The large annual variability is due to north - south asymmetry. (watertechbyrie.com)
«The incorporation of geothermal data into a multi-proxy reconstruction therefore offers an independent estimate of long - term temperature trends that can be integrated with estimates of annual variability deduced from tree ring widths. (realclimate.org)
Statistics describing annual variability in runoff gains are shown in Table 2 and illustrated graphically for 4FRI scenario in Figure 8. (journals.plos.org)