Editorial Type:
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Article Type:
Research Article

The Remote Effect of Typhoon Megi (2010) on the Heavy Rainfall over Northeastern Taiwan

Ting-Chen Chen Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan

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Chun-Chieh Wu Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan

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Print Publication:
01 Sep 2016
DOI:
https://doi.org/10.1175/MWR-D-15-0269.1
Page(s):
3109–3131
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Abstract

The goal of this work is to improve understanding of the mechanisms leading to a heavy rainfall event under the combined influences of the outer circulation of Typhoon Megi (2010), the Asian monsoon, and the topography of Taiwan. Megi is a case featuring high forecast uncertainty associated with its sudden recurvature, along with remote heavy rainfall over northeastern Taiwan (especially at Yilan) and its adjacent seas during 19–23 October 2010. An ensemble simulation is conducted, and characteristic ensemble members are separated into subgroups based on either track accuracy or rainfall forecast skill. Comparisons between different subgroups are made to investigate favorable processes for precipitation and how the differences between these subgroups affect the rainfall simulation.

Several mechanisms leading to this remote rainfall event are shown. The northward transport of water vapor by Megi’s outer circulation provides a moisture-laden environment over the coastal area of eastern Taiwan. Meanwhile, the outer circulation of Megi (with high ) encounters the northeasterly monsoon (with low ), and strong vertical motion is triggered through isentropic lifting in association with low-level frontogenesis over the ocean northeast of Yilan. Most importantly, the northeasterly flow advects the moisture inland to the steep mountains in south-southwestern Yilan, where strong orographic lifting further induces torrential rainfall. In addition, the analyses further attribute the uncertainty in simulating Megi’s remote rainfall to several factors, including variations of storm track, strength and extension of the northeasterly monsoon, and, above all, the impinging angle of the upstream flow on the topography.

Corresponding author address: Chun-Chieh Wu, Department of Atmospheric Sciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan. E-mail: cwu@typhoon.as.ntu.edu.tw

Abstract

The goal of this work is to improve understanding of the mechanisms leading to a heavy rainfall event under the combined influences of the outer circulation of Typhoon Megi (2010), the Asian monsoon, and the topography of Taiwan. Megi is a case featuring high forecast uncertainty associated with its sudden recurvature, along with remote heavy rainfall over northeastern Taiwan (especially at Yilan) and its adjacent seas during 19–23 October 2010. An ensemble simulation is conducted, and characteristic ensemble members are separated into subgroups based on either track accuracy or rainfall forecast skill. Comparisons between different subgroups are made to investigate favorable processes for precipitation and how the differences between these subgroups affect the rainfall simulation.

Several mechanisms leading to this remote rainfall event are shown. The northward transport of water vapor by Megi’s outer circulation provides a moisture-laden environment over the coastal area of eastern Taiwan. Meanwhile, the outer circulation of Megi (with high ) encounters the northeasterly monsoon (with low ), and strong vertical motion is triggered through isentropic lifting in association with low-level frontogenesis over the ocean northeast of Yilan. Most importantly, the northeasterly flow advects the moisture inland to the steep mountains in south-southwestern Yilan, where strong orographic lifting further induces torrential rainfall. In addition, the analyses further attribute the uncertainty in simulating Megi’s remote rainfall to several factors, including variations of storm track, strength and extension of the northeasterly monsoon, and, above all, the impinging angle of the upstream flow on the topography.

Corresponding author address: Chun-Chieh Wu, Department of Atmospheric Sciences, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, Taiwan. E-mail: cwu@typhoon.as.ntu.edu.tw
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  • Atallah, E. H., and L. F. Bosart, 2003: The extratropical transition and precipitation distribution of Hurricane Floyd (1999). Mon. Wea. Rev., 131, 1063–1081, doi:10.1175/1520-0493(2003)131<1063:TETAPD>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Black, T. L., 1994: The new NMC mesoscale Eta Model: Description and forecast examples. Wea. Forecasting, 9, 265–278, doi:10.1175/1520-0434(1994)009<0265:TNNMEM>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Carr, L. E., and R. L. Elsberry, 1995: Monsoonal interactions leading to sudden tropical cyclone track changes. Mon. Wea. Rev., 123, 265–290, doi:10.1175/1520-0493(1995)123<0265:MILTST>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Chang, C.-P., T.-C. Yeh, and J. M. Chen, 1993: Effects of terrain on the surface structure of typhoons over Taiwan. Mon. Wea. Rev., 121, 734–752, doi:10.1175/1520-0493(1993)121<0734:EOTOTS>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Chen, S.-J., W. Wang, K.-H. Lau, Q.-H. Zhang, and Y.-S. Chung, 2000: Mesoscale convective systems along the Meiyu front in a numerical model. Meteor. Atmos. Phys., 75, 149–160, doi:10.1007/s007030070002.

