Figure 8. Temporal reconstructions of Palmer Drought Severity Index (PDSI) at a suite of significant frequencies (which are the secular trend (0 cycles/year); El Nino/Southern Oscillation (ENSO) band (0.1956, 0.2122, 0.2280, 0.2654, 0.2783, 0.2942 cycles/year), and the Atlantic Multidecadal Oscillation (AMO) (0.0149 cycles/year) at locations in the (a) northwestern United States (US) at 43.75N and 123.75W, (b) southwestern US at 36.25N and 113.75W and (c) east coast of the US at 38.75N and 76.25W. The reconstructions are performed separately at each frequency and are summed to result in a single combined temporal reconstruction. The actual PDSI time series is also shown.
