Editorial Type:
Article
Article Type:
Research Article

Tropical Atmospheric Forcing of the Wintertime North Atlantic Oscillation

Bin Yu Climate Research Division, Environment and Climate Change Canada, Toronto, Ontario, Canada

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Hai Lin Atmospheric Numerical Weather Prediction Research, Environment and Climate Change Canada, Dorval, Quebec, Canada

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Print Publication:
01 Mar 2016
DOI:
https://doi.org/10.1175/JCLI-D-15-0583.1
Page(s):
1755–1772
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Abstract

The relationship between the interannual wintertime variability of the North Atlantic Oscillation (NAO) and tropical heating anomalies is examined using the NCEP–NCAR reanalysis and observation-based sea surface temperature (SST) and precipitation data for the period from 1980 to 2011. The NAO is found to be significantly correlated with the precipitation anomalies in the tropical Indian Ocean and tropical American–Atlantic region, but not with the underlying SST anomalies. The tropical heating impact on the NAO is examined and the evolution process of the influence is explored by numerical experiments using a primitive equation atmospheric model forced by atmospheric heating perturbations. Results from the reanalysis data and numerical experiments suggest that the atmospheric heating in the tropical Indian Ocean appears to be a driving force for the NAO variability. The atmospheric response to the tropical heating involves the combined effects of Rossby wave dispersion, normal mode instability, and transient eddy feedback. The remote forcing influence on the NAO tends to be organized and achieved by the circumglobal teleconnection pattern. By contrast, the influence of the tropical American–Atlantic heating on the NAO is weak. The linkage between the NAO and the tropical American–Atlantic heating is likely through the anomalously meridional atmospheric circulation over the Atlantic Ocean.

Denotes Open Access content.

Corresponding author address: Dr. Bin Yu, Climate Research Division, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada. E-mail: bin.yu@canada.ca

Abstract

The relationship between the interannual wintertime variability of the North Atlantic Oscillation (NAO) and tropical heating anomalies is examined using the NCEP–NCAR reanalysis and observation-based sea surface temperature (SST) and precipitation data for the period from 1980 to 2011. The NAO is found to be significantly correlated with the precipitation anomalies in the tropical Indian Ocean and tropical American–Atlantic region, but not with the underlying SST anomalies. The tropical heating impact on the NAO is examined and the evolution process of the influence is explored by numerical experiments using a primitive equation atmospheric model forced by atmospheric heating perturbations. Results from the reanalysis data and numerical experiments suggest that the atmospheric heating in the tropical Indian Ocean appears to be a driving force for the NAO variability. The atmospheric response to the tropical heating involves the combined effects of Rossby wave dispersion, normal mode instability, and transient eddy feedback. The remote forcing influence on the NAO tends to be organized and achieved by the circumglobal teleconnection pattern. By contrast, the influence of the tropical American–Atlantic heating on the NAO is weak. The linkage between the NAO and the tropical American–Atlantic heating is likely through the anomalously meridional atmospheric circulation over the Atlantic Ocean.

Denotes Open Access content.

Corresponding author address: Dr. Bin Yu, Climate Research Division, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada. E-mail: bin.yu@canada.ca
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  • Bader, J., and M. Latif, 2003: The impact of decadal-scale Indian Ocean sea surface temperature anomalies on Sahelian rainfall and the North Atlantic Oscillation. Geophys. Res. Lett., 30, 2169, doi:10.1029/2003GL018426.

    • Search Google Scholar
    • Export Citation

  • Bader, J., and M. Latif, 2005: North Atlantic Oscillation response to anomalous Indian Ocean SST in a coupled GCM. J. Climate, 18, 5382–5389, doi:10.1175/JCLI3577.1.

