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A climatologically significant aerosol longwave indirect effect in the Arctic

Abstract

The warming of Arctic climate and decreases in sea ice thickness and extent1,2 observed over recent decades are believed to result from increased direct greenhouse gas forcing, changes in atmospheric dynamics having anthropogenic origin3,4,5, and important positive reinforcements including ice–albedo and cloud–radiation feedbacks6. The importance of cloud–radiation interactions is being investigated through advanced instrumentation deployed in the high Arctic since 1997 (refs 7, 8). These studies have established that clouds, via the dominance of longwave radiation, exert a net warming on the Arctic climate system throughout most of the year, except briefly during the summer9. The Arctic region also experiences significant periodic influxes of anthropogenic aerosols, which originate from the industrial regions in lower latitudes10. Here we use multisensor radiometric data7,8 to show that enhanced aerosol concentrations alter the microphysical properties of Arctic clouds, in a process known as the ‘first indirect’ effect11,12. Under frequently occurring cloud types we find that this leads to an increase of an average 3.4 watts per square metre in the surface longwave fluxes. This is comparable to a warming effect from established greenhouse gases and implies that the observed longwave enhancement is climatologically significant.

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Figure 1: Demonstration of how surface longwave flux under cloud depends on cloud liquid water path and effective radius.
Figure 2: Examples of AERI measurements.
Figure 3: Demonstration of the aerosol longwave indirect effect from ARM NSA data.

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References

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

    Article  ADS  CAS  Google Scholar 

  2. 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)

    Article  ADS  CAS  Google Scholar 

  3. Thompson, D. W. J. & Wallace, J. M. Annular modes in the extratropical circulation. Part I: month-to-month variability. J. Clim. 13, 1000–1016 (2001)

    Article  ADS  Google Scholar 

  4. Rigor, I. G., Wallace, J. W. & Colony, R. L. Response of sea ice to the Arctic Oscillation. J. Clim. 15, 2648–2663 (2002)

    Article  ADS  Google Scholar 

  5. Johanessen, O. M. et al. Arctic climate change: observed and modelled temperature and sea ice variability. Tellus A 56, 328–341 (2004)

    Article  ADS  Google Scholar 

  6. Curry, J. A. & Webster, P. J. Thermodynamics of Atmospheres and Oceans (Academic, San Diego, 1999)

    Google Scholar 

  7. Stamnes, K., Ellingson, R. G., Curry, J. A., Walsh, J. E. & Zak, B. D. Review of science issues, deployment strategy, and status for the ARM North Slope of Alaska–Adjacent Arctic Ocean climate research site. J. Clim. 12, 46–63 (1999)

    Article  ADS  Google Scholar 

  8. Uttal, T. et al. Surface heat budget of the Arctic Ocean. Bull. Am. Meteorol. Soc. 83, 255–275 (2002)

    Article  ADS  Google Scholar 

  9. Intrieri, J. M., Shupe, M. D., Uttal, T. & McCarty, B. J. An annual cycle of Arctic cloud characteristics observed by radar and lidar at SHEBA. J. Geophys. Res. 107, doi:10.1029/2000JC000423 (2002)

  10. Barrie, L. A. Arctic air pollution: an overview of current knowledge. Atmos. Environ. 20, 643–663 (1986)

    Article  ADS  CAS  Google Scholar 

  11. Twomey, S. The influence of pollution on the shortwave albedo of clouds. J. Atmos. Sci. 34, 1149–1152 (1977)

    Article  ADS  Google Scholar 

  12. Garrett, T., Radke, L. F. & Hobbs, P. V. Aerosol effects on cloud emissivity and surface longwave heating in the Arctic. J. Atmos. Sci. 59, 769–778 (2002)

    Article  ADS  Google Scholar 

  13. Knuteson, R. O. et al. Atmospheric Emitted Radiance Interferometer. Part II: instrument performance. J. Ocean. Atmos. Technol. 21, 1777–1789 (2004)

