The Arctic region is warming considerably faster than the rest of the globe1, with important consequences for the ecosystems2 and human exploration of the region3. However, the reasons behind this Arctic amplification are not entirely clear4. As a result of measures to enhance air quality, anthropogenic emissions of particulate matter and its precursors have drastically decreased in parts of the Northern Hemisphere over the past three decades5. Here we present simulations with an Earth system model with comprehensive aerosol physics and chemistry that show that the sulfate aerosol reductions in Europe since 1980 can potentially explain a significant fraction of Arctic warming over that period. Specifically, the Arctic region receives an additional 0.3 W m−2 of energy, and warms by 0.5 °C on annual average in simulations with declining European sulfur emissions in line with historical observations, compared with a model simulation with fixed European emissions at 1980 levels. Arctic warming is amplified mainly in fall and winter, but the warming is initiated in summer by an increase in incoming solar radiation as well as an enhanced poleward oceanic and atmospheric heat transport. The simulated summertime energy surplus reduces sea-ice cover, which leads to a transfer of heat from the Arctic Ocean to the atmosphere. We conclude that air quality regulations in the Northern Hemisphere, the ocean and atmospheric circulation, and Arctic climate are inherently linked.
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Bindoff, N. L. et al. in Climate Change 2013: The Physical Science Basis (eds Stocker, T. F. et al.) 867–952 (Cambridge Univ. Press, 2013).
Hinzman, L. D. et al. Trajectory of the Arctic as an integrated system. Ecol. Appl. 23, 1837–1868 (2013).
Peters, G. P. et al. Future emissions from shipping and petroleum activities in the Arctic. Atmos. Chem. Phys. 11, 5305–5320 (2011).
Serreze, M. C. & Barry, R. G. Processes and impacts of Arctic amplification: a research synthesis. Glob. Planet. Change 77, 85–96 (2011).
Chin, M. et al. Multi-decadal aerosol variations from 1980 to 2009: a perspective from observations and a global model. Atmos. Chem. Phys. 14, 3657–3690 (2014).
Myhre, G. et al. in Climate Change 2013: The Physical Science Basis (eds Stocker, T. F. et al.) 658–740 (Cambridge Univ. Press, 2013).
Twomey, S. The influence of pollution on the shortwave albedo of clouds. J. Atmos. Sci. 34, 1149–1152 (1977).
Albrecht, B. A. Aerosols, cloud microphysics, and fractional cloudiness. Science 245, 1227–1230 (1989).
Cohen, J. et al. Recent Arctic amplification and extreme mid-latitude weather. Nature Geosci. 7, 627–637 (2014).
Brigham-Grette, J. et al. Pliocene warmth, polar amplification, and stepped Pleistocene cooling recorded in NE Russia. Science 340, 1421–1427 (2013).
Haywood, A. M. et al. Large-scale features of Pliocene climate: results from the Pliocene model intercomparison project. Clim. Past 9, 191–209 (2013).
Holland, M. M. & Bitz, C. M. Polar amplification of climate change in coupled models. Clim. Dynam. 21, 221–232 (2003).
Curry, J. A., Schramm, J. L. & Ebert, E. E. On the sea ice albedo climate feedback mechanism. J. Clim. 8, 240–247 (1995).
Pithan, F. & Mauritsen, T. Arctic amplification dominated by temperature feedbacks in contemporary climate models. Nature Geosci. 7, 181–184 (2014).
Ogi, M. & Wallace, J. M. The role of summer surface wind anomalies in the summer Arctic sea ice extent in 2010 and 2011. Geophys. Res. Lett. 39, L09704 (2012).
Kapsch, M.-L. et al. Springtime atmospheric energy transport and the control of Arctic summer sea-ice extent. Nature Clim. Change 3, 744–748 (2013).
Polyakov, I. V. et al. Arctic Ocean warming contributes to reduced polar ice cap. J. Phys. Oceanogr. 40, 2743–2756 (2010).
Boer, G. J. & Yu, B. Dynamical aspects of climate sensitivity. Geophys. Res. Lett. 30, 1135 (2003).
Xie, S.-P., Lu, B. & Xiang, B. Similar spatial patterns of climate responses to aerosol and greenhouse gas changes. Nature Geosci. 6, 828–832 (2013).
Iversen, T. et al. The Norwegian Earth System Model, NorESM1-M – Part 2: climate response and scenario projections. Geosci. Model Dev. 6, 389–415 (2013).
Shindell, D. & Faluvegi, G. Climate response to regional radiative forcing during the twentieth century. Nature Geosci. 2, 294–300 (2009).
Asmi, A. et al. Number size distributions and seasonality of submicron particles in Europe 2008–2009. Atmos. Chem. Phys. 11, 5505–5538 (2011).
Makkonen, R., Seland, Ø., Kirkevåg, A., Iversen, T. & Kristjánsson, J. E. Evaluation of aerosol number concentrations in NorESM with improved nucleation parameterization. Atmos. Chem. Phys. 14, 5127–5152 (2014).
Turnock, S. T. et al. Modelled and observed changes in aerosols and surface solar radiation over Europe between 1960 and 2009. Atmos. Chem. Phys. 15, 9477–9500 (2015).
Nafaji, R. M. et al. Attribution of Arctic temperature change to greenhouse-gas and aerosol influences. Nature Clim. Change 5, 246–249 (2015).
Lewinschal, A., Ekman, A. M. L. & Körnich, H. The role of precipitation in aerosol-induced changes in Northern Hemisphere wintertime stationary waves. Clim. Dynam. 41, 647–661 (2013).
Yang, Q. Bitz, C. M. & Doherty, S. J . Offsetting effects of aerosols on Arctic and global climate in the late 20th century. Atmos. Chem. Phys. 14, 3969–3975 (2014).
Lamarque, J.-F. et al. Historical (1850–2000) gridded anthropogenic and biomass burning emissions of reactive gases and aerosols: methodology and application. Atmos. Chem. Phys. 10, 7017–7039 (2010).
Cofala, J. et al. Emissions of Air Pollutants for the World Energy Outlook 2012 Energy Scenarios (International Institute for Applied System Analysis, 2012).
Morice, C. P. et al. Quantifying uncertainties in global and regional temperature change using an ensemble of observational estimates: The HadCRUT4 data set. J. Geophys. Res. 117, D08101 (2012).
Hansen, J. et al. Global surface temperature change. Rev. Geophys. 48, RG4004 (2010).
Vose, R. S. et al. NOAA’s merged land-ocean surface temperature analysis. Bull. Am. Meteorol. Soc. 93, 1677–1685 (2012).
A. Asmi is acknowledged for help with the observational data. This work benefited from discussions with R. G. Graversen, A. Lewinschal, G. Messori, M. Salter, J. Nilsson and F. Pausata. The research leading to these results has received funding from the Nordic Centres of Excellence CRAICC and eSTICC, Swedish Environmental Protection Agency projects SCAC and CLEO, Norwegian Research Council projects EVA (grant no. 229771) and NOTUR (nn2345k), European FP7 Integrated projects PEGASOS (no. 265148) and ACCESS, and European Research Council Grant ATMOGAIN (no. 278277). The Swedish National Supercomputing Centre and NordStore (project ns2345k) are acknowledged for computational resources for running the simulations.
The authors declare no competing financial interests.
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Acosta Navarro, J., Varma, V., Riipinen, I. et al. Amplification of Arctic warming by past air pollution reductions in Europe. Nature Geosci 9, 277–281 (2016). https://doi.org/10.1038/ngeo2673
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