Figure
3 . (a, b) Coherence and (c, d) phase maps between
gridded Farrar SSH and observed near-bottom velocity components
(Uobs and Vobs). (a, b, c, d)The left is for SSH and Uobs, and the right is for SSH
and Vobs. The region with coherences under 95%
significance level is gray-colored. (e, f, g, h) The first CEOF
mode of the spatio-temporal band-pass filtered barotropic velocity
components (Ubt, Vbt) obtained from the
numerical simulation (GLORYS12V1) during 10 years from 2004 to 2013. The
percentage of the first CEOF mode is 56.5%. The left is for
Ubt and the right is for Vbt. The upper
part is the phase and lower part is the amplitude. (e, f)Superimposed black lines are co-phase line calculated from the CEOF
phase. Black stars denote the location of the mooring observation site.(i) The time series of the amplitude of the principal component
of the first CEOF mode for the barotropic current velocity obtained from
GLORYS12V1. Niño 3.4 indices
(https://climatedataguide.ucar.edu/climate-data/nino-sst-indices-nino-12-3-34-4-oni-and-tni)
based on a 30-year data are shown using background colors. Red denotes
El Niño and blue denotes La Niña periods, respectively.