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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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slide1

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

slide5

Surface Wind and Air Temp.

Precipitation

Mild and Wet Winter

slide7

FOAM Experiment

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

slide11

Low

Tropical Atlantic-Pacific Bridge

warm

slide13

Water-Hosing

CTRL

AMOC “ON”

AMOC “off”

10Sv

ON

SV

Collapse

Recovery

OFF

Year

slide16

Seasonality

Of Atlantic

Response

  • Two questions:
  • NA-TA Atmos. Tele.
  • Ocean Heat Transport
slide18

Extratropical influence on the tropics through Atmospheric teleconnection

Coupling in the NA

No Coupling in the NA

slide19

Heat Flux, SST and Surface Wind

year1

year2

year3

year4

year5

year6

year7

year8

year9

year10

slide20

MJJ

ASO

NDJ

slide21

Eqautrorial

Pacific

Annual

Cycle

No coupling in the tropical Atlantic

slide22

Seasonal response of North Pacific

No coupling in the NA

No Northern hemispheric atmospheric Tele.

slide25

T

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)

slide26

+NAO

Arctic Oscillation

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