!. Avtˆ…rã, r‘r€ƒyrÃ qrÃ p‚€ƒh…hv†‚Ã ƒ‚ˆ…Ã yrÃ p‚ˆ…h‡Ã “‚hyÃ rÃ €†Ã jÃ y ¶p„ˆh‡rˆ…Ã r‡…rÃ yr†Ã q‚pr† U6PÃ p‚ˆ…h‡‚€q‡…r†Ã rÃ ‚v…Ã r‡Ã yhÃ †v€ˆyh‡v‚Ã PQ6@STÃ rÃ …‚ˆtrÃ rÃ uhˆ‡Ã jÃ %$ƒ@Ã r‡Ã $Ã €Ã qr ƒ…‚s‚qrˆ…Ãp‚……pyh‡v‚Ã)Ã

. 'ã0ãs€†qvsã-)-Ã-!-'ã€†-@‰h†ã-r‡ã-hy, Despite their poor spatial density, these reconstructions offer a precious glimpse at past climate trends and variations, which can improve our understanding of present-day variations. In the future, it appears important to maintain a strong climate observation network, in order to have longer good-quality data series, 2001.

G. Srsr…rpr†-alory, Redistribution zonale et méridienne de masse aux échelles ENSO et décennale dans le Pacifique tropical, Thèse de l'université Paris VI, 145 pp, 2002.

C. Cabanes, A. Cazenave, and &. Provost, Sea Level Rise During Past 40 Years Determined from Satellite and in Situ Observations, Science, vol.294, issue.5543, pp.840-842, 2001.
DOI : 10.1126/science.1063556

V. J. Cardone, J. G. Greenwood, and &. M. , Cane, On trends in historical marine wind data, J

J. A. Carton, G. Chepurin, and X. Cao, A Simple Ocean Data Assimilation Analysis of the Global Upper Ocean 1950???95. Part I: Methodology, Journal of Physical Oceanography, vol.30, issue.2, pp.294-309, 2000.
DOI : 10.1175/1520-0485(2000)030<0294:ASODAA>2.0.CO;2

A. J. Clarke and A. Lebedev, Long-Term Changes in the Equatorial Pacific Trade Winds, Journal of Climate, vol.9, issue.5
DOI : 10.1175/1520-0442(1996)009<1020:LTCITE>2.0.CO;2

A. T. Cox and V. R. Swail, A global wave hindcast over the period, 1958.

D. Silva, A. M. , C. C. Young, and S. Levitus, Atlas of surface marine data, Algorithms and procedures NOAA Atlas NESDIS, vol.1, issue.83, 1994.

A. V. Fedorov and . Philander, Is El Nino Changing?, Science, vol.288, issue.5473, 1997.
DOI : 10.1126/science.288.5473.1997

N. E. Graham, Decadal-scale climate variability in the tropical and North Pacific during the 1970s and 1980s: observations and model results, Climate Dynamics, vol.10, issue.3, pp.135-162, 1994.
DOI : 10.1007/BF00210626

D. F. Gu and . Philander, Interdecadal Climate Fluctuations That Depend on Exchanges Between the Tropics and Extratropics, Science, vol.275, issue.5301, pp.805-807, 1997.
DOI : 10.1126/science.275.5301.805

W. Hazeleger, M. Visbeck, M. Cane, A. Karspeck, and &. N. Naik, Decadal upper ocean temperature variability in the tropical Pacific, Journal of Geophysical Research: Oceans, vol.10, issue.C5, pp.8971-8988, 2001.
DOI : 10.1029/2000JC000536

M. Ebisuzaki, V. Kanamitsu, H. Kousky, R. Dool, &. M. Jenne et al., The NCEP/NCAR 50-year reanalysis, Bull. Am. Meteorol. Soc, vol.82, pp.247-268, 2001.

R. Kleeman, J. P. Mccreary, and &. B. Klinger, A mechanism for generating ENSO decadal variability, Geophysical Research Letters, vol.11, issue.12, pp.1743-1746, 1999.
DOI : 10.1029/1999GL900352

D. M. Legler and J. J. O-'brien, Tropical Pacific wind stress analysis for TOGA, IOC Time series of ocean measurements, IOC Technical Series 33, 1988.

S. Levitus, and co-authors, NODC World Ocean Atlas 1998 data

Z. Liu and B. Huang, Cause of the tropical Pacific warming, Geophys. Res. Lett, vol.27, 1935.

G. Madec, P. Delecluse, M. Imbard, and C. Levy, OPA 8.1 Ocean General Circulation Model reference manual, Notes du pôle de modélisation 11, p.91, 1998.
URL : https://hal.archives-ouvertes.fr/hal-00154217

J. P. Mccreary and . Lu, Interaction between the subtropical and equatorial ocean circulations: the subtropical cell, J. Phys. Oceanogr, vol.24, pp.466-497, 1994.

