North Pacific Gyre Oscillation North Pacific Gyre Oscillation synchronizes climate fluctuations in synchronizes climate fluctuations in the eastern and western the eastern and western North Pacific North Pacific Lina I. Ceballos 1 , Emanuele Di Lorenzo 1 , Niklas Schneider 2 , and Carlos D. Hoyos 1 1 School of Earth and Atmospheric Sciences, Georgia Institute of Technology 2 International Pacific Research Center, University of Hawaii at Manoa Western Pacific Geophysics Meeting, Cairns, Australia, 29 July - 1 August, 2008
North Pacific Oscillation (NPO) North Pacific Oscillation (NPO) SLPa EOF2 Atmosphere North Pacific Oscillation NPO
North Pacific Oscillation (NPO) North Pacific Oscillation (NPO) SLPa EOF2 Atmosphere North Pacific Oscillation NPO Ocean North Pacific Gyre Oscillation NPGO Di Lorenzo et al., 2008
North Pacific Gyre Oscillation (NPGO) North Pacific Gyre Oscillation (NPGO) SSHa response to NPO Ocean North Pacific Gyre Oscillation NPGO Di Lorenzo et al., 2008 SSHa from Earth Simulator ocean model (OFES) NPGO Index
North Pacific Gyre Oscillation (NPGO) North Pacific Gyre Oscillation (NPGO) SSHa response to NPO Ocean North Pacific Gyre Oscillation NPGO Di Lorenzo et al., 2008 SSHa from Earth Simulator ocean model (OFES) NPGO Index
California Current North Pacific Gyre Oscillation (NPGO) North Pacific Gyre Oscillation (NPGO) CalCOFI observations SSHa response to NPO SSHa from Earth Simulator ocean model (OFES) Di Lorenzo et al., 2008
California Current North Pacific Gyre Oscillation (NPGO) North Pacific Gyre Oscillation (NPGO) CalCOFI observations SSHa response to NPO SSHa from Earth Simulator ocean model (OFES) Di Lorenzo et al., 2008
North Pacific Gyre Oscillation (NPGO) North Pacific Gyre Oscillation (NPGO) SSHa response to NPO Is NPGO also linked to changes in the KOE? SSHa from Earth Simulator ocean model (OFES)
North Pacific Gyre Oscillation (NPGO) North Pacific Gyre Oscillation (NPGO) SSHa response to NPO Is NPGO also linked to changes in the KOE? SSHa from Earth Simulator ocean model (OFES)
North Pacific Gyre Oscillation (NPGO) North Pacific Gyre Oscillation (NPGO) SSHa response to NPO Is NPGO also linked to changes in the KOE? SSHa from Earth Simulator ocean model (OFES) Taguchi et al., 2007
Are NPGO and KOE related? Are NPGO and KOE related?
Are NPGO and KOE related? Are NPGO and KOE related? Taguchi et al., 2007
Are NPGO and KOE related? Are NPGO and KOE related? Taguchi et al., 2007 Di Lorenzo et al., 2008c
Are NPGO and KOE related? Are NPGO and KOE related? NPGO leads KOE by 3 yrs Taguchi et al., 2007 Di Lorenzo et al., 2008
Are NPGO and KOE related? Are NPGO and KOE related? Correlation NPGO-KOE mode 2 NPGO leads KOE by 3 yrs Taguchi et al., 2007 Di Lorenzo et al., 2008
Are NPGO and KOE related? Are NPGO and KOE related? transect Correlation NPGO-KOE mode 2 35.25°N NPGO leads KOE by 3 yrs Taguchi et al., 2007 Di Lorenzo et al., 2008
Are NPGO and KOE related? Are NPGO and KOE related? transect 35.25°N Eastern Western Boundary Boundary Lagged correlation KOE mode 2 vs. SSHa
Are NPGO and KOE related? Are NPGO and KOE related? transect 35.25°N Eastern Western Boundary Boundary Lagged correlation KOE mode 2 vs. SSHa
What dynamics control the westward propagation? Eastern Western Boundary Boundary Lagged correlation KOE mode 2 vs. SSHa
Rossby wave model Rossby wave model What dynamics (Qiu, 2003) control the westward ∂ ∂ h h g ' − = − c w propagation? R e ∂ ∂ t x g x ∫ − g ' x x ' ( ) = + h x , t w x ' , t dx ' ρ e c gf c R 0 R 0
Rossby wave model Rossby wave model (Qiu, 2003) Sea surface height anomaly ∂ ∂ h h g ' − = − c w R e ∂ ∂ t x g x ∫ − g ' x x ' ( ) = + h x , t w x ' , t dx ' ρ e c gf c R 0 R 0 Ekman pumping
Section 32°-38°N Rossby wave model Rossby wave model (Qiu, 2003) ∂ ∂ h h g ' − = − c w R e ∂ ∂ t x g x ∫ − g ' x x ' ( ) = + h x , t w x ' , t dx ' ρ e c gf c R 0 R 0 NCEP/NCAR monthly NCEP/NCAR monthly wind stress wind stress
Section 32°-38°N Rossby wave model Rossby wave model (Qiu, 2003) ∂ ∂ h h g ' − = − c w R e ∂ ∂ t x g x ∫ − g ' x x ' ( ) = + h x , t w x ' , t dx ' ρ e c gf c R 0 R 0 NCEP/NCAR monthly NCEP/NCAR monthly wind stress wind stress
Section 32°-38°N Rossby wave model Rossby wave model (Qiu, 2003) ∂ ∂ h h g ' − = − c w R e ∂ ∂ t x g x ∫ − g ' x x ' ( ) = + h x , t w x ' , t dx ' ρ e c gf c R 0 R 0 NCEP/NCAR monthly NCEP/NCAR monthly wind stress wind stress
Section 32°-38°N Rossby wave model Rossby wave model (Qiu, 2003) ∂ ∂ h h g ' − = − c w R e ∂ ∂ t x g x ∫ − g ' x x ' ( ) = + h x , t w x ' , t dx ' ρ e c gf c R 0 R 0 NCEP/NCAR monthly NCEP/NCAR monthly wind stress wind stress What is the role of NPO in driving SSHa in the KOE?
Modes of atmospheric variability Modes of atmospheric variability Forcing of the NPGO North Pacific Oscillation (Di Lorenzo et al., 2008; Chhak et al.,2008)
Modes of atmospheric variability Modes of atmospheric variability Aleutian mode Forcing of the NPGO North Pacific Oscillation (Di Lorenzo et al., 2008; Chhak et al.,2008)
Modes of atmospheric variability Modes of atmospheric variability Method of analysis: We decompose the wind stress field into the AL and NPO mode to drive Rossby Wave model Aleutian mode North Pacific Oscillation
Modes of atmospheric variability Modes of atmospheric variability Aleutian mode North Pacific Oscillation
Modes of atmospheric variability Modes of atmospheric variability Aleutian mode North Pacific Oscillation
Summary Summary
Summary Summary
Summary Summary
Summary Summary
Summary Summary
Are NPGO and KOE related? Are NPGO and KOE related? NPGO: strength of the KOEmode 2: strength central/eastern branch of the Kuroshio Jet 3 year lag of subtropical gyre
Are NPGO and KOE related? Are NPGO and KOE related? transect 35.25°N NPGO: strength of the KOEmode 2: strength central/eastern branch of the Kuroshio Jet 3 year lag of subtropical gyre we perform a Lagged correlation KOE mode 2 vs. SSHa
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