lina i. ceballos 1 , emanuele di lorenzo 1 , niklas schneider 2 , and carlos d. hoyos 1
DESCRIPTION
North Pacific Gyre Oscillation synchronizes climate fluctuations in the eastern and western 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 - PowerPoint PPT PresentationTRANSCRIPT
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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 PacificNorth Pacific
Lina I. Ceballos1, Emanuele Di Lorenzo1, Niklas Schneider2, and Carlos D. Hoyos1
1 School of Earth and Atmospheric Sciences, Georgia Institute of Technology2 International Pacific Research Center, University of Hawaii at Manoa
Western Pacific Geophysics Meeting, Cairns, Australia, 29 July - 1 August, 2008
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North Pacific Oscillation (NPO)North Pacific Oscillation (NPO)
North Pacific Oscillation NPO
AtmosphereSLPa EOF2
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North Pacific Oscillation (NPO)North Pacific Oscillation (NPO)
North Pacific Oscillation NPO
AtmosphereSLPa EOF2
North Pacific Gyre Oscillation NPGO
Ocean
Di Lorenzo et al., 2008
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SSHa from Earth Simulator ocean model (OFES)
North Pacific Gyre Oscillation NPGO
Ocean
SSHa response to NPO
NPGO Index
North Pacific Gyre Oscillation (NPGO)North Pacific Gyre Oscillation (NPGO)
Di Lorenzo et al., 2008
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NPGO IndexSSHa from Earth Simulator ocean model (OFES)
North Pacific Gyre Oscillation NPGO
Ocean
SSHa response to NPONorth Pacific Gyre Oscillation (NPGO)North Pacific Gyre Oscillation (NPGO)
Di Lorenzo et al., 2008
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Di Lorenzo et al., 2008
California CurrentCalCOFI observations
SSHa from Earth Simulator ocean model (OFES)
SSHa response to NPONorth Pacific Gyre Oscillation (NPGO)North Pacific Gyre Oscillation (NPGO)
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Di Lorenzo et al., 2008
California CurrentCalCOFI observations
SSHa from Earth Simulator ocean model (OFES)
SSHa response to NPONorth Pacific Gyre Oscillation (NPGO)North Pacific Gyre Oscillation (NPGO)
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SSHa from Earth Simulator ocean model (OFES)
SSHa response to NPO
Is NPGO also linked to changes in the KOE?
North Pacific Gyre Oscillation (NPGO)North Pacific Gyre Oscillation (NPGO)
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SSHa from Earth Simulator ocean model (OFES)
SSHa response to NPO
Is NPGO also linked to changes in the KOE?
North Pacific Gyre Oscillation (NPGO)North Pacific Gyre Oscillation (NPGO)
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North Pacific Gyre Oscillation (NPGO)North Pacific Gyre Oscillation (NPGO)
Taguchi et al., 2007
SSHa from Earth Simulator ocean model (OFES)
SSHa response to NPO
Is NPGO also linked to changes in the KOE?
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Are NPGO and KOE related?Are NPGO and KOE related?
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Are NPGO and KOE related?Are NPGO and KOE related?
Taguchi et al., 2007
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Are NPGO and KOE related?Are NPGO and KOE related?
Taguchi et al., 2007 Di Lorenzo et al., 2008c
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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
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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
Correlation NPGO-KOE mode 2
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Are NPGO and KOE related?Are NPGO and KOE related?Correlation NPGO-KOE mode 2 transect
35.25°N
Taguchi et al., 2007 Di Lorenzo et al., 2008
NPGO leads KOE by 3 yrs
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transect35.25°N
Are NPGO and KOE related?Are NPGO and KOE related?
Lagged correlationKOE mode 2 vs. SSHa
EasternBoundary
WesternBoundary
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transect35.25°N
Are NPGO and KOE related?Are NPGO and KOE related?
Lagged correlationKOE mode 2 vs. SSHa
EasternBoundary
WesternBoundary
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EasternBoundary
WesternBoundary
What dynamics control the westward propagation?
Lagged correlationKOE mode 2 vs. SSHa
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x
Re
R
dxcxxtxw
gfcgtxh
00
'','',
Rossby wave modelRossby wave model
eR wgg
xhc
th '
(Qiu, 2003) What dynamics control the westward propagation?
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x
Re
R
dxcxxtxw
gfcgtxh
00
'','',
Rossby wave modelRossby wave model
eR wgg
xhc
th '
(Qiu, 2003) Sea surface height anomaly
Ekman pumping
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x
Re
R
dxcxxtxw
gfcgtxh
00
'','',
NCEP/NCAR monthly NCEP/NCAR monthly wind stresswind stress
eR wgg
xhc
th '
(Qiu, 2003)
Rossby wave modelRossby wave model Section 32°-38°N
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x
Re
R
dxcxxtxw
gfcgtxh
00
'','',
NCEP/NCAR monthly NCEP/NCAR monthly wind stresswind stress
eR wgg
xhc
th '
(Qiu, 2003)
Rossby wave modelRossby wave model Section 32°-38°N
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x
Re
R
dxcxxtxw
gfcgtxh
00
'','',
NCEP/NCAR monthly NCEP/NCAR monthly wind stresswind stress
eR wgg
xhc
th '
(Qiu, 2003)
Rossby wave modelRossby wave model Section 32°-38°N
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x
Re
R
dxcxxtxw
gfcgtxh
00
'','',
NCEP/NCAR monthly NCEP/NCAR monthly wind stresswind stress
eR wgg
xhc
th '
(Qiu, 2003)
Rossby wave modelRossby wave model Section 32°-38°N
What is the role of NPO in driving SSHa
in the KOE?
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North Pacific Oscillation
Modes of atmospheric variabilityModes of atmospheric variability
Forcing of the NPGO(Di Lorenzo et al., 2008;
Chhak et al.,2008)
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Aleutian mode
North Pacific Oscillation
Modes of atmospheric variabilityModes of atmospheric variability
Forcing of the NPGO(Di Lorenzo et al., 2008;
Chhak et al.,2008)
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Aleutian mode
North Pacific Oscillation
We decompose the wind stress field into the AL and NPO mode to drive Rossby Wave model
Modes of atmospheric variabilityModes of atmospheric variability
Method of analysis:
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Modes of atmospheric variabilityModes of atmospheric variability
Aleutian mode
North Pacific Oscillation
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Modes of atmospheric variabilityModes of atmospheric variability
Aleutian mode
North Pacific Oscillation
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SummarySummary
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SummarySummary
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SummarySummary
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SummarySummary
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SummarySummary
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Are NPGO and KOE related?Are NPGO and KOE related?
KOEmode 2: strength of the Kuroshio Jet
NPGO: strength of the central/eastern branch of subtropical gyre3 year lag
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Are NPGO and KOE related?Are NPGO and KOE related?transect
35.25°N
Lagged correlationKOE mode 2 vs. SSHa
we perform a
KOEmode 2: strength of the Kuroshio Jet
NPGO: strength of the central/eastern branch of subtropical gyre3 year lag