M. J. Mcphaden and . Zhang, Slowdown of the meridional overturning circulation in the upper Pacific Ocean, Nature, vol.415, issue.6872, pp.603-608, 2002.
DOI : 10.1038/415603a

. Takeuchi, The Tropical Ocean Global Atmosphere observing system: A decade of progress, J

N. J. Mantua and S. R. Hare, The Pacific Decadal Oscillation, Journal of Oceanography, vol.58, issue.1, pp.35-44, 2002.
DOI : 10.1023/A:1015820616384

T. S. Nitta and . Yamada, Recent warming of tropical sea surface temperature and its relationship to the northern hemisphere circulation, Decadal variations in the Subtropical Cells and equatorial Pacific SST, pp.375-383, 1029.

D. Pierce, T. Barnett, and &. M. Latif, Connections between the Pacific Ocean Tropics and Midlatitudes on Decadal Timescales, Journal of Climate, vol.13, issue.6, pp.1173-1194, 2000.
DOI : 10.1175/1520-0442(2000)013<1173:CBTPOT>2.0.CO;2

E. S. Posmentier, M. A. Cane, and &. S. Zebiak, Tropical Pacific climate trends since, 1960.
DOI : 10.1175/1520-0442(1989)002<0731:tpcts>2.0.co;2

W. M. Putman, D. M. Legler, and J. J. O-'brien, Interannual Variability of Synthesized FSU and NCEP-NCAR Reanalysis Pseudostress Products over the Pacific Ocean, Journal of Climate, vol.13, issue.16, pp.3003-3016, 2000.
DOI : 10.1175/1520-0442(2000)013<3003:IVOSFA>2.0.CO;2

J. P. Rebert, J. R. Donguy, and &. G. Eldin, Relations between sea level, thermocline depth, heat content, and dynamic height in the tropical Pacific Ocean, Journal of Geophysical Research, vol.12, issue.C4, pp.719-730, 1985.
DOI : 10.1029/JC090iC06p11719

K. B. Rodgers, B. Blanke, G. Madec, O. Aumont, P. Ciais et al., Extratropical sources of Equatorial Pacific upwelling in an OGCM, Geophysical Research Letters, vol.23, issue.2, pp.10-1029, 2003.
DOI : 10.1029/2002GL016003
URL : https://hal.archives-ouvertes.fr/hal-00172862

N. S. Schneider, A. J. Miller, M. A. Alexander, and C. Deser, Subduction of Decadal North Pacific Temperature Anomalies: Observations and Dynamics, Journal of Physical Oceanography, vol.29, issue.5, pp.1056-1070, 1990.
DOI : 10.1175/1520-0485(1999)029<1056:SODNPT>2.0.CO;2

R. Wu and S. Xie, On equatorial Pacific surface wind changes around, 1977.

. Clim, -1 . Dashed isolines denote negative values. Crosses indicate the location of the 10 tide gauge stations used in this study, pp.1004-1020, 1997.

!. Avtˆ…rã, Comparison of interannual sea level variations (mm) as simulated by OPA model (dotted line : detrended ; dashed line : not detrended) and as observed by tide gauges (full line) at the 10 tropical Pacific islands reported on figure 1

. Avtˆ…rã, Ã) Interannual variations of 0/500 m dynamic height (cm) in simulations INT

#. Avtˆ…rã, Linear trend in NCEP zonal wind (10 -3 .N.m -2 .yr -1 ) in the tropical Pacific on the 1951- 1999 period. Isolines are drawn every 0

$. Avtˆ…rã and . °c-), ÃDecadal variations of simulated interior pycnocline convergence in the 9°N-9°S zonal band (full line, 10 6 .m 3 .s -1 ), simulated SST in the 9°N-9°S, 90°W-180°W box (da shed line, °C), and NCEP SST in the same box

Ã. Avtˆ…rã and . Linear, 500 m dynamic height (mm.yr -1 ) in the tropical Pacific on the 1951- 1999 period : (a) as simulated by OPA model and (b) as estimated from Levitus data. Isolines are drawn every 0.5 mm.yr -1 . Dashed isolines denote negative values, Crosses indicate the location of the 10 tide gauge stations used in this study

. Avtˆ…rã, Ã) Interannual variations of 0/500 m dynamic height (cm) in simulations INT

#. Avtˆ…rã, Linear trend in NCEP zonal wind (10 -3 .N.m -2 .yr -1 ) in the tropical Pacific on the 1951- 1999 period. Isolines are drawn every 0

G. Alory, Redistribution zonale et méridienne de masse aux échelles ENSO et décennale dans le Pacifique tropical, Thèse de l'université Paris VI, 145 pp, 2002.

G. Alory and T. Delcroix, Interannual sea level changes and associated mass transports in the tropical Pacific from TOPEX/Poseidon data and linear model results, E Br‚ƒu’†ÃSr†Ã &Ã2003, 1964.

