Ocean atmospheric response to north pacific wind stress forcing a coupled perspective
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Ocean-Atmospheric Response to North Pacific Wind Stress Forcing: A Coupled Perspective. Lixin Wu Physical Oceanography Laboratory Ocean University of China Qingdao, China. Collaborators: Chun Li and Liping Zhang, Ocean University of China

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Ocean atmospheric response to north pacific wind stress forcing a coupled perspective
Ocean-AtmosphericResponse to North Pacific Wind Stress Forcing: A Coupled Perspective

Lixin Wu

Physical Oceanography Laboratory

Ocean University of China

Qingdao, China

Collaborators: Chun Li and Liping Zhang, Ocean University of China

Zhengyu Liu, University of Wisconsin-Madison


Wind and SLP 77-88 and 71-76

Deser et al. (1996, J Climate)


SST and Surface wind

Curl>0

Westerly

Curl<0

76/77

Easterly

Curl<0

Curl>0



KOE SST and NPI

WSP SST and NPI

SST Lead

NPI Lead


Possible mechanism for mid 70s climate shift

After shift

Curl<0

Prior to shift

Curl>0

Possible Mechanism for mid-70s Climate Shift

40oN

30oN

Wu, Lee and Liu (2005, J. Climate)


R

Green-Function Approach


FOAM OGCM Simulation

Ocean Current upper 500m

SST anomaly

Mean

Anomaly


FOAM Coupled

Heat flux

SST

Heat flux and surface wind


FC: Current Anomalies upper 500m

Ocean Current upper 500m

Current Diff of FC&PCG

PCG: Ocean Current Anomalies upper 500m

1cm/s


1m/s

NDJ

JFM

MAM

MJJ


STC: Subtropical-tropical Cell

PCG-STC anomaly

FC-STC anomaly



Z850

Z250

PC-TP

JFM

JAS


Rossby

Cooling

WES

Cooling

STC

Summary for coupled adjustment

NP

EQ

WES-STC Relay Teleconnection

Wu et al. (2007, Clim. Dyn.)


Discussions: Understanding Coupled O/A

interaction over the Midlatitudes

1. Modeling Methodology

Roadmap: AGCM+SSTAGCM_ML+HF 

CGCM+ IV CGCM +WindStress

2. Timescale Interaction:

mean/ synoptic/ season/interannual/decadal

3. Spatial-scale Interaction: Frontal vs. Basin scale

4. Local/Remote interaction: Tropics, North Atlantic etc.


North Atlantic-North Pacific: Resonance

Li and Wu (2009, Climate Dynamics, in press)


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