Fig. 5
From: Climate-driven reproductive decline in Southern right whales
Principal Component Analysis (PCA) biplot showing climate variation in relation to southern right whale calving interval (CI, in years). The biplot displays the first two principal components (PC1 and PC2), which together explain 57.5% of the variance in the standardised climate variables. Arrows indicate the loadings of each variable: Antarctic Oscillation (AAO), Oceanic Niño Index (ONI), Antarctic sea ice concentration anomaly (SIC), and cumulative summer Chl anomaly (Chl) onto the PC space. Points represent individual years, coloured by CI.