S. An and I. Kang, A Further Investigation of the Recharge Oscillator Paradigm for ENSO Using a Simple Coupled Model with the Zonal Mean and Eddy Separated, Journal of Climate, vol.13, issue.11, 1987.
DOI : 10.1175/1520-0442(2000)013<1987:AFIOTR>2.0.CO;2

S. An and B. Wang, Interdecadal Change of the Structure of the ENSO Mode and Its Impact on the ENSO Frequency*, Journal of Climate, vol.13, issue.12, 2000.
DOI : 10.1175/1520-0442(2000)013<2044:ICOTSO>2.0.CO;2

D. S. Battisti and A. C. Hirst, Interannual variability in the tropical atmosphere-ocean system: Influence of the basic state and ocean geometry

J. Bjerknes, Atmospheric teleconnections from the equatorial Pacific, H‚Ã XrhÃ Sr‰Ã

B. Blanke and P. Delecluse, Variability of the Tropical Atlantic Ocean Simulated by a General Circulation Model with Two Different Mixed-Layer Physics, Journal of Physical Oceanography, vol.23, issue.7, pp.1363-1388, 1993.
DOI : 10.1175/1520-0485(1993)023<1363:VOTTAO>2.0.CO;2
URL : https://hal.archives-ouvertes.fr/hal-01143309

B. Blanke and S. Raynaud, Kinematics of the Pacific Equatorial Undercurrent: An Eulerian and Lagrangian Approach from GCM Results, Journal of Physical Oceanography, vol.27, issue.6, pp.1038-1053, 1997.
DOI : 10.1175/1520-0485(1997)027<1038:KOTPEU>2.0.CO;2
URL : https://hal.archives-ouvertes.fr/hal-01143304

B. Blanke, M. Arhan, G. Madec, and S. Roche, Warm Water Paths in the Equatorial Atlantic as Diagnosed with a General Circulation Model, Journal of Physical Oceanography, vol.29, issue.11, pp.2753-2768, 1999.
DOI : 10.1175/1520-0485(1999)029<2753:WWPITE>2.0.CO;2
URL : https://hal.archives-ouvertes.fr/hal-00172802

J. Boulanger and C. Menkes, Long equatorial wave reflection in the Pacific Ocean from TOPEX/POSEIDON data during the 1992-1998 period, Climate Dynamics, vol.15, issue.3, 1999.
DOI : 10.1007/s003820050277
URL : https://hal.archives-ouvertes.fr/hal-00772197

E. C. Brady, Interannual variability of meridional heat transport in a numerical model of the upper equatorial Pacific ocean, EÃQu’†Pprh‚t…, pp.2675-2694, 1994.

E. Brady, C. , and P. R. Gent, The Seasonal Cycle of Meridional Heat Transport in a Numerical Model of the Pacific Equatorial Upwelling Zone, Journal of Physical Oceanography, vol.24, issue.12, pp.2658-2673, 1994.
DOI : 10.1175/1520-0485(1994)024<2658:TSCOMH>2.0.CO;2

H. L. Bryden and E. C. Brady, Diagnostic Model of the Three-Dimensional Circulation in the Upper Equatorial Pacific Ocean, Journal of Physical Oceanography, vol.15, issue.10, pp.1255-1273, 1985.
DOI : 10.1175/1520-0485(1985)015<1255:DMOTTD>2.0.CO;2

H. L. Bryden and E. C. Brady, Eddy momentum and heat fluxes and their effects on the circulation of the equatorial Pacific Ocean, Journal of Marine Research, vol.47, issue.1, pp.47-5579, 1989.
DOI : 10.1357/002224089785076389

A. Capotondi and M. A. Alexander, Rossby waves in the tropical North Pacific and their role in decadal thermocline variability, EÃQu’†ÃPprh‚t…Ã, pp.3496-3515, 2001.

D. B. Chelton, M. G. Schlax, J. M. Lyman, and G. C. Johnson, Equatorially trapped Rossby waves in the presence of meridionally sheared baroclinic flow in the Pacific Ocean, Progress in Oceanography, vol.56, issue.2, pp.323-380, 2003.
DOI : 10.1016/S0079-6611(03)00008-9

A. J. Clarke and A. Lebedev, Long-Term Changes in the Equatorial Pacific Trade Winds, Journal of Climate, vol.9, issue.5, pp.1020-1029, 1996.
DOI : 10.1175/1520-0442(1996)009<1020:LTCITE>2.0.CO;2

T. Correge, T. Delcroix, J. Recy, W. Beck, G. Cabioch et al., Evidence for stronger El Ni??o-Southern Oscillation (ENSO) Events in a Mid-Holocene massive coral, Paleoceanography, vol.264, issue.7
DOI : 10.1029/1999PA000409

S. Cravatte, J. Picaut, and G. Eldin, Secaond and first baroclinic Kelvin modes in the equatorial Pacific at intraseasonal timescalesÃEÃBr‚ƒu’†ÃSr† accepted, 2003.

