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. 2019 Oct 28;377(2160):20190006. doi: 10.1098/rsta.2019.0006

Figure 4.

Figure 4.

Using the Nino3.4 and the IOD indices, the coupling equation, equation (4.1), is applied to the ENSO and the IOD to quantify their seasonal interaction. Seasonal stabilities, a1,2(t), coupling intensities, b12,21(t), and the intensity of the noises, N1,2(t), are calculated following the procedures in §4. (a) The seasonal stability for the ENSO, a1(t) (thick), the influence of the IOD on the ENSO, b12(t) (dash-dotted), a1(t) − b12(t) (dashed) and aNino3.4 (dotted). (b) The same as (a) but for a2(t), the influence of the ENSO on the IOD, b21(t), a2(t) − b21(t) and aIOD.