstorms occurring in the middle region of South Korea during the summer. J. Korean Meteor. Soc., 30, 49-63 (in Korean with English abstract).
  17. Hong, S. Y., and Y. Noh, 2006: A new vertical diffusion package with an explicit treatment of entrainment processes. Mon. Wea. Rev., 134, 2318-1611. https://doi.org/10.1175/MWR3199.1
  18. Iacono, M. J., J. S. Delamere, E. J. Mlawer, M. W. Shephard, S. A. Clough, and W. D. Collins, 2008: Radiative forcing by long-lived greenhouse gases: Calculations with the AER radiative transfer models. J. Geophys. Res., 113, D13103, doi:10.1029/2008JD009944.
  19. Jeon, B.-I., Y.-K. Kim, and H.-W. Lee, 1994: The influences of sea breeze on air pollution concentraion in Pusan, Korea. J. Korean Env. Sci. Soc., 3, 357-365 (in Korean with English abstract).
  20. Kain, J. S., 2004: The Kain-Fritsch convective parameterization: An update. J. Applied. Meteor., 43, 170-181. https://doi.org/10.1175/1520-0450(2004)043<0170:TKCPAU>2.0.CO;2
  21. Kim, D.-K., and H.-Y. Chun, 2000: A numerical study of the orographic effects associated with a heavy rainfll event. J. Korean Meteor. Soc., 36, 441-454 (in Korean with English abstract).
  22. Kim, K.-E., and H.-R. Lee, 1994: Development mechanism of summertime air mass thunderstorm occurred in Kwangju area. J. Korean Meteor. Soc., 30, 597-613 (in Korean with English abstract).
  23. Kim, Y.-H., and J.-J. Baik, 2007: Structure and evolution of a numerically simulated thunderstorm outflow. J. Korean Earth Sci. Soc., 28, 857-870 (in Korean with English abstract). https://doi.org/10.5467/JKESS.2007.28.7.857
  24. KMA, 2014: Climate Analysis on July 2014. Korea Meteorological Adminstration, 5 pp (in Korean).
  25. Lim, K.-S. S., and S. Y. Hong, 2010: Development of an effective double-moment cloud microphysics scheme with prognostic cloud condensation nuclei (CCN) for weather and climate models. Mon. Wea. Rev., 138, 1587-1611. https://doi.org/10.1175/2009MWR2968.1
  26. Lee, H., and T.-Y. Lee, 1994: The governing factors for heavy snowfalls in Youngdong area. J. Korean Meteor. Soc., 30, 197-218 (in Korean with English abstract).
  27. Lee, J.-G., 1999: Synoptic structure causing the difference in obseved snowfall amount at Taegwallyong and Kangnung: Case study. J. Korean Meteor. Soc., 35, 319-334 (in Korean with English abstract).
  28. Lee, J.-G., and Y.-J. Kim, 2009: A numerical case study examining the orographic effect of the northern mountain complex on snowfall distribution over the Yeongdong region. Atmosphere, 19, 345-370 (in Korean with English abstract).
  29. Lee, J. W., and S. Y. Hong, 2006: A numerical simulation study of orographic effects for a heavy rainfall event over Korea using the WRF model. Atmosphere, 16, 319-332 (in Korean with English abstract).
  30. Lopez, R. E., P. T. Gannon, Sr., D. O. Blanchard, and C. C. Balch, 1984: Synoptic and regional circulation parameters associated with the degree of convective shower activity in South Florida. Mon. Wea. Rev., 112, 686-703. https://doi.org/10.1175/1520-0493(1984)112<0686:SARCPA>2.0.CO;2
  31. Nam, K.-Y., Y.-H. Kim, K.-E. Kim, and J.-C. Nam, 2005: Study on the multi-cell storm structure using dual doppler radars observations. J. Korean Meteor. Soc., 41, 967-981 (in Korean with English abstract).
  32. Oh, I.-B., Y.-K. Kim, and M.-K. Hwang, 2004: Effects of late sea-breeze on ozone distributions in the coastal Urban area. J. Korean Soc. Atoms. Env., 20, 345-360 (in Korean with English abstract).
  33. Park, C.-G., and T.-Y. Lee, 2008: Structure of mesoscale heavy precipitation systems originated from the changma front. Atmosphere, 18, 317-338 (in Korean with English abstract).
  34. Park, C. H., H. W. Lee, and W. S. Jung, 2003: The effects of low-level and topography on heavy rainfall near Mt. Jirisan. J. Korean Meteor. Soc., 39, 441-458 (in Korean with English abstract).
  35. Park, S. Y., and T. Y. Lee, 2003: A case study on the dependence of simulated cumulus convection on horizontal grid size. J. Korean Meteor. Soc., 39, 379-396 (in Korean with English abstract).
  36. Song, I.-S., H.-Y. Chun, S.-M. Lee, and T.-Y. Lee, 2000: A numerical study on physical processes related to periodic cell regeneration in mulicell storm. J. Korean Meteor. Soc., 36, 51-64 (in Korean with English abstract).
  37. Wakimoto, R. M., 1982: The life cycle of thunderstorm gust fronts as viewed with doppler radar and rawinsonde data. Mon. Wea. Rev., 110, 1060-1082. https://doi.org/10.1175/1520-0493(1982)110<1060:TLCOTG>2.0.CO;2
  38. Wakimoto, R. M., and N. T. Atkins, 1994: Observations of the seabreeze front during CaPE. Part I: Single-doppler, satellite, and cloud photogrammetry analysis. Mon. Wea. Rev., 122, 1092-1114. https://doi.org/10.1175/1520-0493(1994)122<1092:OOTSBF>2.0.CO;2
  39. Wallace, J. M., and P. V. Hobbs, 2006: Atmospheric Science, 2nd ed. Elsevier Inc., 483 pp.
  40. Warren, R. A., D. J. Kirshbaum R. S. Plant, and H. W. Lean, 2014: A 'Boscastle-type' quasi-stationary convective system over the UK Southwest Peninsula. Quart. J. Roy. Meteor. Soc., 140, 240-257. https://doi.org/10.1002/qj.2124
  41. Weisman, M. L., and J. B. Klemp, 1982: The dependence of numerically simulated convective storms on vertical wind shear and buoyancy. Mon. Wea. Rev., 110, 504-520. https://doi.org/10.1175/1520-0493(1982)110<0504:TDONSC>2.0.CO;2
  42. Winston, J., R. Radhika, K. Narayanan, K. Sen, and P. K. Kunhikrishnan, 1992: On the structure of sea-breeze fronts observed near the coastline of Thumba, India. Bound.-Layer Meteor., 59, 111-124. https://doi.org/10.1007/BF00120689
  43. Zack, B., P. Markowski, and Y. Richadson, 2009: Descending reflectivity cores in supercell thunderstorms observed by mobile radars and in a high-resolution numercial simulation. Wea. Forecasting, 24, 155-186. https://doi.org/10.1175/2008WAF2222116.1