    • Search Google Scholar
    • Export Citation

  • Boer, G. J., 1986: A comparison of mass and energy budgets from two FGGE datasets and a GCM. Mon. Wea. Rev., 114, 885–902, doi:10.1175/1520-0493(1986)114<0885:ACOMAE>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Branstator, G., 1983: Horizontal energy propagation in a barotropic atmosphere with meridional and zonal structure. J. Atmos. Sci., 40, 1689–1708, doi:10.1175/1520-0469(1983)040<1689:HEPIAB>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Branstator, G., 1995: Organization of storm track anomalies by recurring low-frequency circulation anomalies. J. Atmos. Sci., 52, 207–226, doi:10.1175/1520-0469(1995)052<0207:OOSTAB>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Branstator, G., 2002: Circumglobal teleconnections, the jet stream waveguide, and the North Atlantic Oscillation. J. Climate, 15, 1893–1910, doi:10.1175/1520-0442(2002)015<1893:CTTJSW>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Bretherton, C. S., M. Widmann, V. P. Dymnikov, J. M. Wallace, and I. Bladé, 1999: The effective number of spatial degrees of freedom of a time-varying field. J. Climate, 12, 1990–2009, doi:10.1175/1520-0442(1999)012<1990:TENOSD>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Brönnimann, S., 2007: Impact of El Niño–Southern Oscillation on European climate. Rev. Geophys., 45, RG3003, doi:10.1029/2006RG000199.

    • Search Google Scholar
    • Export Citation

  • Chang, E. K. M., 1998: Poleward-propagating angular momentum perturbations induced by zonally symmetric heat sources in the tropics. J. Atmos. Sci., 55, 2229–2248, doi:10.1175/1520-0469(1998)055<2229:PPAMPI>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Copsey, D., R. Sutton, and J. R. Knight, 2006: Recent trends in sea level pressure in the Indian Ocean region. Geophys. Res. Lett., 33, L19712, doi:10.1029/2006GL027175.

    • Search Google Scholar
    • Export Citation

  • Czaja, A., and C. Frankignoul, 2002: Observed impact of Atlantic SST anomalies on the North Atlantic Oscillation. J. Climate, 15, 606–623, doi:10.1175/1520-0442(2002)015<0606:OIOASA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Deser, C., and M. S. Timlin, 1997: Atmosphere–ocean interaction on weekly timescales in the North Atlantic and Pacific. J. Climate, 10, 393–408, doi:10.1175/1520-0442(1997)010<0393:AOIOWT>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Drévillon, M., C. Cassou, and L. Terray, 2003: Model study of the North Atlantic region atmospheric response to autumn tropical Atlantic sea surface temperature anomalies. Quart. J. Roy. Meteor. Soc., 129, 2591–2611, doi:10.1256/qj.02.17.

    • Search Google Scholar
    • Export Citation

  • Fraedrich, K., and K. Müller, 1992: Climate anomalies in Europe associated with ENSO extremes. Int. J. Climatol., 12, 25–31, doi:10.1002/joc.3370120104.

    • Search Google Scholar
    • Export Citation

  • Frankignoul, C., and E. Kestenare, 2005: Observed Atlantic SST anomaly impact on the NAO: An update. J. Climate, 18, 4089–4094, doi:10.1175/JCLI3523.1.

    • Search Google Scholar
    • Export Citation

  • García-Serrano, J., T. Losada, B. Rodríguez-Fonseca, and I. Polo, 2008: Tropical Atlantic variability modes (1979–2002). Part II: Time-evolving atmospheric circulation related to SST-forced tropical convection. J. Climate, 21, 6476–6497, doi:10.1175/2008JCLI2191.1.

    • Search Google Scholar
    • Export Citation

  • García-Serrano, J., T. Losada, and B. Rodríguez-Fonseca, 2011: Extratropical atmospheric response to the Atlantic Niño decaying phase. J. Climate, 24, 1613–1625, doi:10.1175/2010JCLI3640.1.

