Article Type:
Research Article

Atmospheric Modes of Variability in a Changing Climate

Jenny Brandefelt Department of Meteorology, Stockholm University, Stockholm, Sweden

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Print Publication:
15 Nov 2006
DOI:
https://doi.org/10.1175/JCLI3953.1
Page(s):
5934–5943
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Abstract

The response of the atmospheric circulation to an enhanced radiative greenhouse gas forcing in a transient integration with a coupled global climate model is investigated. The spatial patterns of the leading modes of Northern Hemisphere atmospheric variability are shown to change in response to the enhanced forcing. An earlier study showed that the spatial patterns of the leading modes in the Southern Hemisphere changed in response to the enhanced forcing. These changes were associated with changes in the propagation conditions for barotropic Rossby waves. This is, however, not the case for the Northern Hemisphere, where the propagation conditions are unchanged. Other possible mechanisms for the changes in the spatial patterns of the leading modes are discussed.

Corresponding author address: Jenny Brandefelt, Department of Meteorology, Stockholm University, S-10691 Stockholm, Sweden. Email: jenny@misu.su.se

Abstract

The response of the atmospheric circulation to an enhanced radiative greenhouse gas forcing in a transient integration with a coupled global climate model is investigated. The spatial patterns of the leading modes of Northern Hemisphere atmospheric variability are shown to change in response to the enhanced forcing. An earlier study showed that the spatial patterns of the leading modes in the Southern Hemisphere changed in response to the enhanced forcing. These changes were associated with changes in the propagation conditions for barotropic Rossby waves. This is, however, not the case for the Northern Hemisphere, where the propagation conditions are unchanged. Other possible mechanisms for the changes in the spatial patterns of the leading modes are discussed.

Corresponding author address: Jenny Brandefelt, Department of Meteorology, Stockholm University, S-10691 Stockholm, Sweden. Email: jenny@misu.su.se

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  • AchutaRao, K., C. Covey, C. Doutriaux, M. Fiorion, P. Gleckler, T. Phillips, K. Sperber, and K. Taylor, 2004: An appraisal of coupled climate model simulations. Tech. Rep. UCRL-TR-202550, Lawrence Livermore National Laboratory, Livermore, CA, 183 pp.

  • Brandefelt, J., and E. Källén, 2004: The response of the Southern Hemisphere atmospheric circulation to an enhanced greenhouse gas forcing. J. Climate, 17 , 4425–4442.

    • Search Google Scholar
    • Export Citation

  • Branstator, G., 2002: Circumglobal teleconnections, the jet stream waveguide, and the North Atlantic Oscillation. J. Climate, 15 , 1893–1910.

    • Search Google Scholar
    • Export Citation

  • Broccoli, A. J., N-G. Lau, and M. J. Nath, 1998: The cold ocean–warm land pattern: Model simulation and relevance to climate change detection. J. Climate, 11 , 2743–2763.

    • Search Google Scholar
    • Export Citation

  • Carnell, R. E., and C. A. Senior, 1998: Changes in mid-latitude variability due to increasing greenhouse gases and sulfate aerosols. Climate Dyn., 14 , 369–383.

    • Search Google Scholar
    • Export Citation

  • Hamming, R. W., 1989: Digital Filters. Prentice Hall International, 284 pp.

  • Highwood, E. J., B. J. Hoskins, and P. Berrisford, 2000: Properties of the Arctic tropopause. Quart. J. Roy. Meteor. Soc., 126 , 1515–1532.

    • Search Google Scholar
    • Export Citation

  • Hoinka, K. P., 1998: Statistics of the global tropopause pressure. Mon. Wea. Rev., 126 , 3303–3325.

  • Hoskins, B. J., and T. Ambrizzi, 1993: Rossby wave propagation on a realistic longitudinally varying flow. J. Atmos. Sci., 50 , 1661–1671.

    • Search Google Scholar
    • Export Citation

  • Houghton, J. T., B. A. Callendar, and S. K. Varney, 1992: Climate Change 1992: The Supplementary Report to the IPCC Scientific Assessment. Cambridge University Press, 198 pp.