T. Delcroix, J. Picaut, and G. Eldin, Equatorial Kelvin and Rossby waves evidenced in the Pacific Ocean through Geosat sea level and surface current anomalies, Journal of Geophysical Research, vol.95, issue.suppl., pp.3249-3262, 1991.
DOI : 10.1029/90JC01758

C. Deser, M. A. Alexander, and M. S. Timlin, Upper-ocean thermal variations in the North Pacific during, 1840.

A. V. Fedorov and S. G. Philander, Is El Niño changing?, TpvrprÃ!, 1997.
DOI : 10.1126/science.288.5473.1997

R. Fine, J. L. Reid, and H. G. Östlund, Circulation of Tritium in the Pacific Ocean, Journal of Physical Oceanography, vol.11, issue.1, pp.3-14, 1981.
DOI : 10.1175/1520-0485(1981)011<0003:COTITP>2.0.CO;2

R. Fine, W. Peterson, and H. Ostlund, The penetration of tritium into the tropical PacificÃE Qu’†ÃPprh‚t…Ã &, pp.553-564, 1987.

E. Firing, R. Lukas, J. Sadler, and K. Wyrtki, Equatorial Undercurrent Disappears During 1982-1983 El Nino, Science, vol.222, issue.4628, pp.1121-1123, 1983.
DOI : 10.1126/science.222.4628.1121

B. S. Giese, S. C. Urizar, and N. S. Fuckar, The Southern Hemisphere origins of the, p.2002, 1976.

L. Goddard and S. G. Philander, The Energetics of El Ni??o and La Ni??a, Journal of Climate, vol.13, issue.9, 1496.
DOI : 10.1175/1520-0442(2000)013<1496:TEOENO>2.0.CO;2

D. F. Gu and S. G. Philander, Interdecadal Climate Fluctuations That Depend on Exchanges Between the Tropics and Extratropics, Science, vol.275, issue.5301, pp.805-807, 1997.
DOI : 10.1126/science.275.5301.805

T. P. Guilderson and D. P. Schrag, Abrupt shift in subsurface temperatures in the tropical Pacific associated with changes in El Niño, pp.240-243, 1998.

S. P. Hayes, L. J. Mangum, J. Picaut, A. Sumi, and K. Takeuchi, TOGA-TAO: A Moored Array for Real-time Measurements in the Tropical Pacific Ocean, Bulletin of the American Meteorological Society, vol.72, issue.3, pp.7-13, 1991.
DOI : 10.1175/1520-0477(1991)072<0339:TTAMAF>2.0.CO;2

W. Hazeleger, P. De-vries, and G. J. Van-oldenborgh, Do tropical cells ventilate the Indo-Pacific Equatorial Thermocline?, Geophysical Research Letters, vol.14, issue.9, pp.1763-1766, 2000.
DOI : 10.1029/2000GL012362

W. Hazeleger, M. Visbeck, M. Cane, A. Karspeck, and &. N. Naik, Decadal upper ocean temperature variability in the tropical PacificÃEÃBr‚ƒu’†ÃSr†Ã %, pp.8971-8988, 2001.

R. X. Huang and Q. Wang, Interior communication from the subtropical to the tropical oceans, EÃQu’†ÃPprh‚t…Ã, pp.3538-3550, 2001.

T. Izumo, J. Picaut, and B. Blanke, Tropical pathways, equatorial undercurrent variability and the, pp.10-1029, 1998.
URL : https://hal.archives-ouvertes.fr/hal-00172842

F. Jin, An Equatorial Ocean Recharge Paradigm for ENSO. Part I: Conceptual Model, Journal of the Atmospheric Sciences, vol.54, issue.7, pp.811-829, 1997.
DOI : 10.1175/1520-0469(1997)054<0811:AEORPF>2.0.CO;2

F. Jin, An Equatorial Ocean Recharge Paradigm for ENSO. Part II: A Stripped-Down Coupled Model, Journal of the Atmospheric Sciences, vol.54, issue.7, pp.830-847, 1997.
DOI : 10.1175/1520-0469(1997)054<0830:AEORPF>2.0.CO;2

G. C. Johnson, The Pacific Ocean Subtropical cell surface limb, Geophysical Research Letters, vol.24, issue.9, pp.1771-1774, 2001.
DOI : 10.1029/2000GL012723

G. C. Johnson and M. J. Mcphaden, Interior Pycnocline Flow from the Subtropical to the Equatorial Pacific Ocean*, Journal of Physical Oceanography, vol.29, issue.12
DOI : 10.1175/1520-0485(1999)029<3073:IPFFTS>2.0.CO;2

G. C. Johnson, M. J. Mcphaden, G. D. Rowe, and K. E. Mctaggart, Upper equatorial Pacific Ocean current and salinity variability during the 1996-1998 El Ni??o-La Ni??a cycle, Journal of Geophysical Research: Oceans, vol.19, issue.C1, pp.1037-1053, 2000.
DOI : 10.1029/1999JC900280

G. C. Johnson, M. J. Mcphaden, and E. Firing, Equatorial Pacific ocean horizontal velocity, divergence, and upwelling, EQu’†Pprh‚t…Ã, pp.839-849, 2001.
DOI : 10.1175/1520-0485(2001)031<0839:epohvd>2.0.co;2

G. C. Johnson, B. M. Sloyan, W. S. Kessler, and K. E. Mctaggart, Direct measurements of upper ocean currents and water properties across the tropical Pacific Ocean during the 1990's, Q…‚tPprh‚t…, pp.31-61, 2002.

