Letter | Published:

Arctic amplification decreases temperature variance in northern mid- to high-latitudes

Nature Climate Change volume 4, pages 577582 (2014) | Download Citation

Abstract

Changes in climate variability are arguably more important for society and ecosystems than changes in mean climate, especially if they translate into altered extremes1,2,3. There is a common perception and growing concern that human-induced climate change will lead to more volatile and extreme weather4. Certain types of extreme weather have increased in frequency and/or severity5,6,7, in part because of a shift in mean climate but also because of changing variability1,2,3,8,9,10. In spite of mean climate warming, an ostensibly large number of high-impact cold extremes have occurred in the Northern Hemisphere mid-latitudes over the past decade11. One explanation is that Arctic amplification—the greater warming of the Arctic compared with lower latitudes12 associated with diminishing sea ice and snow cover—is altering the polar jet stream and increasing temperature variability13,14,15,16. This study shows, however, that subseasonal cold-season temperature variability has significantly decreased over the mid- to high-latitude Northern Hemisphere in recent decades. This is partly because northerly winds and associated cold days are warming more rapidly than southerly winds and warm days, and so Arctic amplification acts to reduce subseasonal temperature variance. Previous hypotheses linking Arctic amplification to increased weather extremes invoke dynamical changes in atmospheric circulation11,13,14,15,16, which are hard to detect in present observations17,18 and highly uncertain in the future19,20. In contrast, decreases in subseasonal cold-season temperature variability, in accordance with the mechanism proposed here, are detectable in the observational record and are highly robust in twenty-first-century climate model simulations.

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References

  1. 1.

    Field, C. B. et al. (eds) Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation (Cambridge Univ. Press, 2012).

  2. 2.

    & Extreme events in a changing climate: Variability is more important than averages. Climatic Change 21, 289–302 (1992).

  3. 3.

    et al. The role of increasing temperature variability in European summer heatwaves. Nature 427, 332–336 (2004).

  4. 4.

    , , , & Extreme Weather and Climate Change in the American Mind (Yale Univ. & George Mason Univ., 2012).

  5. 5.

    et al. Global observed changes in daily climate extremes of temperature and precipitation. J. Geophys. Res. 111, D05109 (2006).

  6. 6.

    et al. Updated analyses of temperature and precipitation extreme indices since the beginning of the twentieth century: The HadEX2 dataset. J. Geophys. Res. 118, 2098–2118 (2013).

  7. 7.

    & Increase of extreme events in a warming world. Proc. Natl Acad. Sci. USA 108, 17905–17909 (2011).

  8. 8.

    , , , & No increase in global temperature variability despite changing regional patterns. Nature 500, 327–330 (2013).

  9. 9.

    , & Perception of climate change. Proc. Natl Acad. Sci. USA 109, 14726–14727 (2012).

  10. 10.

    & The shifting probability distribution of global daytime and night-time temperatures. Geophys. Res. Lett. 39, L14707 (2012).

  11. 11.

    , , , & Arctic warming, increasing snow cover and widespread boreal winter cooling. Environ. Res. Lett. 7, 014007 (2012).

  12. 12.

    & The central role of diminishing sea ice in recent Arctic temperature amplification. Nature 464, 1334–1337 (2010).

  13. 13.

    & Evidence linking Arctic amplification to extreme weather in mid-latitudes. Geophys. Res. Lett. 39, L06801 (2012).

  14. 14.

    , , , & Impact of declining Arctic sea ice on winter snowfall. Proc. Natl Acad. Sci. USA 109, 4074–4079 (2012).

  15. 15.

    , , & Cold winter extremes in northern continents linked to Arctic sea ice loss. Environ. Res. Lett. 8, 014036 (2013).

  16. 16.

    , & Warm Arctic-cold continents: Impacts of the newly open Arctic Sea. Polar Res. 30, 15787 (2011).

  17. 17.

    & Exploring links between Arctic amplification and mid-latitude weather. Geophys. Res. Lett. 40, 959–964 (2013).

  18. 18.

    Revisiting the evidence linking Arctic amplification to extreme weather in midlatitudes. Geophys. Res. Lett. 40, 4728–4733 (2013).

  19. 19.

    & Response of the midlatitude jets, and of their variability, to increased greenhouse gases in the CMIP5 models. J. Clim. 26, 7177–7135 (2013).

  20. 20.

    & Opposite CMIP3/CMIP5 trends in the wintertime Northern Annular Mode explained by combined local sea ice and remote tropical influences. Geophys. Res. Lett. 40, 3682–3687 (2013).

  21. 21.

    & Polar amplification of climate change in coupled models. Clim. Dynam. 21, 221–232 (2003).

  22. 22.

    , , & Changes in temperature and precipitation extremes in the IPCC ensemble of global coupled model simulations. J. Clim. 20, 1419–1444 (2007).

  23. 23.

    & Twenty-first century changes in daily temperature variability in CMIP3 climate models. Int. J. Climatol. 34, 1414–1428 (2014).

  24. 24.

    , , & Changes in temperature and precipitation extremes in the CMIP5 ensemble. Climatic Change 119, 345–357 (2013).

  25. 25.

    et al. Modelling daily temperature extremes: Recent climate and future changes over Europe. Climatic Change 81, 249–265 (2007).

  26. 26.

    , & Quantifying uncertainties in projections of extremes—a perturbed land surface parameter experiment. Clim. Dynam. 37, 1381–1398 (2011).

  27. 27.

    & Simulation of daily variability of surface temperature and precipitation over Europe in the current and 2 × CO2 climates using the UKMO climate model. Q. J. R. Meteorol. Soc. 121, 1451–1476 (1995).

  28. 28.

    , & Western European cold spells in current and future climate. Geophys. Res. Lett. 39, L04706 (2012).

  29. 29.

    , & Changes in European summer temperature variability revisited. Geophys. Res. Lett. 39, L19702 (2012).

  30. 30.

    , & Circulation and surface controls on the lower tropospheric air temperature field of the Arctic. J. Geophys. Res. 116, D07104 (2011).

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Acknowledgements

The ERA-Interim reanalysis was produced and provided by the European Centre for Medium-range Weather Forecasts; and the HadGHCND data set by the UK Met Office Hadley Centre. The author acknowledges the World Climate Research Programme, which is responsible for the CMIP5 multi-model ensemble, and the modelling groups for producing and making available their model output. C. Huntingford is thanked for commenting on an earlier version of the manuscript; and C. Deser and L. Sun for useful discussions. This research was financially supported by the UK Natural Environment Research Council grant NE/J019585/1.

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  1. College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, UK

    • James A. Screen

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The author declares no competing financial interests.

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Correspondence to James A. Screen.

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DOI

https://doi.org/10.1038/nclimate2268