    Article  ADS  Google Scholar 

  14. Clothiaux, E. E. et al. Objective determination of cloud heights and radar reflectivities using a combination of active remote sensors at the ARM CART sites. J. Appl. Meteorol. 39, 645–665 (2000)

    Article  ADS  Google Scholar 

  15. Payne, R. E. & Anderson, S. P. A new look at calibration and use of Eppley Precision Infrared Radiometer, Part II: calibration and use of the Woods Hole Oceanographic Institution improved meteorology precision infrared radiometer. J. Ocean. Atmos. Technol 16, 739–751 (1999)

    Article  ADS  Google Scholar 

  16. Delene, D. J. & Ogren, J. A. Variability of aerosol optical properties at four North American surface monitoring sites. J. Atmos. Sci. 59, 1135–1150 (2002)

    Article  ADS  Google Scholar 

  17. Garrett, T. J., Zhao, C., Dong, X., Mace, G. G. & Hobbs, P. V. Effects of varying aerosol regimes on low-level Arctic stratus. Geophys. Res. Lett. 31, doi:10.1029/2004GL019928 (2004)

  18. Turner, D. D. Arctic mixed-phase cloud properties from AERI lidar observations: Algorithm and results from SEHBA. J. Appl. Meteorol. 44, 427–444 (2005)

    Article  ADS  Google Scholar 

  19. Lubin, D. Thermodynamic phase of maritime Antarctic clouds from FTIR and supplementary radiometric data. J. Geophys. Res. 109, doi:10.1029/2003JD003979 (2004)

  20. Mahesh, A., Walden, V. P. & Warren, S. G. Ground-based infrared remote sensing of cloud properties over the Antarctic Plateau. Part II: cloud optical depths and particle sizes. J. Appl. Meteorol. 40, 1279–1294 (2001)

    Article  ADS  Google Scholar 

  21. Guo, G., Ji, Q., Yang, P. & Tsay, S.-C. Remote sensing of cirrus optical and microphysical properties from ground-based infrared radiometric measurements—Part II: Retrievals from CRYSTAL-FACE measurements. IEEE Geosci. Rem. Sens. Lett. 2, 132–135 (2005)

    Article  ADS  Google Scholar 

  22. Shupe, M. D. & Intrieri, J. M. Cloud radiative forcing of the Arctic surface: the influence of cloud properties, surface albedo, and solar zenith angle. J. Clim. 17, 616–628 (2004)

    Article  ADS  Google Scholar 

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

  24. Penner, J. E., Dong, X. & Chen, Y. Observational evidence of a change in radiative forcing due to the aerosol indirect effect. Nature 427, 231–234 (2004)

    Article  ADS  CAS  Google Scholar 

  25. Leontyeva, E. & Stamnes, K. Estimations of cloud optical thickness from ground-based measurements of incoming solar radiation in the Arctic. J. Clim. 7, 566–578 (1994)

    Article  ADS  Google Scholar 

  26. Jiang, H. J., Feingold, G., Cotton, W. R. & Duynkerke, P. G. Large-eddy simulations of entrainment of cloud condensation nuclei into the Arctic boundary layer: May 18, 1998, FIRE/SHEBA case study. J. Geophys. Res. 106, 15113–15122 (2001)

    Article  ADS  Google Scholar 

  27. Morrison, H., Curry, J. A., Shupe, M. D. & Zuidema, P. A new double-moment microphysics parameterization for application in cloud and climate models. Part II: Single-column modeling of arctic clouds. J. Atmos. Sci. 62, 1678–1693 (2005)

    Article  ADS  Google Scholar 

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Acknowledgements

This work was supported by the DOE ARM programme. We thank J. Ogren for access to the NOAA CMDL aerosol data.

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Correspondence to Dan Lubin.

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Reprints and permissions information is available at npg.nature.com/reprintsandpermissions. The authors declare no competing financial interests.

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Lubin, D., Vogelmann, A. A climatologically significant aerosol longwave indirect effect in the Arctic. Nature 439, 453–456 (2006). https://doi.org/10.1038/nature04449

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