    • Search Google Scholar
    • Export Citation

  • Chen, T.-J. G., and C.-P. Chang, 1980: The structure and vorticity budget of an early summer monsoon trough (Mei-Yu) over southeastern China and Japan. Mon. Wea. Rev., 108, 942–953, doi:10.1175/1520-0493(1980)108<0942:TSAVBO>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Chien, F.-C., and H.-C. Kuo, 2011: On the extreme rainfall of Typhoon Morakot (2009). J. Geophys. Res., 116, D05104, doi:10.1029/2010JD015092.

    • Search Google Scholar
    • Export Citation

  • Chien, F.-C., Y.-H. Kuo, and M.-J. Yang, 2002: Precipitation forecast of MM5 in the Taiwan area during the 1998 Mei-yu season. Wea. Forecasting, 17, 739–754, doi:10.1175/1520-0434(2002)017<0739:PFOMIT>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Chien, F.-C., Y.-C. Liu, and C.-S. Lee, 2008: Heavy rainfall and southwesterly flow after the leaving of Typhoon Mindulle (2004) from Taiwan. J. Meteor. Soc. Japan, 86, 17–41, doi:10.2151/jmsj.86.17.

    • Search Google Scholar
    • Export Citation

  • Colle, B. A., 2003: Numerical simulations of the extratropical transition of Floyd (1999): Structural evolution and responsible mechanisms for the heavy rainfall over the northeast United States. Mon. Wea. Rev., 131, 2905–2926, doi:10.1175/1520-0493(2003)131<2905:NSOTET>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Cote, M. R., 2007: Predecessor rain events in advance of tropical cyclones. M.S. thesis, Dept. of Atmospheric and Environmental Sciences, University at Albany, State University of New York, 200 pp. [Available online at http://cstar.cestm.albany.edu/CAP_Projects/Project10/index.htm.]

  • D’Asaro, E. A., and Coauthors, 2014: Impact of typhoons on the ocean in the Pacific. Bull. Amer. Meteor. Soc., 95, 1405–1418, doi:10.1175/BAMS-D-12-00104.1.

    • Search Google Scholar
    • Export Citation

  • Dudhia, J., 1989: Numerical study of convection observed during the Winter Monsoon Experiment using a mesoscale two-dimensional model. J. Atmos. Sci., 46, 3077–3107, doi:10.1175/1520-0469(1989)046<3077:NSOCOD>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Evensen, G., 1994: Sequential data assimilation with a nonlinear quasi-geostrophic model using Monte Carlo methods to forecast error statistics. J. Geophys. Res., 99, 10 143–10 162, doi:10.1029/94JC00572.

    • Search Google Scholar
    • Export Citation

  • Evensen, G., 2003: The ensemble Kalman filter: Theoretical formulation and practical implementation. Ocean Dyn., 53, 343–367, doi:10.1007/s10236-003-0036-9.

    • Search Google Scholar
    • Export Citation

  • Fang, X., and Y.-H. Kuo, 2013: Improving ensemble-based quantitative precipitation forecasts for topography-enhanced typhoon heavy rainfall over Taiwan with a modified probability-matching technique. Mon. Wea. Rev., 141, 3908–3932, doi:10.1175/MWR-D-13-00012.1.

    • Search Google Scholar
    • Export Citation

  • Fang, X., Y.-H. Kuo, and A. Wang, 2011: The impacts of Taiwan topography on the predictability of Typhoon Morakot’s record-breaking rainfall: A high-resolution ensemble simulation. Wea. Forecasting, 26, 613–633, doi:10.1175/WAF-D-10-05020.1.

    • Search Google Scholar
    • Export Citation

  • Galarneau, T. J., L. F. Bosart, and R. S. Schumacher, 2010: Predecessor rain events ahead of tropical cyclones. Mon. Wea. Rev., 138, 3272–3297, doi:10.1175/2010MWR3243.1.

    • Search Google Scholar
    • Export Citation

  • Grell, G. A., and S. R. Freitas, 2014: A scale and aerosol aware stochastic convective parameterization for weather and air quality modeling. Atmos. Chem. Phys., 14, 5233–5250, doi:10.5194/acp-14-5233-2014.

