Extended Data Fig. 8: Cross-comparison between the annual averages of CS-δ15N and Niño 3.4 index.
From: Increased tropical South Pacific western boundary current transport over the past century
The CS-δ15N is generally negatively correlated with Niño 3.4 SST anomalies66, with lower values during El Niño conditions. However, the relationship breaks down after 1982, largely because that CS-δ15N no longer increases during La Niña conditions.
