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Vertical structure of recent Arctic warming

Abstract

Near-surface warming in the Arctic has been almost twice as large as the global average over recent decades1,2,3,4,5—a phenomenon that is known as the ‘Arctic amplification’. The underlying causes of this temperature amplification remain uncertain. The reduction in snow and ice cover that has occurred over recent decades6,7 may have played a role5,8. Climate model experiments indicate that when global temperature rises, Arctic snow and ice cover retreats, causing excessive polar warming9,10,11. Reduction of the snow and ice cover causes albedo changes, and increased refreezing of sea ice during the cold season and decreases in sea-ice thickness both increase heat flux from the ocean to the atmosphere. Changes in oceanic and atmospheric circulation, as well as cloud cover, have also been proposed to cause Arctic temperature amplification12,13,14,15,16,17. Here we examine the vertical structure of temperature change in the Arctic during the late twentieth century using reanalysis data. We find evidence for temperature amplification well above the surface. Snow and ice feedbacks cannot be the main cause of the warming aloft during the greater part of the year, because these feedbacks are expected to primarily affect temperatures in the lowermost part of the atmosphere, resulting in a pattern of warming that we only observe in spring. A significant proportion of the observed temperature amplification must therefore be explained by mechanisms that induce warming above the lowermost part of the atmosphere. We regress the Arctic temperature field on the atmospheric energy transport into the Arctic and find that, in the summer half-year, a significant proportion of the vertical structure of warming can be explained by changes in this variable. We conclude that changes in atmospheric heat transport may be an important cause of the recent Arctic temperature amplification.

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Figure 1: Averaged temperature trends around latitude circles for 1979–2001 plotted versus latitude and height for the four seasons.
Figure 2: Dark-month (November–February) anomalies of mean temperature relative to the 1850–1900 average as function of year.
Figure 3: Regressions of the 500 hPa temperature field on the atmospheric northward energy transport (ANET) across 60° N.
Figure 4: Averaged temperature trends around latitude circles for 1979–2001 plotted versus latitude and height for April–October.

References

  1. Simon, C., Arris, L. & Heal, B. Arctic Climate Impact Assessment (Cambridge Univ. Press, New York, 2005)

    Google Scholar 

  2. Johannessen, O. M. et al. Arctic climate change: observed and modeled temperature and sea-ice variability. Tellus A 56, 328–341 (2004)

    ADS  Article  Google Scholar 

  3. Polyakov, I. V. et al. Observationally based assessment of polar amplification of global warming. Geophys. Res. Lett. 29 doi: 1029/2001GL011111 (2002)

  4. Rigor, I. G., Colony, R. L. & Martin, S. Variations in surface air temperature observations in the Arctic, 1979–97. J. Clim. 13, 896–914 (2000)

    ADS  Article  Google Scholar 

  5. Serreze, M. C. & Francis, J. A. The Arctic amplification debate. Clim. Change 76, 241–264 (2006)

    ADS  CAS  Article  Google Scholar 

  6. Cavalieri, D. J., Gloersen, P., Parkinson, C. L., Comiso, J. C. & Zwally, H. J. Observed hemispheric asymmetry in global sea ice changes. Science 278, 1104–1106 (1997)

    ADS  CAS  Article  Google Scholar 

  7. Stroeve, J. C. et al. Tracking the Arctic’s shrinking ice cover: Another extreme September minimum in 2004. Geophys. Res. Lett. 32 doi: 10.1029/2004GL021810 (2005)

  8. Solomon, S. et al. (eds) Climate Change 2007: The Physical Science Basis (Cambridge Univ. Press, Cambridge, UK, 2007)

    Google Scholar 

  9. Holland, M. M. & Bitz, C. M. Polar amplification of climate in coupled models. Clim. Dyn. 21, 221–232 (2003)

    Article  Google Scholar 

  10. Hansen, J. et al. Efficacy of climate forcing. J. Geophys. Res. 110 doi: 10.1029/2005JD005776 (2005)

  11. Chapman, W. L. & Walsh, J. E. Simulation of Arctic temperature and pressure by global coupled models. J. Clim. 20, 609–632 (2007)

