Figure 9. Same as Fig. 8, but for TNn.
Fig. 10 exhibits the spatial distributions of the multi-model median SNR for TXx and TNn under SSP5-8.5 and RCP8.5 in the year 2050, for which the signal is in Figs. S21. Under both SSP5-8.5 and RCP8.5, despite exhibiting different spatial patterns, the magnitudes of SNR for TXx and TNn are already above 1 over most Australian regions in 2050. For TXx (Fig. 10a, c), there are larger SNR values (>2) over northwest Australia and lower SNR values (>1) over southwest regions. In contrast, the SNR for TNn (Fig. 10b, d) is more than 2 over western and central Australia and indicates lower values (>1) over tropical and southeast regions. As described in Frame et al. (2017), around mid-century, the regions exhibiting SNR > 1 suggest that there would be “unusual” climate compared to the recent climate over 1950-2005; and for TXx over northwest Australia and TNn over western and central regions, the new climate for the extremes would be “unfamiliar” (SNR > 2). Compared to RCP8.5, SSP5-8.5 in CMIP6 generally displays stronger SNR and the corresponding signal for the two indices, which is valid for other SSPs and RCPs (Figs. S22 and S23).