    • Search Google Scholar
    • Export Citation

  • Gill, A. E., 1980: Some simple solutions for heat-induced tropical circulation. Quart. J. Roy. Meteor. Soc., 106, 447–462, doi:10.1002/qj.49710644905.

    • Search Google Scholar
    • Export Citation

  • Gouirand, I., V. Moron, and E. Zorita, 2007: Teleconnections between ENSO and North Atlantic in an ECHO-G simulation of the 1000–1990 period. Geophys. Res. Lett., 34, L06705, doi:10.1029/2006GL028852.

    • Search Google Scholar
    • Export Citation

  • Greatbatch, R. J., J. Lu, and K. A. Peterson, 2004: Nonstationary impact of ENSO on Euro-Atlantic winter climate. Geophys. Res. Lett., 31, L02208, doi:10.1029/2003GL018542.

    • Search Google Scholar
    • Export Citation

  • Haarsma, R. J., and W. Hazeleger, 2007: Extratropical atmospheric response to equatorial Atlantic cold tongue anomalies. J. Climate, 20, 2076–2091, doi:10.1175/JCLI4130.1.

    • Search Google Scholar
    • Export Citation

  • Hall, N. M. J., 2000: A simple GCM based on dry dynamics and constant forcing. J. Atmos. Sci., 57, 1557–1572, doi:10.1175/1520-0469(2000)057<1557:ASGBOD>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hall, N. M. J., J. Derome, and H. Lin, 2001a: The extratropical signal generated by a midlatitude SST anomaly. Part I: Sensitivity at equilibrium. J. Climate, 14, 2035–2053, doi:10.1175/1520-0442(2001)014<2035:TESGBA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hall, N. M. J., H. Lin, and J. Derome, 2001b: The extratropical signal generated by a midlatitude SST anomaly. Part II: Influence on seasonal forecasts. J. Climate, 14, 2696–2709, doi:10.1175/1520-0442(2001)014<2696:TESGBA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hoerling, M. P., A. Kumar, and M. Zhong, 1997: El Niño, La Niña, and the nonlinearity of their teleconnections. J. Climate, 10, 1769–1786, doi:10.1175/1520-0442(1997)010<1769:ENOLNA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hoerling, M. P., J. W. Hurrell, T. Xu, G. T. Bates, and A. S. Phillips, 2004: Twentieth century North Atlantic climate change. Part II: Understanding the effect of Indian Ocean warming. Climate Dyn., 23, 391–405, doi:10.1007/s00382-004-0433-x.

    • Search Google Scholar
    • Export Citation

  • Hoskins, B. J., and D. J. Karoly, 1981: The steady linear response of a spherical atmosphere to thermal and orographic forcing. J. Atmos. Sci., 38, 1179–1196, doi:10.1175/1520-0469(1981)038<1179:TSLROA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hoskins, B. J., and T. Ambrizzi, 1993: Rossby wave propagation on a realistic longitudinally varying flow. J. Atmos. Sci., 50, 1661–1671, doi:10.1175/1520-0469(1993)050<1661:RWPOAR>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hoskins, B. J., I. N. James, and G. H. White, 1983: The shape, propagation and mean-flow interaction of large-scale weather systems. J. Atmos. Sci., 40, 1595–1612, doi:10.1175/1520-0469(1983)040<1595:TSPAMF>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hoskins, B. J., H.-H. Hsu, I. N. James, M. Masutani, P. D. Sardeshmukh, and G. H. White, 1989: Diagnostics of the global atmospheric circulation based on ECMWF analyses 1979–1989. Tech. Doc. WCRP-27, WMO-TD-326, 217 pp.

  • Hsu, H.-H., and S.-H. Lin, 1992: Global teleconnections in the 250-mb streamfunction field during the Northern Hemisphere winter. Mon. Wea. Rev., 120, 1169–1190, doi:10.1175/1520-0493(1992)120<1169:GTITMS>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Hurrell, J. W., 1995: Decadal trends in the North Atlantic Oscillation: Regional temperatures and precipitation. Science, 269, 676–679, doi:10.1126/science.269.5224.676.

