Zhao, H., X. Jiang, and L. Wu, 2015: Modulation of Northwest Pacific tropical cyclone genesis by the intraseasonal variability. J. Meteor. Soc. Japan, 93, 81-97.
- A majority of TC geneses over the WNP is found to occur during the period when both of these two modes are active (Fig.1), suggesting a joint influence of these two ISV modes on TC genesis over the WNP.
- Modulation of TC genesis over the WNP by the two leading ISV modes can be well depicted by the genesis potential index (GPI) (Fig.2).
- Further investigations indicate that while in general, the low-level absolute vorticity and mid-level relative humidity are the two most important factors affecting WNP TC genesis, relative roles of the four GPI factors tend also to be dependent on the ISV phases (Fig.2).