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. 2015 Jun 3;10(6):e0128533. doi: 10.1371/journal.pone.0128533

Fig 6. Variation in reconstructed northwest Australian precipitation, the Southern Annular Mode, The Ningaloo Niño and the El Niño Southern Oscillation over the last two centuries.

Fig 6

(a) Reconstructed precipitation in semi-arid northwest Australia; the Southern Annular Mode (SAM) (b) as an observation-based index calculated by the British Antarctic Survey (BAS) and two instrumental reconstructions by (c) Visbeck [72] and (d) Fogt [70,71] and (e) a tree-ring based reconstruction of the SAM [65]; (f) the Ningaloo Niño index (NNI, see text for definition); and the El Niño Southern Oscillation (ENSO), as (g) the Southern Oscillation Index (SOI) and (h) the Niño 4 SST index. Darker lines in each plot are 20-year loess smoothing curves. “Wet” and “Dry” labels indicate the typical effect of the SAM, NN and ENSO on summer-autumn precipitation in inland northwest Australia. The shaded box highlights the timing of the recent wet period in inland semi-arid northwest Australia.