M. A. Karspeck and . Cane, Tropical Pacific 1976???77 Climate Shift in a Linear, Wind-Driven Model*, Journal of Physical Oceanography, vol.32, issue.8, pp.2350-2360, 2002.
DOI : 10.1175/1520-0485(2002)032<2350:TPCSIA>2.0.CO;2

W. Kessler and M. Mcphaden, The 1991-1993 En Niño in the central Pacific, pp.295-333, 1995.

W. S. Kessler, Is ENSO a cycle or a series of events?, Geophysical Research Letters, vol.105, issue.C3, pp.10-1029, 2002.
DOI : 10.1029/2002GL015924

R. Kistler, E. Kalnay, W. Collins, S. Saha, G. White et al., The NCEP???NCAR 50???Year Reanalysis: Monthly Means CD???ROM and Documentation, Bulletin of the American Meteorological Society, vol.82, issue.2, pp.247-268, 2001.
DOI : 10.1175/1520-0477(2001)082<0247:TNNYRM>2.3.CO;2

R. Kleeman, J. P. Mccreary-jr, and B. A. Klinger, A mechanism for the decadal variation of ENSO, pp.1743-1746, 1999.

B. A. Klinger, J. P. Mccreary, and R. Kleeman, The relationship between oscillating subtropical wind stress and equatorial temperatureÃ EÃ Qu’†Ã Pprh‚t…Ã, pp.1507-1521, 2002.

T. R. Knutson and S. Manabe, Model Assessment of Decadal Variability and Trends in the Tropical Pacific Ocean, Journal of Climate, vol.11, issue.9, p.8, 1998.
DOI : 10.1175/1520-0442(1998)011<2273:MAODVA>2.0.CO;2

J. Kug, I. Kang, and S. An, Symmetric and antisymmetric mass exchanges between the equatorial and off-equatorial Pacific associated with ENSOÃ EÃ Br‚ƒu’†Ã Sr†, p.3284, 2003.

T. Izumo, J. Picaut, and B. Blanke, Tropical pathways, equatorial undercurrent variability and the, 1998.
URL : https://hal.archives-ouvertes.fr/hal-00172842

M. Latif and T. P. Barnett, Causes of decadal climate variability over the north Pacific and North AmericaÃTpvrprÃ!%%, pp.634-637, 1994.

T. Lee, I. Fukumori, D. Menemenlis, and L. Fu, Interannual-to-decadal Variation of Tropical-subtropical Exchange in the Pacific Ocean: Boundary Versus Interior Pathways, poster à l'ocean sciences meeting de l'AGU, 2002.

T. Lee and I. Fukumori, Interannual-to-Decadal Variations of Tropical???Subtropical Exchange in the Pacific Ocean: Boundary versus Interior Pycnocline Transports, Journal of Climate, vol.16, issue.24, pp.4022-4042, 2003.
DOI : 10.1175/1520-0442(2003)016<4022:IVOTEI>2.0.CO;2

M. Lengaigne, J. Boulanger, C. Menkes, S. Masson, G. Madec et al., Ocean response to the, Westerly Wind Event. EÃBr‚ƒu’†ÃSr†, 1997.
URL : https://hal.archives-ouvertes.fr/hal-00916315

Z. Liu, A Simple Model of the Mass Exchange between the Subtropical and Tropical Ocean, Journal of Physical Oceanography, vol.24, issue.6, pp.1153-1165, 1994.
DOI : 10.1175/1520-0485(1994)024<1153:ASMOTM>2.0.CO;2

Z. Liu, S. H. Philander, and R. C. Pacanowski, A GCM Study of Tropical???Subtropical Upper-Ocean Water Exchange, Journal of Physical Oceanography, vol.24, issue.12, 1994.
DOI : 10.1175/1520-0485(1994)024<2606:AGSOTU>2.0.CO;2

Z. Liu and S. H. Philander, How different wind stress patterns affect the tropicalsubtropical circulations of the upper ocean, pp.449-462, 1995.

P. Lu and J. Mccreary, Influence of the ITCZ on the Flow of Thermocline Water from the Subtropical to the Equatorial Pacific Ocean, Journal of Physical Oceanography, vol.25, issue.12, pp.3076-3088, 1995.
DOI : 10.1175/1520-0485(1995)025<3076:IOTIOT>2.0.CO;2

P. Lu, J. P. Mccreary, and B. A. Klinger, Meridional Circulation Cells and the Source Waters of the Pacific Equatorial Undercurrent, Journal of Physical Oceanography, vol.28, issue.1, pp.62-64, 1998.
DOI : 10.1175/1520-0485(1998)028<0062:MCCATS>2.0.CO;2

J. Luo and T. Yamagata, Long-term El Niño-southern oscilalation (ENSO)-like variation with special emphasis on the South Pacific, EÃ Br‚ƒuÃ Sr†Ã %Ã, vol.8, pp.22211-22227, 2001.

