cover image: Regional Report for PICES Region 24, 23 pp.

20.500.12592/13tfpz

Regional Report for PICES Region 24, 23 pp.

31 Jan 2023

The PDO is derived from the dominant eigenvector of the covariance matrix of area- weighted monthly anomalies of SST from 20°N–65°N in the Pacific and is shown in Figure R24-3. [...] From 2009 to the end of 2013 the index remained mostly negative but became positive early in 2014, in conjunction with a marine heat wave and El Niño (Di Lorenzo and Mantua, 2016), and remained positive for the rest of the focus period. [...] Then, density was calculated and the depth at which the water was 1025.7 kg/m3 in the monthly profile (i.e., the depth of the isopycnal) was Pressure dbar Pressure dbar Pressure dbar Batten et al. [...] In the plots below, most of the years of the focus period (Figure R24-8) show a spread around the long-term mean at depth, but near-surface concentrations in spring and summer were typically below average, with the exception of 2012 (summer) and 2013 (spring). [...] At the start of the focus period their numbers were positive, following the transition to cooler conditions that occurred in 2007/08 (Figure R24-4) but towards the end of the period (2014) numbers declined.
Pages
24
Published in
Canada

Tables