Brief Communication | Published:

Atmospheric science

Ultraviolet light and leaf emission of NOx

Nature volume 422, page 134 (13 March 2003) | Download Citation

Subjects

Abstract

Nitrogen oxides are trace gases that critically affect atmospheric chemistry and aerosol formation1. Vegetation is usually regarded as a sink for these gases, although nitric oxide and nitrogen dioxide have been detected as natural emissions from plants2,3. Here we use in situ measurements to show that solar ultraviolet radiation induces the emission of nitrogen oxide radicals (NOx) from Scots pine (Pinus sylvestris) shoots when ambient concentrations drop below one part per billion. Although this contribution is insignificant on a local scale, our findings suggest that global NOx emissions from boreal coniferous forests may be comparable to those produced by worldwide industrial and traffic sources.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1.

    & Atmospheric Chemistry and Physics: From Air Pollution to Climate Change (Wiley, New York, 1998).

  2. 2.

    , , , & J. Geophys. Res. 102 D, 5919–5927 (1997).

  3. 3.

    , , & Oecologia 127, 214–221 (2001).

  4. 4.

    et al. Trends Heat, Mass Momen. Transfer 4, 17–35 (1998).

  5. 5.

    et al. Plant Cell Environ. 22, 1297–1301 (1999).

  6. 6.

    , , , & Atmos. Environ. 36, 19–29 (2002).

  7. 7.

    Biogeochemistry 27, 155–170 (1994).

  8. 8.

    & Tellus B 46, 339–352 (1994).

  9. 9.

    & Atmos. Environ. 35, 975–983 (2001).

  10. 10.

    et al. J. Geophys. Res. 105, 24183–24190 (2000).

  11. 11.

    , & Science 289, 2291–2293 (2000).

Download references

Author information

Affiliations

  1. *Department of Forest Ecology, University of Helsinki, 00014 Helsinki, Finland

    • Pertti Hari
    •  & Maarit Raivonen
  2. †Department of Physics, University of Helsinki, 00014 Helsinki, Finland

    • Timo Vesala
    •  & Markku Kulmala
  3. ‡Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA

    • J. William Munger
  4. §Plant Research Department, Risø National Laboratory, 4000 Roskilde, Denmark

    • Kim Pilegaard

Authors

  1. Search for Pertti Hari in:

  2. Search for Maarit Raivonen in:

  3. Search for Timo Vesala in:

  4. Search for J. William Munger in:

  5. Search for Kim Pilegaard in:

  6. Search for Markku Kulmala in:

Competing interests

The authors declare no competing financial interests.

Corresponding author

Correspondence to Pertti Hari.

About this article

Publication history

Published

DOI

https://doi.org/10.1038/422134a

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.