Fig. 5: Historical changes in σconv and the area of OWP28 and DCFP simulated by 20 CMIP6 models. | npj Climate and Atmospheric Science

Fig. 5: Historical changes in σconv and the area of OWP28 and DCFP simulated by 20 CMIP6 models.

From: Differential expansion speeds of Indo-Pacific warm pool and deep convection favoring pool under greenhouse warming

Fig. 5

a–d respectively same as Figs. 1a, b, e and 4a, except based on the ensemble historical simulations of 20 CMIP6 models from 1979–2014. The linear trends of all series in c, marked on the figure legend, are statistically significant at the 99.9% confidence level. In d, the linear trend of the OWP28 area is statistically significant at the 99.9% confidence level but those of the other series are insignificant. The results show that the increase in σconv and the inconsistent expansion speed between OWP28 and DCFP are also captured by current climate models. Note the relatively smaller σconv of the same precipitation level compared to observation, which may be a result of systematic model bias of precipitation simulation.

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