    • Search Google Scholar
    • Export Citation

  • Hurrell, J. W., and H. van Loon, 1997: Decadal variations associated with the North Atlantic Oscillation. Climatic Change, 36, 301–326, doi:10.1023/A:1005314315270.

    • Search Google Scholar
    • Export Citation

  • Hurrell, J. W., Y. Kushnir, M. Visbeck, and G. Ottersen, 2003: An overview of the North Atlantic Oscillation. The North Atlantic Oscillation: Climate Significance and Environmental Impact, Geophys. Monogr., Vol. 134, Amer. Geophys. Union, 1–35.

  • Jia, X., H. Lin, and J. Derome, 2009: The influence of tropical Pacific forcing on the Arctic Oscillation. Climate Dyn., 32, 495–509, doi:10.1007/s00382-008-0401-y.

    • Search Google Scholar
    • Export Citation

  • Jones, P. D., T. Jónsson, and D. Wheeler, 1997: Extension to the North Atlantic Oscillation using early instrumental pressure observations from Gibraltar and south-west Iceland. Int. J. Climatol., 17, 1433–1450, doi:10.1002/(SICI)1097-0088(19971115)17:13<1433::AID-JOC203>3.0.CO;2-P.

    • Search Google Scholar
    • Export Citation

  • Kistler, R., and Coauthors, 2001: The NCEP–NCAR 50-Year Reanalysis: Monthly means CD-ROM and documentation. Bull. Amer. Meteor. Soc., 82, 247–267, doi:10.1175/1520-0477(2001)082<0247:TNNYRM>2.3.CO;2.

    • Search Google Scholar
    • Export Citation

  • Krishnamurti, T. N., 1971: Tropical east–west circulations during the northern summer. J. Atmos. Sci., 28, 1342–1347, doi:10.1175/1520-0469(1971)028<1342:TEWCDT>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Kug, J.-S., and F.-F. Jin, 2009: Left-hand rule for synoptic eddy feedback on low-frequency flow. Geophys. Res. Lett., 36, L05709, doi:10.1029/2008GL036435.

    • Search Google Scholar
    • Export Citation

  • Lau, N.-C., 1988: Variability of the observed midlatitude storm tracks in relation to the low-frequency changes in the circulation pattern. J. Atmos. Sci., 45, 2718–2743, doi:10.1175/1520-0469(1988)045<2718:VOTOMS>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Li, S., M. P. Hoerling, S. Peng, and K. M. Weickmann, 2006: The annular response to tropical Pacific SST forcing. J. Climate, 19, 1802–1819, doi:10.1175/JCLI3668.1.

    • Search Google Scholar
    • Export Citation

  • Li, Y., and N.-C. Lau, 2012: Impact of ENSO on the atmospheric variability over the North Atlantic in late winter—Role of transient eddies. J. Climate, 25, 320–342, doi:10.1175/JCLI-D-11-00037.1.

    • Search Google Scholar
    • Export Citation

  • Limpasuvan, V., and D. L. Hartmann, 2000: Wave-maintained annular modes of climate variability. J. Climate, 13, 4414–4429, doi:10.1175/1520-0442(2000)013<4414:WMAMOC>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Lin, H., 2009: Global extratropical response to diabatic heating variability of the Asian summer monsoon. J. Atmos. Sci., 66, 2697–2713, doi:10.1175/2009JAS3008.1.

    • Search Google Scholar
    • Export Citation

  • Lin, H., J. Derome, and G. Brunet, 2005: Tropical Pacific link to the two dominant patterns of atmospheric variability. Geophys. Res. Lett., 32, L03801, doi:10.1029/2004GL021495.

    • Search Google Scholar
    • Export Citation

  • Lin, H., G. Brunet, and J. Derome, 2007: Intraseasonal variability in a dry atmospheric model. J. Atmos. Sci., 64, 2422–2441, doi:10.1175/JAS3955.1.