    • Search Google Scholar
    • Export Citation

  • Houghton, J. T., Y. Ding, D. J. Griggs, M. Noguer, P. J. van Linden, X. Dai, K. Maskell, and C. A. Johnson, 2001: Climate Change 2001: The Scientific Basis. Cambridge University Press, 881 pp.

    • Search Google Scholar
    • Export Citation

  • Hu, Z. Z., L. Bengtsson, E. Roeckner, M. Christoph, A. Bacher, and J. M. Oberhuber, 2001: Impact of global warming on the interannual and interdecadal climate modes in a coupled GCM. Climate Dyn., 17 , 361–374.

    • Search Google Scholar
    • Export Citation

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

    • Search Google Scholar
    • Export Citation

  • Iacobellis, S. F., G. M. McFarquhar, D. L. Mitchell, and R. C. J. Somerville, 2003: The sensitivity of radiative fluxes to parameterized cloud microphysics. J. Climate, 16 , 2979–2996.

    • Search Google Scholar
    • Export Citation

  • Joseph, R., and M. Ting, 2004: The global stationary wave response to climate change in a coupled GCM. J. Climate, 17 , 540–556.

  • Karoly, D. J., 1983: Rossby wave propagation in a barotropic atmosphere. Dyn. Atmos. Oceans, 7 , 111–125.

  • Lau, K. M., P. J. Sheu, and I. S. Kang, 1994: Multiscale low-frequency circulation modes in the global atmosphere. J. Atmos. Sci., 51 , 1169–1193.

    • Search Google Scholar
    • Export Citation

  • Mo, K. C., and M. Ghil, 1987: Statistics and dynamics of persistent anomalies. J. Atmos. Sci., 44 , 877–901.

  • 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.

    • Search Google Scholar
    • Export Citation

  • Palmer, T. N., 1999: A nonlinear dynamical perspective on climate prediction. J. Climate, 12 , 575–591.

  • Räisänen, J., 2003: CO2-induced changes in angular momentum in CMIP2 experiments. J. Climate, 16 , 132–143.

  • Randel, W. J., F. Wu, and D. J. Gaffen, 2000: Interannual variability of the tropical tropopause derived from radiosonde data and NCEP reanalyses. J. Geophys. Res., 105D , 15509–15524.

    • Search Google Scholar
    • Export Citation

  • Roeckner, E., L. Bengtsson, J. Feichter, J. Lilieveld, and H. Rodhe, 1999: Transient climate change simulations with a coupled atmosphere–ocean GCM including the sulfur cycle. J. Climate, 12 , 3004–3032.

    • Search Google Scholar
    • Export Citation

  • Santer, B. D., and Coauthors, 2003: Contributions of anthropogenic and natural forcing to recent tropopause height changes. Science, 301 , 479–483.

    • Search Google Scholar
    • Export Citation

  • Seidel, D. J., R. J. Ross, and J. K. Angell, 2001: Climatological characteristics of the tropical tropopause as revealed by radiosondes. J. Geophys. Res., 106D , 7857–7878.

    • Search Google Scholar
    • Export Citation

  • Selten, F. M., G. W. Branstator, H. A. Dijkstra, and M. Kliphuis, 2004: Tropical origin for recent and future Northern Hemisphere climate change. Geophys. Res. Lett., 31 .L21205, doi:10.1029/2004GL020739.

    • Search Google Scholar
    • Export Citation

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

    • Search Google Scholar
    • Export Citation

  • Ulbrich, U., and M. Christoph, 1999: A shift in the NAO and increasing storm track activity over Europe due to anthropogenic greenhouse gas forcing. Climate Dyn., 15 , 551–559.

    • 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.

    • Search Google Scholar
    • Export Citation

  • Wallace, J. M., Y. Zhang, and L. Bajuk, 1996: Interpretation of interdecadal trends in Northern Hemisphere surface air temperature. J. Climate, 9 , 249–259.

    • Search Google Scholar
    • Export Citation

  • Williams, K. D., C. A. Senior, and J. F. B. Mitchell, 2001: Transient climate change in the Hadley Centre models: The role of physical processes. J. Climate, 14 , 2659–2674.

    • Search Google Scholar
    • Export Citation
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