    ADS  Article  Google Scholar 

  12. Alexeev, V. A., Langen, P. L. & Bates, J. R. Polar amplification of surface warming on an aquaplanet in “ghost forcing” experiments without sea ice feedbacks. Clim. Dyn. 24, 655–666 (2005)

    Article  Google Scholar 

  13. Thompson, D. W. J. & Wallace, J. M. Regional climate impacts of the Northern Hemisphere annular mode and associated climate trends. Science 293, 85–89 (2001)

    ADS  CAS  Article  Google Scholar 

  14. Moritz, R. E., Bitz, C. M. & Steig, E. J. Dynamics of recent climate change in the Arctic. Science 297, 1497–1502 (2002)

    ADS  CAS  Article  Google Scholar 

  15. Wu, Q. & Straus, D. M. AO, COWL, and observed climate trends. J. Clim. 17, 2139–2156 (2004)

    ADS  Article  Google Scholar 

  16. Quadrelli, R. & Wallace, J. M. A simplified linear framework for interpreting patterns of Northern Hemisphere wintertime climate variability. J. Clim. 17, 3728–3744 (2004)

    ADS  Article  Google Scholar 

  17. Wang, X. & Key, J. R. Arctic surface, cloud, and radiation properties on the AVHRR polar pathfinder dataset. Part II: Recent trends. J. Clim. 18, 2575–2593 (2005)

    ADS  Article  Google Scholar 

  18. Manabe, S. & Weatherald, R. T. The effect of doubling the CO2 concentrations on the climate of a general circulation model. J. Atmos. Res. 32, 3–15 (1975)

    ADS  CAS  Article  Google Scholar 

  19. Hansen, J. et al. Dangerous human-made interference with climate: a GISS modelE study. Atmos. Chem. Phys. 7, 2287–2312 (2007)

    ADS  CAS  Article  Google Scholar 

  20. Graversen, R. G. Do changes in the midlatitude circulation have any impact on the Arctic surface air temperature trend? J. Clim. 19, 5422–5438 (2006)

    ADS  Article  Google Scholar 

  21. Thompson, D. W. J. & Wallace, J. M. The Arctic Oscillation signature in the wintertime geopotential height and temperature fields. Geophys. Res. Lett. 9, 1297–1300 (1998)

    ADS  Article  Google Scholar 

  22. Intrieri, J. M. et al. An annual cycle of Arctic surface cloud forcing at SHEBA. J. Geophys. Res. 107 doi: 10.1029/2000JC000439 (2002)

  23. Uppala, S. M. et al. The ERA-40 re-analysis. Q. J. R. Meteorol. Soc. 131, 2961–3012 (2005)

    ADS  Article  Google Scholar 

  24. Jones, P. D., New, M., Parker, D. E., Martin, S. & Rigor, I. G. Surface air temperature and its variations over the last 150 years. Rev. Geophys. 37, 173–199 (1999)

    ADS  Article  Google Scholar 

  25. Oort, A. H. & Peixóto, J. P. Global angular momentum and energy balance requirements from observations. Adv. Geophys. 25, 355–490 (1983)

    ADS  Article  Google Scholar 

  26. Trenberth, K. E. Climate diagnostics from global analysis: Conservation of mass in ECMWF analysis. J. Clim. 4, 707–721 (1991)

    ADS  Article  Google Scholar 

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Acknowledgements

We thank P. Lundberg for comments on the manuscript. The ERA-40 data were obtained from the European Centre for Medium-Range Weather Forecasts (ECMWF) data server, whereas the Climate Research Unit (CRU) at the University of East Anglia provided the observational data used for Fig. 2.

Author Contributions The analysis was performed and the manuscript written by R.G.G., and to some extent T.M. The original idea to use ERA-40 data to study Arctic warming was due to R.G.G., M.T. and E.K. All authors contributed with ideas, discussions and text.

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Correspondence to Rune G. Graversen.

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Graversen, R., Mauritsen, T., Tjernström, M. et al. Vertical structure of recent Arctic warming. Nature 451, 53–56 (2008). https://doi.org/10.1038/nature06502

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