Fig. 3
From: Low ocean-floor rises regulate subpolar sea surface temperature by forming baroclinic jets
Propagation of low-frequency signals of the subtropical origin and the subpolar origin. Lag correlation map between low-pass filtered (>7 years) SSH anomaly from satellite45 and normalized SSH time series in the a southeastern box (SSH-S), and b the northwestern box (SSH-N). The southeastern box is indicated by a purple box in a, while the northwestern box is in b. Lag = 0.0 year denotes the simultaneous correlation. Lag = −3.0 year in a denotes that the SSH anomaly leads the SSH-S time series by 3 years. White contours denote significance level greater than 95%. Black contours represent the characteristic curves Qc given by Eq. (2) with a 4.5 and 8 × 10−6 s−1, and b 8 and 12 × 10−6 s−1
