Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006).

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  • Additional Information
    • Subject Terms:
    • Author-Supplied Keywords:
      Data assimilation
      Ensembles
      Hurricanes
      Numerical analysis/modeling
      Singular vectors
    • NAICS/Industry Codes:
      541990 All Other Professional, Scientific, and Technical Services
    • Abstract:
      The sensitivity of singular vectors (SVs) associated with Hurricane Helene (2006) to resolution and diabatic processes is investigated. Furthermore, the dynamics of their growth are analyzed. The SVs are calculated using the tangent linear and adjoint model of the integrated forecasting system (IFS) of the European Centre for Medium-Range Weather Forecasts with a spatial resolution up to TL255 (~80 km) and 48-h optimization time. The TL255 moist (diabatic) SVs possess a three-dimensional spiral structure with significant horizontal and vertical upshear tilt within the tropical cyclone (TC). Also, their amplitude is larger than that of dry and lower-resolution SVs closer to the center of Helene. Both higher resolution and diabatic processes result in stronger growth being associated with the TC compared to other flow features. The growth of the SVs in the vicinity of Helene is associated with baroclinic and barotropic mechanisms. The combined effect of higher resolution and diabatic processes leads to significant differences of the SV structure and growth dynamics within the core and in the vicinity of the TC. If used to initialize ensemble forecasts with the IFS, the higher-resolution moist SVs cause larger spread of the wind speed, track, and intensity of Helene than their lower-resolution or dry counterparts. They affect the outflow of the TC more strongly, resulting in a larger downstream impact during recurvature. Increasing the resolution or including diabatic effects degrades the linearity of the SVs. While the impact of diabatic effects on the linearity is small at low resolution, it becomes large at high resolution. [ABSTRACT FROM AUTHOR]
    • Abstract:
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    • ISSN:
      0022-4928
    • Accession Number:
      10.1175/JAS-D-11-048.1
    • Accession Number:
      71359922
  • Citations
    • ABNT:
      LANG, S. T. K. et al. Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006). Journal of the Atmospheric Sciences, [s. l.], v. 69, n. 2, p. 675–694, 2012. DOI 10.1175/JAS-D-11-048.1. Disponível em: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=a9h&AN=71359922&custid=s6224580. Acesso em: 2 dez. 2020.
    • AMA:
      Lang STK, Jones SC, Leutbecher M, Peng MS, Reynolds CA. Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006). Journal of the Atmospheric Sciences. 2012;69(2):675-694. doi:10.1175/JAS-D-11-048.1
    • APA:
      Lang, S. T. K., Jones, S. C., Leutbecher, M., Peng, M. S., & Reynolds, C. A. (2012). Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006). Journal of the Atmospheric Sciences, 69(2), 675–694. https://doi.org/10.1175/JAS-D-11-048.1
    • Chicago/Turabian: Author-Date:
      Lang, Simon T. K., Sarah C. Jones, Martin Leutbecher, Melinda S. Peng, and Carolyn A. Reynolds. 2012. “Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006).” Journal of the Atmospheric Sciences 69 (2): 675–94. doi:10.1175/JAS-D-11-048.1.
    • Harvard:
      Lang, S. T. K. et al. (2012) ‘Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006)’, Journal of the Atmospheric Sciences, 69(2), pp. 675–694. doi: 10.1175/JAS-D-11-048.1.
    • Harvard: Australian:
      Lang, STK, Jones, SC, Leutbecher, M, Peng, MS & Reynolds, CA 2012, ‘Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006)’, Journal of the Atmospheric Sciences, vol. 69, no. 2, pp. 675–694, viewed 2 December 2020, .
    • MLA:
      Lang, Simon T. K., et al. “Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006).” Journal of the Atmospheric Sciences, vol. 69, no. 2, Feb. 2012, pp. 675–694. EBSCOhost, doi:10.1175/JAS-D-11-048.1.
    • Chicago/Turabian: Humanities:
      Lang, Simon T. K., Sarah C. Jones, Martin Leutbecher, Melinda S. Peng, and Carolyn A. Reynolds. “Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006).” Journal of the Atmospheric Sciences 69, no. 2 (February 2012): 675–94. doi:10.1175/JAS-D-11-048.1.
    • Vancouver/ICMJE:
      Lang STK, Jones SC, Leutbecher M, Peng MS, Reynolds CA. Sensitivity, Structure, and Dynamics of Singular Vectors Associated with Hurricane Helene (2006). Journal of the Atmospheric Sciences [Internet]. 2012 Feb [cited 2020 Dec 2];69(2):675–94. Available from: http://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=a9h&AN=71359922&custid=s6224580