Piecewise potential vorticity diagnosis of the development of a polar low over the Sea of Japan

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Wu, Longtao ; Martin, Jonathan E. ; Petty, Grant W. (2011)

The piecewise potential vorticity (PV) inversion method developed by Davis and Emanuel (1991) is used to diagnose the development processes of a polar low over the Sea of Japan in December 2003. The synoptic scale-balanced flows associated with the polar low are successfully captured using the inversion method. It is shown that, antecedent to the development of the polar low, a positive lower-tropospheric temperature anomaly was induced by the approach of a positive tropopause-level PV anomaly over the northern Sea of Japan. The analysis suggests that the polar low was initiated as a result of the combined effect of the positive PV anomaly near the tropopause and the near-surface positive temperature anomaly. The rapid height falls in the lower troposphere were primarily contributed by the upper tropospheric PV anomaly. Further intensification of the polar low was afforded by latent heat release associated with cloud and precipitation processes. After the polar low moved over northern Honshu, quick dissipation was primarily rendered by the thinning and elongating of the upper level PV anomaly that led to a rapid reduction of the lower troposphere height perturbations associated with it.
  • References (37)
    37 references, page 1 of 4

    Bracegirdle, T. J. and Gray, S. L. 2009. The dynamics of a polar low assessed using potential vorticity inversion. Quart. J. R. Meteorol. Soc. 135, 880-893.

    Bresch, J. F., Reed, R. J. and Albright, M. D. 1997. A Polar-Low development over the Bering Sea: analysis, numerical simulation, and sensitivity experiments, Mon. Wea. Rev. 125, 3109-3130.

    Bretherton, F. P. 1966. Baroclinic instability and the shortwave cutoff in terms of potential vorticity. Quart. J. R. Meteorol. Soc. 92, 335- 345.

    Cammas, J.-P., Keyser, D., Lackmann, G. and Molinari, J. 1994. Diabatic redistribution of potential vorticity accompanying the development of an outflow jet within a strong extratropical cyclones. In: Proc. Int. Symp. on Life Cycles of Extratropical Cyclones, Volume II, Aase Grafiske A/S, Bergen, Norway, 403-409.

    Charney, J. 1955. The use of the primitive and balance equations. Tellus 7, 22-26.

    Davis, C. A. and Emanuel, K. A. 1991. Potential vorticity diagnostics of cyclogenesis. Mon. Wea. Rev. 119, 1929-1953.

    Davis, C. A., Stoelinga, M. T. and Kuo, Y.-H. 1993. The integrated effect of condensation in numerical simulations of extratropical cyclogenesis. Mon. Wea. Rev. 121, 2309-2330.

    Deng, A., Seaman, N. L., Hunter, G. K. and Stauffer, D. R. 2004. Evaluation of interregional transport using the MM5-SCIPUFF system. J. Appl. Meteorol. 43, 1864-1886, doi: 10.1175/JAM2178.1 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.

    Dudhia, J., Hong, S.-Y. and Lim, K.-S. 2008. A new method for representing mixed-phase particle fall speeds in bulk microphysics parameterizations. J. Meteorol. Soc. Japan, 86A, 33-44.

    Ertel, H. 1942. Ein Neuer hydrodynamischer Wirbelsatz. Meteorol. Z., 59, 271-281.

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