    • Search Google Scholar
    • Export Citation

  • Hong, S.-Y., and J.-O. J. Lim, 2006: The WRF Single-Moment 6-Class Microphysics Scheme (WSM6). J. Korean Meteor. Soc., 42, 129–151.

  • Hong, S.-Y., Y. Noh, and J. Dudhia, 2006: A new vertical diffusion package with an explicit treatment of entrainment processes. Mon. Wea. Rev., 134, 2318–2341, doi:10.1175/MWR3199.1.

    • Search Google Scholar
    • Export Citation

  • Huang, Y.-C., and Y.-L. Lin, 2014: A study on the structure and precipitation of Morakot (2009) induced by the Central Mountain Range of Taiwan. Meteor. Atmos. Phys., 123, 115–141, doi:10.1007/s00703-013-0290-4.

    • Search Google Scholar
    • Export Citation

  • Huang, Y.-H., C.-C. Wu, and Y. Wang, 2011: The influence of island topography on typhoon track deflection. Mon. Wea. Rev., 139, 1708–1727, doi:10.1175/2011MWR3560.1.

    • Search Google Scholar
    • Export Citation

  • Jiang, Q., 2003: Moist dynamics and orographic precipitation. Tellus, 55A, 301–316, doi:10.1034/j.1600-0870.2003.00025.x.

  • Jones, S. C., and Coauthors, 2003: The extratropical transition of tropical cyclones: Forecast challenges, current understanding, and future directions. Wea. Forecasting, 18, 1052–1092, doi:10.1175/1520-0434(2003)018<1052:TETOTC>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Keyser, D., M. J. Pecnick, and M. A. Shapiro, 1986: Diagnosis of the role of vertical deformation in a two-dimensional primitive equation model of upper-level frontogenesis. J. Atmos. Sci., 43, 839–850, doi:10.1175/1520-0469(1986)043<0839:DOTROV>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Kieu, C. Q., N. M. Truong, H. T. Mai, and T. Ngo-Duc, 2012: Sensitivity of the track and intensity forecasts of Typhoon Megi (2010) to satellite-derived atmospheric motion vectors with the ensemble Kalman filter. J. Atmos. Oceanic Technol., 29, 1794–1810, doi:10.1175/JTECH-D-12-00020.1.

    • Search Google Scholar
    • Export Citation

  • Lee, C.-S., Y.-C. Liu, and F.-C. Chien, 2008: The secondary low and heavy rainfall associated with Typhoon Mindulle (2004). Mon. Wea. Rev., 136, 1260–1283, doi:10.1175/2007MWR2069.1.

    • Search Google Scholar
    • Export Citation

  • Lin, Y.-L., 1993: Orographic effects on airflow and mesoscale weather systems over Taiwan. Terr. Atmos. Oceanic Sci., 4, 381–420.

  • Lin, Y.-L., S. Chiao, T.-A. Wang, M. L. Kaplan, and R. P. Weglarz, 2001: Some common ingredients for heavy orographic rainfall. Wea. Forecasting, 16, 633–660, doi:10.1175/1520-0434(2001)016<0633:SCIFHO>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Lonfat, M., F. D. Marks, and S. S. Chen, 2004: Precipitation distribution in tropical cyclones using the Tropical Rainfall Measuring Mission (TRMM) microwave imager: A global perspective. Mon. Wea. Rev., 132, 1645–1660, doi:10.1175/1520-0493(2004)132<1645:PDITCU>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Marchok, T., R. Rogers, and R. Tuleya, 2007: Validation schemes for tropical cyclone quantitative precipitation forecasts: Evaluation of operational models for U.S. landfalling cases. Wea. Forecasting, 22, 726–746, doi:10.1175/WAF1024.1.

    • Search Google Scholar
    • Export Citation

  • Meng, Z., and F. Zhang, 2008a: Test of an ensemble Kalman filter for mesoscale and regional-scale data assimilation. Part III: Comparison with 3DVAR in a real-data case study. Mon. Wea. Rev., 136, 522–540, doi:10.1175/2007MWR2106.1.

    • Search Google Scholar
    • Export Citation

  • Meng, Z., and F. Zhang, 2008b: Test of an ensemble Kalman filter for mesoscale and regional-scale data assimilation. Part IV: Comparison with 3DVAR in a month-long experiment. Mon. Wea. Rev., 136, 3671–3682, doi:10.1175/2008MWR2270.1.

