Fig. 2: The relative contributions of each favorable environmental factor to the differences in GPI anomalies in the SCS across three types of La Niña transitions.
From: More autumn tropical cyclone genesis in the South China Sea during El Niño to La Niña transition
Contributions of each term on the right-hand side of Eq. (1) to GPI anomalies in the SCS for cyclic La Niña, multi-year La Niña, and episodic La Niña in SON during the developing phase. The four terms include \({\alpha }_{1}\delta Term1\) (red bar, 1/°C; \(Term1={|{10}^{5}{\eta }_{850}|}^{3/2}\)), \({\alpha }_{2}\delta Term2\) (orange bar, 1/°C; \(Term2={|1+0.1Vshear|}^{-2}\)), \({\alpha }_{3}\delta Term3\) (sky-blue bar, 1/°C; \(Term3={|\frac{H}{50}|}^{3}\)), and \({\alpha }_{4}\delta Term4\) (blue bar, 1/°C; \(Term4={|\frac{{V}_{pot}}{70}|}^{3}\)). The coefficients \({\alpha }_{1}\), \({\alpha }_{2}\), \({\alpha }_{3}\) and \({\alpha }_{4}\) are constant and their details are provided in Eq. (5) in the Methods section. These four terms are normalized by the absolute value of SST anomalies averaged over Niño 3.4.