    • Search Google Scholar
    • Export Citation

  • Lin, H., G. Brunet, and J. Derome, 2008: Seasonal forecasts of Canadian winter precipitation by post-processing GCM integrations. Mon. Wea. Rev., 136, 769–783, doi:10.1175/2007MWR2232.1.

    • Search Google Scholar
    • Export Citation

  • Lin, H., G. Brunet, and J. Derome, 2009: An observed connection between the North Atlantic Oscillation and the Madden–Julian oscillation. J. Climate, 22, 364–380, doi:10.1175/2008JCLI2515.1.

    • Search Google Scholar
    • Export Citation

  • Lin, H., G. Brunet, and B. Yu, 2015: Interannual variability of the Madden–Julian oscillation and its impact on the North Atlantic Oscillation in the boreal winter. Geophys. Res. Lett., 42, 5571–5576, doi:10.1002/2015GL064547.

    • Search Google Scholar
    • Export Citation

  • Liu, Z., and M. Alexander, 2007: Atmospheric bridge, oceanic tunnel, and global climatic teleconnections. Rev. Geophys., 45, RG2005, doi:10.1029/2005RG000172.

    • Search Google Scholar
    • Export Citation

  • Madden, R. A., and P. R. Julian, 1971: Description of a 40–50 day oscillation in the zonal wind in the tropical Pacific. J. Atmos. Sci., 28, 702–708, doi:10.1175/1520-0469(1971)028<0702:DOADOI>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Mathieu, P. P., R. T. Sutton, B. Dong, and M. Collins, 2004: Predictability of winter climate over the North Atlantic European region during ENSO events. J. Climate, 17, 1953–1974, doi:10.1175/1520-0442(2004)017<1953:POWCOT>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Merkel, U., and M. Latif, 2002: A high resolution AGCM study of the El Niño impact on the North Atlantic/European sector. Geophys. Res. Lett., 29, 1291, doi:10.1029/2001GL013726.

    • Search Google Scholar
    • Export Citation

  • Molteni, F., T. N. Stockdale, and F. Vitart, 2015: Understanding and modelling extratropical teleconnections with the Indo-Pacific region during the northern winter. Climate Dyn., 45, 3119–3140, doi:10.1007/s00382-015-2528-y.

    • Search Google Scholar
    • Export Citation

  • Moron, V., and I. Gouirand, 2003: Seasonal modulation of the El Niño–Southern Oscillation relationship with sea level pressure anomalies over the North Atlantic in October–March 1873–1996. Int. J. Climatol., 23, 143–155, doi:10.1002/joc.868.

    • Search Google Scholar
    • Export Citation

  • Nigam, S., 1994: On the dynamical basis for the Asian summer monsoon rainfall–El Niño relationship. J. Climate, 7, 1750–1771, doi:10.1175/1520-0442(1994)007<1750:OTDBFT>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • North, G. R., T. L. Bell, R. F. Cahalan, and F. J. Moeng, 1982: Sampling errors in the estimation of empirical orthogonal functions. Mon. Wea. Rev., 110, 699–706, doi:10.1175/1520-0493(1982)110<0699:SEITEO>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Peng, S., W. A. Robinson, S. Li, and M. P. Hoerling, 2005: Tropical Atlantic SST forcing of coupled North Atlantic seasonal responses. J. Climate, 18, 480–496, doi:10.1175/JCLI-3270.1.

    • Search Google Scholar
    • Export Citation

  • Rayner, N. A., D. E. Parker, E. B. Horton, C. K. Folland, L. V. Alexander, D. P. Rowell, E. C. Kent, and A. Kaplan, 2003: Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century. J. Geophys. Res., 108, 4407, doi:10.1029/2002JD002670.

