Atlantic-Pacific Teleconnection in Response to a weakening of the Atlantic Meridional Overturning Ci...
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Atlantic-Pacific Teleconnection in Response to a weakening of the Atlantic Meridional Overturning Circulation. Lixin Wu Physical Oceanography Laboratory Ocean University of China Qingdao, China Collaborators: Chun Li, Chunxue Yang, Changfang Fang, OUC Shang-Ping Xie, IPRC.

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Atlantic-Pacific Teleconnection in Response to a weakening of the Atlantic Meridional Overturning Circulation

Lixin Wu

Physical Oceanography Laboratory

Ocean University of China

Qingdao, China

Collaborators:

Chun Li, Chunxue Yang, Changfang Fang, OUC

Shang-Ping Xie, IPRC


Atlantic pacific extratropical and tropical teleconnection
Atlantic-Pacific of the Atlantic Meridional Overturning CirculationExtratropical and Tropical Teleconnection


Winter(JFM) Geopotential Height of the Atlantic Meridional Overturning Circulation

H

H

L

L

H

H

Z850

Z250


Surface Wind and Air Temp. of the Atlantic Meridional Overturning Circulation

Precipitation

Mild and Wet Winter


Early Winter (OND) Atmospheric Response of the Atlantic Meridional Overturning Circulation

L

H

L

Z850

Z250


FOAM Experiment of the Atlantic Meridional Overturning Circulation

(Lixin Wu, Feng He and Zhengyu Liu, 2005, GRL)


Tropical Atlantic-Pacific Bridge of the Atlantic Meridional Overturning Circulation

FMA

JJA

OND


South Atlantic Forcing of the Atlantic Meridional Overturning Circulation

FMA

JJA

OND


Predictability of the Atlantic Meridional Overturning Circulation

FMA

JJA

OND


Low of the Atlantic Meridional Overturning Circulation

Tropical Atlantic-Pacific Bridge

warm


Water hosing experiment atlantic pacific teleconnection
Water-Hosing Experiment: of the Atlantic Meridional Overturning CirculationAtlantic-Pacific Teleconnection


Water-Hosing of the Atlantic Meridional Overturning Circulation

CTRL

AMOC “ON”

AMOC “off”

10Sv

ON

SV

Collapse

Recovery

OFF

Year


Seasonality of the Atlantic Meridional Overturning Circulation

Of Atlantic

Response

  • Two questions:

  • NA-TA Atmos. Tele.

  • Ocean Heat Transport


Seasonal Response of Extratropical Atmospheric Circulation of the Atlantic Meridional Overturning Circulation

Quasi-baratropic

Baroclinic


Extratropical influence on the tropics through Atmospheric teleconnection

Coupling in the NA

No Coupling in the NA


Heat Flux, SST and Surface Wind teleconnection

year1

year2

year3

year4

year5

year6

year7

year8

year9

year10


MJJ teleconnection

ASO

NDJ


Eqautrorial teleconnection

Pacific

Annual

Cycle

No coupling in the tropical Atlantic


Seasonal response of North Pacific teleconnection

No coupling in the NA

No Northern hemispheric atmospheric Tele.




T teleconnection?

U

EQ

Coupled Propagation Mechanism:

Coupled equatorward propagation due to wind-evaporation feedback

ITCZ

West

East

Xie and Philander 1994; Wu et al. 2006 (Climate Dynamics, in press)


+NAO teleconnection?

Arctic Oscillation


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