G. Madec and M. Imbard, A global ocean mesh to overcome the North Pole singularity, Climate Dynamics, vol.12, issue.6, pp.8-9, 1996.
DOI : 10.1007/BF00211684
URL : https://hal.archives-ouvertes.fr/hal-00154220

C. Maes, G. Madec, and P. Delecluse, Sensitivity of an Equatorial Pacific OGCM to the Lateral Diffusion, Monthly Weather Review, vol.125, issue.5, pp.958-971, 1997.
DOI : 10.1175/1520-0493(1997)125<0958:SOAEPO>2.0.CO;2

N. J. Mantua, S. R. Hare, Y. Zhang, J. M. Wallace, and R. C. Francis, A Pacific Interdecadal Climate Oscillation with Impacts on Salmon Production, Bulletin of the American Meteorological Society, vol.78, issue.6, pp.1069-1079, 1997.
DOI : 10.1175/1520-0477(1997)078<1069:APICOW>2.0.CO;2

N. J. Mantua and S. R. Hare, The Pacific Decadal Oscillation, EÃPprh‚t…, vol.58, pp.35-44, 2002.

F. Marin, B. L. Hua, and S. Wacongne, The equatorial thermostad and subsurface countercurrents in the light of the dynamics of atmospheric Hadley cells, Journal of Marine Research, vol.58, issue.3, pp.405-437, 2000.
DOI : 10.1357/002224000321511098

J. P. Mccreary, A Linear Stratified Ocean Model of the Equatorial Undercurrent, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol.298, issue.1444, pp.603-635, 1981.
DOI : 10.1098/rsta.1981.0002

J. P. Mccreary and P. Lu, Interaction between the subtropical and equatorial ocean circulations -The subtropical cell, pp.455-497, 1994.

M. J. Mcphaden, The equatorial Undercurrent: 100 years of discovery, pp.762-765, 1986.

M. J. Mcphaden and B. A. Taft, Dynamics of Seasonal and Intraseasonal Variability in the Eastern Equatorial Pacific, Journal of Physical Oceanography, vol.18, issue.11, p.1988
DOI : 10.1175/1520-0485(1988)018<1713:DOSAIV>2.0.CO;2

M. J. Mcphaden, Trade wind fetch-related variations in equatorial undercurrent depth, speed, and transport, Journal of Geophysical Research: Oceans, vol.211, issue.C2, pp.2555-2559, 1993.
DOI : 10.1029/92JC02683

M. J. Mcphaden, Genesis and evolution of the 1997-98 El Niño, TpvrprÃ !', pp.950-954, 1999.

M. J. Mcphaden and X. Yu, Equatorial waves and the 1997-98 El Ni??o, Geophysical Research Letters, vol.29, issue.19, 1999.
DOI : 10.1029/1999GL004901

M. J. Mcphaden, Mixed layer temperature balance on intraseasonal time scales in the equatorial Pacific Ocean

M. J. Mcphaden and D. Zhang, Slowdown of the meridional overturning circulation in the upper Pacific Ocean, Nature, vol.415, issue.6872, pp.603-608, 2002.
DOI : 10.1038/415603a

M. J. Mcphaden and C. , The Tropical Ocean Global Atmosphere (TOGA) observing system: A decade of progress, pp.14169-14240, 1998.

C. S. Meinen and M. J. Mcphaden, Observations of Warm Water Volume Changes in the Equatorial Pacific and Their Relationship to El Ni??o and La Ni??a, Journal of Climate, vol.13, issue.20, 2000.
DOI : 10.1175/1520-0442(2000)013<3551:OOWWVC>2.0.CO;2

C. S. Meinen and M. J. Mcphaden, Interannual variability in warm water volume transports in the equatorial Pacific during, 1324.

C. S. Meinen, M. J. Mcphaden, and G. C. Johnson, Vertical Velocities and Transports in the Equatorial Pacific during 1993???99*, Journal of Physical Oceanography, vol.31, issue.11, pp.3230-3248, 2001.
DOI : 10.1175/1520-0485(2001)031<3230:VVATIT>2.0.CO;2

A. J. Miller and N. Schneider, Interdecadal climate regime dynamics in the North Pacific Ocean: theories, observations and ecosystem impacts, Progress in Oceanography, vol.47, issue.2-4, pp.355-379, 2000.
DOI : 10.1016/S0079-6611(00)00044-6

M. Nonaka, S. Xie, and J. P. Mccreary, Decadal variations in the subtropical cells and equatorial pacific SST, Geophysical Research Letters, vol.10, issue.7, pp.10-1029, 2002.
DOI : 10.1029/2001GL013717

