Highly reactive light-dependent monoterpenes in the Amazon

A. B. Jardine, K. J. Jardine, Jose Fuentes, S. T. Martin, G. Martins, F. Durgante, V. Carneiro, N. Higuchi, A. O. Manzi, J. Q. Chambers

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Despite orders of magnitude difference in atmospheric reactivity and great diversity in biological functioning, little is known about monoterpene speciation in tropical forests. Here we report vertically resolved ambient air mixing ratios for 12 monoterpenes in a central Amazon rainforest including observations of the highly reactive cis-β-ocimene (160 ppt), trans-β-ocimene (79 ppt), and terpinolene (32 ppt) which accounted for an estimated 21% of total monoterpene composition yet 55% of the upper canopy monoterpene ozonolysis rate. All 12 monoterpenes showed a mixing ratio peak in the upper canopy, with three demonstrating subcanopy peaks in 7 of 11 profiles. Leaf level emissions of highly reactive monoterpenes accounted for up to 1.9% of photosynthesis confirming light-dependent emissions across several Amazon tree genera. These results suggest that highly reactive monoterpenes play important antioxidant roles during photosynthesis in plants and serve as near-canopy sources of secondary organic aerosol precursors through atmospheric photooxidation via ozonolysis.

Original languageEnglish (US)
Pages (from-to)1576-1583
Number of pages8
JournalGeophysical Research Letters
Volume42
Issue number5
DOIs
StatePublished - Mar 16 2015

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canopies
monoterpene
photosynthesis
mixing ratios
photooxidation
antioxidants
canopy
leaves
aerosols
mixing ratio
reactivity
air
profiles
rainforest
ambient air
antioxidant
tropical forest
aerosol

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Jardine, A. B., Jardine, K. J., Fuentes, J., Martin, S. T., Martins, G., Durgante, F., ... Chambers, J. Q. (2015). Highly reactive light-dependent monoterpenes in the Amazon. Geophysical Research Letters, 42(5), 1576-1583. https://doi.org/10.1002/2014GL062573
Jardine, A. B. ; Jardine, K. J. ; Fuentes, Jose ; Martin, S. T. ; Martins, G. ; Durgante, F. ; Carneiro, V. ; Higuchi, N. ; Manzi, A. O. ; Chambers, J. Q. / Highly reactive light-dependent monoterpenes in the Amazon. In: Geophysical Research Letters. 2015 ; Vol. 42, No. 5. pp. 1576-1583.
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Jardine, AB, Jardine, KJ, Fuentes, J, Martin, ST, Martins, G, Durgante, F, Carneiro, V, Higuchi, N, Manzi, AO & Chambers, JQ 2015, 'Highly reactive light-dependent monoterpenes in the Amazon', Geophysical Research Letters, vol. 42, no. 5, pp. 1576-1583. https://doi.org/10.1002/2014GL062573

Highly reactive light-dependent monoterpenes in the Amazon. / Jardine, A. B.; Jardine, K. J.; Fuentes, Jose; Martin, S. T.; Martins, G.; Durgante, F.; Carneiro, V.; Higuchi, N.; Manzi, A. O.; Chambers, J. Q.

In: Geophysical Research Letters, Vol. 42, No. 5, 16.03.2015, p. 1576-1583.

Research output: Contribution to journalArticle

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AU - Chambers, J. Q.

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Jardine AB, Jardine KJ, Fuentes J, Martin ST, Martins G, Durgante F et al. Highly reactive light-dependent monoterpenes in the Amazon. Geophysical Research Letters. 2015 Mar 16;42(5):1576-1583. https://doi.org/10.1002/2014GL062573