Tochimoto, E., and T. Kawano, 2017: Numerical investigation of development processes of Baiu frontal depressions. Part I : Case studies. J. Meteor. Soc. Japan, 95, 91-109.
http://doi.org/10.2151/jmsj.2017-005 Graphical Abstract with highlights
- This work investigates development processes of Baiu frontal depressions (BFDs) using WRF model. Two typical cases were selected from BFDs that appeared in June and July, 2000-2007: a BFD that developed in the western part of the Baiu frontal zone (W-BFD) and a BFD that had formed in the eastern part of the Baiu frontal zone (E-BFD).
- The effect of latent heating is dominant during the W-BFD development, while baroclinicity as well as latent heating is important to the E-BFD development.
- The W-BFD has a development mechanism driven by latent heating. In the early developmental stage, PV near the W-BFD center is enhanced. This feature is consistent with the nonlinear conditional instability of the second kind mechanism. In the later developmental stage, PV is produced in front of the W-BFD center, in which low-level baroclinicity is large. This process is consistent with a diabatic Rossby vortex.