J. Pedlosky, An inertial theory of the equatorial undercurrent, EÃ Qu’†Ã Pprh‚t…Ã &, 1978.

J. Picaut and R. Tournier, Monitoring the 1979-1985 equatorial Pacific current transports with bathythermograph dataÃEÃBr‚ƒu’†ÃSr†Ã, p.1991

J. Picaut, M. Ioualalen, C. Menkes, T. Delcroix, and M. J. Mcphaden, Mechanism of the Zonal Displacements of the Pacific Warm Pool: Implications for ENSO, Science, vol.274, issue.5292, pp.1486-1489, 1996.
DOI : 10.1126/science.274.5292.1486
URL : https://hal.archives-ouvertes.fr/hal-00772206

J. Picaut, F. Masia, and Y. Du-penhoat, An Advective-Reflective Conceptual Model for the Oscillatory Nature of the ENSO, Science, vol.277, issue.5326, pp.663-666, 1997.
DOI : 10.1126/science.277.5326.663

J. Picaut, E. Hackert, A. J. Busalacchi, R. Murtugudde, and G. S. Lagerloef, Mechanisms of the 1997???1998 El Ni??o???La Ni??a, as inferred from space-based observations, Journal of Geophysical Research, vol.26, issue.C5
DOI : 10.1029/2001JC000850

. Plimpton, Correcting moored ADCP data for fish-bias errors at 0°, 110°W and 0°, 140°W from, p.49, 1990.

. Plimpton, ADCP Velocity Errors from Pelagic Fish Schooling around Equatorial Moorings*, Journal of Atmospheric and Oceanic Technology, vol.14, issue.5, p.1212, 1997.
DOI : 10.1175/1520-0426(1997)014<1212:AVEFPF>2.0.CO;2

L. Qiao and R. H. Weisberg, The Zonal Momentum Balance of the Equatorial Undercurrent in the Central Pacific, Journal of Physical Oceanography, vol.27, issue.6, pp.1094-1119, 1997.
DOI : 10.1175/1520-0485(1997)027<1094:TZMBOT>2.0.CO;2

W. H. Quinn, V. T. Neal, and S. E. , El Ni??o occurrences over the past four and a half centuries, Journal of Geophysical Research, vol.28, issue.1, pp.14449-14461, 1987.
DOI : 10.1029/JC092iC13p14449

J. L. Reid, On the total geostrophic circulation of the Pacific Ocean: flow patterns, tracers, and transports, Q…‚tÃPprh‚t…, vol.39, pp.263-352, 1997.

G. Reverdin, C. Frankignoul, E. Kestenare, and M. J. Mcphaden, Seasonal variability in the surface currents of the equatorial Pacific, Journal of Geophysical Research, vol.90, issue.5, pp.20323-20344, 1994.
DOI : 10.1029/94JC01477

R. W. Reynolds and T. M. Smith, Improved Global Sea Surface Temperature Analyses Using Optimum Interpolation, Journal of Climate, vol.7, issue.6
DOI : 10.1175/1520-0442(1994)007<0929:IGSSTA>2.0.CO;2

R. A. Richardson, I. Ginis, and L. M. Rothstein, A Numerical Investigation of the Local Ocean Response to Westerly Wind Burst Forcing in the Western Equatorial Pacific, Journal of Physical Oceanography, vol.29, issue.6, pp.1334-1352, 1999.
DOI : 10.1175/1520-0485(1999)029<1334:ANIOTL>2.0.CO;2

K. B. Rodgers, M. A. Cane, N. H. Naik, and D. P. Schrag, The role of the Indonesian throughflow in equatorial Pacific thermocline ventilation, EÃ Br‚ƒu’†Ã Sr†Ã, 1999.

N. S. Schneider, A. J. Miller, M. A. Alexander, and C. Deser, Subduction of Decadal North Pacific Temperature Anomalies: Observations and Dynamics, Journal of Physical Oceanography, vol.29, issue.5, pp.1056-1070, 1999.
DOI : 10.1175/1520-0485(1999)029<1056:SODNPT>2.0.CO;2

J. Sirven, The equatorial undercurrent in a two layer shallow water model, Journal of Marine Systems, vol.9, issue.3-4, pp.171-186, 1996.
DOI : 10.1016/S0924-7963(96)00041-3

B. M. Sloyan, G. C. Johnson, and W. S. Kessler, The Pacific cold tongue: An indicator of hemispheric exchange, EQu’†Pprh‚t…, vol.33, issue.5, pp.1027-1043, 2003.

