skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Highly reactive light-dependent monoterpenes in the Amazon

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.

Authors:
 [1];  [2];  [3];  [4];  [1];  [1];  [1];  [1];  [1];  [5]
  1. Instituto Nacional de Pesquisas da Amazonia, Manus (Brazil)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Pennsylvania State Univ., University Park, PA (United States)
  4. Harvard Univ., Cambridge, MA (United States)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1240455
Alternate Identifier(s):
OSTI ID: 1213451; OSTI ID: 1295978; OSTI ID: 1512175
Grant/Contract Number:  
AC02-05CH11231; AC02‐05CH11231
Resource Type:
Published Article
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 42; Journal Issue: 5; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 59 BASIC BIOLOGICAL SCIENCES; secondary organic aerosols; vertical forest structure; ozonolysis; atmospheric oxidation; light‐dependent monoterpenes; tropical VOC emissions

Citation Formats

Jardine, A. B., Jardine, K. J., Fuentes, J. D., Martin, S. T., Martins, G., Durgante, F., Carneiro, V., Higuchi, N., Manzi, A. O., and Chambers, J. Q. Highly reactive light-dependent monoterpenes in the Amazon. United States: N. p., 2015. Web. doi:10.1002/2014GL062573.
Jardine, A. B., Jardine, K. J., Fuentes, J. D., 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. United States. doi:10.1002/2014GL062573.
Jardine, A. B., Jardine, K. J., Fuentes, J. D., Martin, S. T., Martins, G., Durgante, F., Carneiro, V., Higuchi, N., Manzi, A. O., and Chambers, J. Q. Wed . "Highly reactive light-dependent monoterpenes in the Amazon". United States. doi:10.1002/2014GL062573.
@article{osti_1240455,
title = {Highly reactive light-dependent monoterpenes in the Amazon},
author = {Jardine, A. B. and Jardine, K. J. and Fuentes, J. D. and Martin, S. T. and Martins, G. and Durgante, F. and Carneiro, V. and Higuchi, N. and Manzi, A. O. and Chambers, J. Q.},
abstractNote = {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.},
doi = {10.1002/2014GL062573},
journal = {Geophysical Research Letters},
number = 5,
volume = 42,
place = {United States},
year = {2015},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1002/2014GL062573

Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

Save / Share: