Diatom Principal Component analyses

Diatom principal component analysis (PCA) axis 1 and axis 2 scores, diatom P/B ratio, and water-depth reconstruction. Vertical dashed lines indicate mean values of the last 1000 years. Asterisks and triangles on the right indicate samples that have poor and no modern analogues, respectively. Bold curves are loess smoothed data (span = 0.1). Reconstructed water depths are shown with error envelope.