S. R. Springer, M. J. Mcphaden, and A. J. Busalacchi, Oceanic heat content variability in the tropical Pacific during the 1982???1983 El Ni??o, Journal of Geophysical Research, vol.115, issue.C12, pp.22089-22101, 1990.
DOI : 10.1029/JC095iC12p22089

D. Sun, The heat sources and sinks of the 1986-87 El Niño, EÃ 8yv€h‡rÃ, 2000.

D. Sun, A Possible Effect of an Increase in the Warm-Pool SST on the Magnitude of El Ni??o Warming, Journal of Climate, vol.16, issue.2, 2003.
DOI : 10.1175/1520-0442(2003)016<0185:APEOAI>2.0.CO;2

A. Timmermann, Decadal ENSO amplitude modulation: a nonlinear paradigm, By‚iÃ Qyh 8uhtrÃ, pp.135-156, 2003.

Y. Tourre, B. Rajagopalan, Y. Kushnir, M. Barlow, and W. B. White, Patterns of coherent decadal and interdecadal climate signals in the Pacific basin during the 20 th century, 2001.

J. Vialard, C. Menkes, J. P. Boulanger, P. Delecluse, E. Guilyardi et al., Oceanic mechanisms driving the Sea Surface Temperature during the 1997-1998 El Niño, pp.1649-1675, 2001.

S. Wacongne, Dynamical regimes of a fully nonlinear stratified model of the Atlantic equatorial undercurrent, Journal of Geophysical Research, vol.322, issue.C4, pp.4801-4815, 1989.
DOI : 10.1029/JC094iC04p04801

S. Wacongne, On the Difference in Strength between Atlantic and Pacific Undercurrents, Journal of Physical Oceanography, vol.20, issue.5, pp.792-799, 1990.
DOI : 10.1175/1520-0485(1990)020<0792:OTDISB>2.0.CO;2

C. Wang, A unified oscillator model for the El Niño-Southern Oscillation, E‚ˆ…hyÃ ‚s, p.8

C. Wang and R. H. Weisberg, The 1997???98 El Ni??o Evolution Relative to Previous El Ni??o Events, Journal of Climate, vol.13, issue.2, pp.488-501, 2000.
DOI : 10.1175/1520-0442(2000)013<0488:TENOER>2.0.CO;2

B. Wang and S. I. An, A mechanism for decadal changes of ENSO behavior: Roles of background wind changes

R. H. Weisberg and C. Wang, Slow Variability in the Equatorial West-Central Pacific in Relation to ENSO, Journal of Climate, vol.10, issue.8, pp.8-1997
DOI : 10.1175/1520-0442(1997)010<1998:SVITEW>2.0.CO;2

R. H. Weisberg and C. Wang, A Western Pacific Oscillator Paradigm for the El Ni??o-Southern Oscillation, Geophysical Research Letters, vol.115, issue.7
DOI : 10.1029/97GL00689

R. H. Weisberg and L. Qiao, Equatorial upwelling in the central Pacific estimated from moored velocity profilersÃEÃQu’†ÃPprh‚t…Ã, pp.105-124, 2000.

K. Wyrtki, An Estimate of Equatorial Upwelling in the Pacific, Journal of Physical Oceanography, vol.11, issue.9, pp.1205-1214, 1981.
DOI : 10.1175/1520-0485(1981)011<1205:AEOEUI>2.0.CO;2

K. Wyrtki and B. Kilonsky, Mean Water and Current Structure during the Hawaii-to-Tahiti Shuttle Experiment, Journal of Physical Oceanography, vol.14, issue.2, pp.242-254, 1984.
DOI : 10.1175/1520-0485(1984)014<0242:MWACSD>2.0.CO;2

K. Wyrtki, Water displacements in the Pacific and the genesis of El Nino cycles, Journal of Geophysical Research, vol.72, issue.C4
DOI : 10.1029/JC090iC04p07129

F. L. Yin and E. S. Sarachik, Dynamics and Heat Balance of Steady Equatorial Undercurrents, Journal of Physical Oceanography, vol.23, issue.8, pp.1647-1669, 1993.
DOI : 10.1175/1520-0485(1993)023<1647:DAHBOS>2.0.CO;2

K. Yoshida, A theory of the Cromwell current (the equatorial undercurrent) and of the equatorial upwelling -An interpretation in a similarity to a costal circulation, EÃPprh‚t… T‚pÃEhƒh, vol.15, pp.159-170, 1959.

X. Yu and M. J. Mcphaden, Seasonal Variability in the Equatorial Pacific, Journal of Physical Oceanography, vol.29, issue.5, pp.925-947, 1999.
DOI : 10.1175/1520-0485(1999)029<0925:SVITEP>2.0.CO;2

X. Yu and M. J. Mcphaden, Dynamical Analysis of Seasonal and Interannual Variability in the Equatorial Pacific*, Journal of Physical Oceanography, vol.29, issue.9, pp.2350-2369, 1999.
DOI : 10.1175/1520-0485(1999)029<2350:DAOSAI>2.0.CO;2

S. Zebiak, Oceanic Heat Content Variability and El Ni??o Cycles, Journal of Physical Oceanography, vol.19, issue.4, pp.475-486, 1989.
DOI : 10.1175/1520-0485(1989)019<0475:OHCVAE>2.0.CO;2