North Atlantic Atmosphere–Ocean Interaction on Intraseasonal Time Scales

Laura M. Ciasto Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado

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David W. J. Thompson Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado

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Abstract

The authors examine wintertime atmosphere–ocean interaction on weekly time scales over the North Atlantic sector. Consistent with previous results, it is found that the strongest interactions between the ocean and atmosphere occur when the atmosphere leads. However, the authors also find a spatially coherent and statistically significant pattern of sea surface temperature anomalies over the Gulf Stream extension region that precedes changes in the leading mode of Northern Hemisphere atmospheric variablilty by ∼2 weeks.

Corresponding author address: Laura M. Ciasto, Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523-1371. Email: lciasto@atmos.colostate.edu

Abstract

The authors examine wintertime atmosphere–ocean interaction on weekly time scales over the North Atlantic sector. Consistent with previous results, it is found that the strongest interactions between the ocean and atmosphere occur when the atmosphere leads. However, the authors also find a spatially coherent and statistically significant pattern of sea surface temperature anomalies over the Gulf Stream extension region that precedes changes in the leading mode of Northern Hemisphere atmospheric variablilty by ∼2 weeks.

Corresponding author address: Laura M. Ciasto, Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523-1371. Email: lciasto@atmos.colostate.edu

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  • Bjerknes, J., 1964: Atlantic air-sea interaction. Advances in Geophysics, Vol. 10, Academic Press, 1–82.

  • Bretherton, C. S., and D. Battisti, 2000: An interpretation of the results from atmospheric general circulation models forced by the history of observed sea surface temperature distribution. Geophys. Res. Lett., 27 , 767770.

    • 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 , 19902009.

    • Search Google Scholar
    • Export Citation
  • Cayan, D. R., 1992: Latent and sensible heat flux anomalies over the northern oceans: Driving the sea surface temperature. J. Phys. Oceanogr., 22 , 859881.

    • Search Google Scholar
    • Export Citation
  • Czaja, A., and C. Frankignoul, 1999: Influence of the North Atlantic SST on the atmospheric circulation. Geophys. Res. Lett., 26 , 29692972.

    • 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 , 393408.

    • Search Google Scholar
    • Export Citation
  • Deser, C., M. A. Alexander, and M. S. Timlin, 2003: Understanding the persistence of sea surface temperature anomalies in midlatitudes. J. Climate, 16 , 5772.

    • Search Google Scholar
    • Export Citation
  • Ferranti, L., F. Molteni, and T. N. Palmer, 1994: Impact of localized tropical and extratropical SST anomalies in ensembles of seasonal GCM integrations. Quart. J. Roy. Meteor. Soc., 120 , 16131645.

    • Search Google Scholar
    • Export Citation
  • Frankignoul, C., and K. Hasselman, 1977: Stochastic climate models. Part II: Application to sea-surface temperature variability and thermocline variability. Tellus, 29 , 289305.

    • Search Google Scholar
    • Export Citation
  • Kalnay, E., and Coauthors, 1996: The NCEP/NCAR 40-Year Reanalysis Project. Bull. Amer. Meteor. Soc., 77 , 437471.

  • Kushnir, Y., W. A. Robinson, I. Blade, N. M. J. Hall, S. Peng, and R. Sutton, 2002: Atmospheric GCM response to extratropical SST anomalies: Synthesis and evaluation. J. Climate, 15 , 22332256.

    • Search Google Scholar
    • Export Citation
  • Mehta, V. M., M. J. Suarez, J. Manganello, and T. L. Delworth, 2000: Predictability of multiyear to decadal variations in the North Atlantic Oscillation and associated Northern Hemisphere climate variations: 1959–1993. Geophys. Res. Lett., 27 , 121124.

    • Search Google Scholar
    • Export Citation
  • Nonaka, M., and S. P. Xie, 2003: Covariations of sea surface temperature and wind over the Kuroshio and its extension: Evidence for ocean–atmosphere feedback. J. Climate, 16 , 14041413.

    • Search Google Scholar
    • Export Citation
  • O'Neill, L. W., D. B. Chelton, and S. K. Esbensen, 2003: Observations of SST-induced perturbations of the wind stress field over the Southern Ocean on seasonal timescales. J. Climate, 16 , 23402354.

    • Search Google Scholar
    • Export Citation
  • Palmer, T. N., and Z. Sun, 1985: A modelling and observational study of the relationship between sea surface temperatures in the north-west Atlantic and the atmospheric general circulation. Quart. J. Roy. Meteor. Soc., 111 , 947975.

    • Search Google Scholar
    • Export Citation
  • Peng, S., A. Mysak, H. Ritchie, J. Derome, and B. Dugas, 1995: The difference between early and middle winter atmospheric response to sea surface temperature anomalies in the northwest Atlantic. J. Climate, 8 , 137157.

    • Search Google Scholar
    • Export Citation
  • Reynolds, R. W., N. A. Rayner, T. M. Smith, D. C. Stokes, and W. Wang, 2002: An improved in situ and satellite SST analysis for climate. J. Climate, 15 , 16091625.

    • Search Google Scholar
    • Export Citation
  • Rodwell, M. J., D. P. Rowell, and C. K. Folland, 1999: Ocean forcing of the wintertime North Atlantic oscillation and European climate. Nature, 398 , 320323.

    • Search Google Scholar
    • Export Citation
  • Thompson, D. W. J., and J. M. Wallace, 2001: Regional impacts of the Northern Hemisphere Annular Mode. Science, 293 , 8589.

  • Wallace, J. M., C. Smith, and Q. Jiang, 1990: Spatial patterns of atmosphere–ocean interaction in the northern winter. J. Climate, 3 , 990998.

    • Search Google Scholar
    • Export Citation
  • Visbeck, M., E. P. Chassignet, R. G. Curry, T. L. Delworth, R. R. Dickson, and G. Krahmann, 2003: The ocean's response to North Atlantic Oscillation variability. The North Atlantic Oscillation: Climate Significance and Environmental Impact, J. W. Hurrell et al., Eds., Amer. Geophys. Union, 113–146.

    • Search Google Scholar
    • Export Citation
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