    • Search Google Scholar
    • Export Citation

  • Mlawer, E. J., S. J. Taubman, P. D. Brown, M. J. Iacono, and S. A. Clough, 1997: Radiative transfer for inhomogeneous atmospheres: RRTM, a validated correlated-k model for the longwave. J. Geophys. Res., 102, 16 663–16 682, doi:10.1029/97JD00237.

    • Search Google Scholar
    • Export Citation

  • Ninomiya, K., 1984: Characteristics of Baiu front as a predominant subtropical front in the summer Northern Hemisphere. J. Meteor. Soc. Japan, 62, 880–893.

    • Search Google Scholar
    • Export Citation

  • Peng, S., and Coauthors, 2014: On the mechanisms of the recurvature of super typhoon Megi. Sci. Rep., 4, 4451, doi:10.1038/srep04451.

  • Qian, C., F. Zhang, B. W. Green, J. Zhang, and X. Zhou, 2013: Probabilistic evaluation of the dynamics and prediction of Supertyphoon Megi (2010). Wea. Forecasting, 28, 1562–1577, doi:10.1175/WAF-D-12-00121.1.

    • Search Google Scholar
    • Export Citation

  • Schaefer, J. T., 1990: The critical success index as an indicator of warning skill. Wea. Forecasting, 5, 570–575, doi:10.1175/1520-0434(1990)005<0570:TCSIAA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Schumacher, R. S., and T. J. Galarneau Jr., 2012: Moisture transport into midlatitudes ahead of recurving tropical cyclones and its relevance in two predecessor rain events. Mon. Wea. Rev., 140, 1810–1827, doi:10.1175/MWR-D-11-00307.1.

    • Search Google Scholar
    • Export Citation

  • Shi, W., J. Fei, X. Huang, X. Cheng, J. Ding, and Y. He, 2014: A numerical study on the combined effect of midlatitude and low-latitude systems on the abrupt track deflection of Typhoon Megi (2010). Mon. Wea. Rev., 142, 2483–2501, doi:10.1175/MWR-D-13-00283.1.

    • Search Google Scholar
    • Export Citation

  • Skamarock, W. C., and Coauthors, 2008: A description of the Advanced Research WRF version 3. NCAR Tech. Note NCAR/TN-475+STR, 113 pp., doi:10.5065/D68S4MVH.

  • Stoelinga, M. T., 2009: A users’ guide to RIP version 4.5: A program for visualizing mesoscale model output. University of Washington, accessed 30 July 2015. [Available online at http://www2.mmm.ucar.edu/wrf/users/docs/ripug.htm.]

  • Wang, C.-C., H.-C. Kuo, Y.-H. Chen, H.-L. Huang, C.-H. Chung, and K. Tsuboki, 2012: Effects of asymmetric latent heating on typhoon movement crossing Taiwan: The case of Morakot (2009) with extreme rainfall. J. Atmos. Sci., 69, 3172–3196, doi:10.1175/JAS-D-11-0346.1.

    • Search Google Scholar
    • Export Citation

  • Wang, Y., Y. Wang, and H. Fudeyasu, 2009: The role of Typhoon Songda (2004) in producing distantly located heavy rainfall in Japan. Mon. Wea. Rev., 137, 3699–3716, doi:10.1175/2009MWR2933.1.

    • Search Google Scholar
    • Export Citation

  • Wu, C.-C., and Y.-H. Kuo, 1999: Typhoons affecting Taiwan: Current understanding and future challenges. Bull. Amer. Meteor. Soc., 80, 67–80, doi:10.1175/1520-0477(1999)080<0067:TATCUA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Wu, C.-C., T.-H. Yen, Y.-H. Kuo, and W. Wang, 2002: Rainfall simulation associated with Typhoon Herb (1996) near Taiwan. Part I: The topographic effect. Wea. Forecasting, 17, 1001–1015, doi:10.1175/1520-0434(2003)017<1001:RSAWTH>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Wu, C.-C., and Coauthors, 2005: Dropwindsonde Observations for Typhoon Surveillance near the Taiwan Region (DOTSTAR): An overview. Bull. Amer. Meteor. Soc., 86, 787–790, doi:10.1175/BAMS-86-6-787.

    • Search Google Scholar
    • Export Citation

  • Wu, C.-C., K. K. W. Cheung, and Y.-Y. Lo, 2009: Numerical study of the rainfall event due to the interaction of Typhoon Babs (1998) and the northeasterly monsoon. Mon. Wea. Rev., 137, 2049–2064, doi:10.1175/2009MWR2757.1.

