Figure 1. Multidecadal variability in
- Ocean thermal stratification
- The Pacific Decadal Oscillation index (annual averages, Mantua et al. 1997)
- Biomass anomalies of the krill Nyctiphanes simplex
- Biomass anomalies of the uncommon doliolid D. denticulatum
- Biomass of an assemblage of salps that predominate in the cool phase
All records begin in 1950 (from Ohman and Venrick 2003). Dashed lines indicate hypothesized nodes