Fig. 4: North Pacific temperature and current velocity anomalies.
From: North Atlantic temperature control on deoxygenation in the northern tropical Pacific
Regressions of observed low-pass filtered annual-mean sea surface temperatures (SSTs, °C) on the A positive AMO and B positive PDO indices shown in Fig. 1 during 1950–2012. All data were linearly detrended prior to the analysis. SST data are from the Hadley Centre Sea Ice and Sea Surface Temperature (HadISST) dataset version 1 at 0.5° × 0.5° resolution. The cross-hatching marks regions where the correlation exceeds the 95% confidence level, estimated by using a Monte Carlo approach with 1000 random samples of the time series. Blue–red colours denote velocity anomalies of observed low-pass filtered annual-mean ocean currents (m s−1) at 96 m below the surface regressed on the C positive AMO and D positive PDO indices shown in Fig. 1 during 1950–2008. The contours denote the mean climatological current velocity at the same depth. All data were linearly detrended prior to the analysis. Oceanic current data are from the Simple Ocean Data Assimilation (SODA) dataset version v2p2p4 at 0.5° × 0.5° resolution.