    • Search Google Scholar
    • Export Citation

  • Wu, C.-C., G.-Y. Lien, J.-H. Chen, and F. Zhang, 2010: Assimilation of tropical cyclone track and structure based on the ensemble Kalman filter (EnKF). J. Atmos. Sci., 67, 3806–3822, doi:10.1175/2010JAS3444.1.

    • Search Google Scholar
    • Export Citation

  • Wu, C.-C., S.-G. Chen, S.-C. Lin, T.-H. Yen, and T.-C. Chen, 2013: Uncertainty and predictability of tropical cyclone rainfall based on ensemble simulations of Typhoon Sinlaku (2008). Mon. Wea. Rev., 141, 3517–3538, doi:10.1175/MWR-D-12-00282.1.

    • Search Google Scholar
    • Export Citation

  • Wu, L., Z. Ni, J. Duan, and H. Zong, 2013: Sudden tropical cyclone track changes over the western North Pacific: A composite study. Mon. Wea. Rev., 141, 2597–2610, doi:10.1175/MWR-D-12-00224.1.

    • Search Google Scholar
    • Export Citation

  • Yamada, H., B. Geng, H. Uyeda, and K. Tsuboki, 2007: Thermodynamic impact of the heated landmass on the nocturnal evolution of a cloud cluster over a Meiyu–Baiu front. J. Meteor. Soc. Japan, 85, 663–685, doi:10.2151/jmsj.85.663.

    • Search Google Scholar
    • Export Citation

  • Yang, M.-J., D.-L. Zhang, and H.-L. Huang, 2008: A modeling study of Typhoon Nari (2001) at landfall. Part I: Topographic effects. J. Atmos. Sci., 65, 3095–3115, doi:10.1175/2008JAS2453.1.

    • Search Google Scholar
    • Export Citation

  • Yang, M.-J., S. A. Braun, and D.-S. Chen, 2011: Water budget of Typhoon Nari (2001). Mon. Wea. Rev., 139, 3809–3828, doi:10.1175/MWR-D-10-05090.1.

    • Search Google Scholar
    • Export Citation

  • Yen, T.-H., C.-C. Wu, and G.-Y. Lien, 2011: Rainfall simulations of Typhoon Morakot with controlled translation speed based on EnKF data assimilation. Terr. Atmos. Oceanic Sci., 22, 647–660, doi:10.3319/TAO.2011.07.05.01(TM).

    • Search Google Scholar
    • Export Citation

  • Yu, C.-K., and L.-W. Cheng, 2008: Radar observations of intense orographic precipitation associated with Typhoon Xangsane (2000). Mon. Wea. Rev., 136, 497–521, doi:10.1175/2007MWR2129.1.

    • Search Google Scholar
    • Export Citation

  • Yu, C.-K., and L.-W. Cheng, 2013: Distribution and mechanisms of orographic precipitation associated with Typhoon Morakot (2009). J. Atmos. Sci., 70, 2894–2915, doi:10.1175/JAS-D-12-0340.1.

    • Search Google Scholar
    • Export Citation

  • Yu, C.-K., and L.-W. Cheng, 2014: Dual-Doppler-derived profiles of the southwesterly flow associated with southwest and ordinary typhoons off the southwestern coast of Taiwan. J. Atmos. Sci., 71, 3202–3222, doi:10.1175/JAS-D-13-0379.1.

    • Search Google Scholar
    • Export Citation

  • Zhang, F., Z. Meng, and A. Aksoy, 2006: Test of an ensemble Kalman filter for mesoscale and regional-scale data assimilation. Part I: Perfect model experiments. Mon. Wea. Rev., 134, 722–736, doi:10.1175/MWR3101.1.

    • Search Google Scholar
    • Export Citation

  • Zhang, F., Y. Weng, Y.-H. Kuo, J. S. Whitaker, and B. Xie, 2010: Predicting Typhoon Morakot’s catastrophic rainfall with a convection-permitting mesoscale ensemble system. Wea. Forecasting, 25, 1816–1825, doi:10.1175/2010WAF2222414.1.

    • Search Google Scholar
    • Export Citation

  • Zhou, Y. S., S. T. Gao, and S. S. P. Shen, 2004: A diagnostic study of formation and structures of Meiyu front system over East Asia. J. Meteor. Soc. Japan, 82, 1565–1576, doi:10.2151/jmsj.82.1565.

    • Search Google Scholar
    • Export Citation
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