    • Search Google Scholar
    • Export Citation

  • Sardeshmukh, P. D., and B. J. Hoskins, 1988: The generation of global rotational flow by steady idealized tropical divergence. J. Atmos. Sci., 45, 1228–1251, doi:10.1175/1520-0469(1988)045<1228:TGOGRF>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Seager, R., N. Harnik, Y. Kushnir, W. Robinson, and J. Miller, 2003: Mechanisms of hemispherically symmetric climate variability. J. Climate, 16, 2960–2978, doi:10.1175/1520-0442(2003)016<2960:MOHSCV>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Simmons, A. J., J. M. Wallace, and G. W. Branstator, 1983: Barotropic wave propagation and instability, and atmospheric teleconnection patterns. J. Atmos. Sci., 40, 1363–1392, doi:10.1175/1520-0469(1983)040<1363:BWPAIA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Tanaka, H. L., N. Ishizaki, and A. Kitoh, 2004: Trend and interannual variability of Walker, monsoon and Hadley circulations defined by velocity potential in the upper troposphere. Tellus, 56, 250–269, doi:10.1111/j.1600-0870.2004.00049.x.

    • Search Google Scholar
    • Export Citation

  • Thompson, D. W. J., and J. M. Wallace, 1998: The Arctic Oscillation signature in wintertime geopotential height and temperature fields. Geophys. Res. Lett., 25, 1297–1300, doi:10.1029/98GL00950.

    • Search Google Scholar
    • Export Citation

  • Ting, M., M. P. Hoerling, T. Xu, and A. Kumar, 1996: Northern Hemisphere teleconnection patterns during extreme phases of the zonal-mean circulation. J. Climate, 9, 2614–2633, doi:10.1175/1520-0442(1996)009<2614:NHTPDE>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Trenberth, K. E., and A. Solomon, 1994: The global heat balance: Heat transports in the atmosphere and ocean. Climate Dyn., 10, 107–134, doi:10.1007/BF00210625.

    • Search Google Scholar
    • Export Citation

  • Trenberth, K. E., G. Branstator, D. Karoly, A. Kumar, N.-C. Lau, and C. Ropelewski, 1998: Progress during TOGA in understanding and modeling global teleconnections associated with tropical sea surface temperatures. J. Geophys. Res., 103, 14 291–14 324, doi:10.1029/97JC01444.

    • Search Google Scholar
    • Export Citation

  • Wallace, J. M., and D. S. Gutzler, 1981: Teleconnections in the geopotential height field during the Northern Hemisphere winter. Mon. Wea. Rev., 109, 784–812, doi:10.1175/1520-0493(1981)109<0784:TITGHF>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Wang, B., Q. Ding, X. Fu, I. S. Kang, K. Jin, J. Shukla, and F. Doblas-Reyes, 2005: Fundamental challenge in simulation and prediction of summer monsoon rainfall. Geophys. Res. Lett., 32, L15711, doi:10.1029/2005GL022734.

    • Search Google Scholar
    • Export Citation

  • Xie, P., and P. A. Arkin, 1997: Global precipitation: A 17-year monthly analysis based on gauge observations, satellite estimates, and numerical model outputs. Bull. Amer. Meteor. Soc., 78, 2539–2558, doi:10.1175/1520-0477(1997)078<2539:GPAYMA>2.0.CO;2.

    • Search Google Scholar
    • Export Citation

  • Yu, B., and H. Lin, 2013: Tropical/extratropical forcing on wintertime variability of the extratropical temperature and circulation. Climate Dyn., 40, 1183–1200, doi:10.1007/s00382-012-1367-3.

    • Search Google Scholar
    • Export Citation

  • Yu, B., A. Shabbar, and F. Zwiers, 2007: The enhanced PNA-like climate response to Pacific interannual and decadal variability. J. Climate, 20, 5285–5300, doi:10.1175/2007JCLI1480.1.

    • Search Google Scholar
    • Export Citation
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