Professional Paper 1386–A
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Figure 63. Variability of AAR (AARi), and the change with time of the accumulation-area ratio (AAR) in terms of standardized cumulative departure. AARi averages data for all time series longer than 5 years; bars are standard errors. The change with time of (AAR) shifts to a decrease at the end of 1970s; data after 2001 are incomplete. AARi is the mean of the annual values for AAR for all time series; it averages (AAR) during the period from 1961 to 2001.