Figure 3

Time evolution of the AR and its relationship to amplification of the STIT waves for the Jan2021 events. Time points for Jan2021 are \(t=\{48,72,96,120\}\). (Left column) IVT, (Middle column) Maximum intensity project of the (3D+t) EFD mode \(\psi ^{(2)}_{v,q}(\varvec{x},t)\) computed using only the (3D+t) wind field coupled with the (3D+t) specific humidity field, (Right column) STITs \(F^{(k)}_{\varvec{\alpha }}(\varvec{x},t)\) generated from the EFD mode \(\psi ^{(2)}\), along with a \(\psi ^{(2)}\). The AR that impacted CA is shown in the white boxes (IVT and EFD), and is appears to be associated with the STIT wave exit region in the red box (STIT). The depth of the STIT wave, and the corresponding steepness of the exit region, are correlated with the strength of the AR as estimated by EFD. Indeed, the AR that hit CA was significantly less powerful that the Western AR over the North Pacific (labeled with green and yellow boxes). STIT coloring is arbitrary and optimized for visualization. Time is hours since 2021-01-22 00Z.