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Title: Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia

Abstract

Tropical rainforests are an important source of isoprenoid and other volatile organic compound (VOC) emissions to the atmosphere. The seasonal variation of these compounds is however still poorly understood. In this study, vertical profiles of mixing ratios of isoprene, total monoterpenes and total sesquiterpenes, were measured within and above the canopy, in a primary rainforest in central Amazonia, using a proton transfer reaction – mass spectrometer (PTR-MS). Fluxes of these compounds from the canopy into the atmosphere were estimated from PTR-MS measurements by using an inverse Lagrangian transport model. Measurements were carried out continuously from September 2010 to January 2011, encompassing the dry and wet seasons. Mixing ratios were higher during the dry (isoprene – 2.68 ± 0.9 ppbv, total monoterpenes – 0.67 ± 0.3 ppbv; total sesquiterpenes – 0.09 ± 0.07 ppbv) than the wet season (isoprene – 1.66 ± 0.9 ppbv, total monoterpenes – 0.47 ± 0.2 ppbv; total sesquiterpenes – 0.03 ± 0.02 ppbv) for all compounds. Ambient air temperature and photosynthetically active radiation (PAR) behaved similarly. Daytime isoprene and total monoterpene mixing ratios were highest within the canopy, rather than near the ground or above the canopy. By comparison, daytime total sesquiterpene mixing ratios were highestmore » near the ground. Daytime fluxes varied significantly between seasons for all compounds. The maximums for isoprene (2.53 ± 0.5 µmol m-2 h-1) and total monoterpenes (1.77 ± 0.05 µmol m-2 h-1) were observed in the late dry season, whereas the maximum for total sesquiterpenes was found during the dry-to-wet transition season (0.77 ± 0.1 µmol m-2 h-1). These flux estimates suggest that the canopy is the main source of isoprenoids emitted into the atmosphere for all seasons. However, uncertainties in turbulence parameterization near the ground could affect estimates of fluxes that come from the ground. Leaf phenology seemed to be an important driver of seasonal variation of isoprenoid emissions. Although remote sensing observations of changes in leaf area index were used to estimate leaf phenology, MEGAN 2.1 did not fully capture the behavior of seasonal emissions observed in this study. This could be a result of very local effects on the observed emissions, but also suggest that other parameters need to be better determined in biogenic volatile organic compound (BVOC) models. Our results support established findings that seasonality of isoprenoids are driven by seasonal changes in light, temperature and leaf phenology. However, they suggest that leaf phenology and its role on isoprenoid production and emission from tropical plant species needs to be better understood in order to develop mechanistic explanations for seasonal variation in emissions. This also may reduce the uncertainties of model estimates associated with the responses to environmental factors. Therefore, this study strongly encourages long-term measurements of isoprenoid emissions, environmental factors and leaf phenology from leaf to ecosystem scale, with the purpose of improving BVOC model approaches that can characterize seasonality of isoprenoid emissions from tropical rainforests.« less

Authors:
 [1];  [2];  [3];  [1];  [4];  [5];  [6];  [6];  [7];  [8];  [9];  [10];  [11];  [7]
+ Show Author Affiliations
  1. National Inst. for Amazonian Research (INPA), Manaus (Brazil). Climate and Environment Dept.; Amazonas State Univ. (UEA), Manaus (Brazil)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Climate Science Dept. Earth Science Division
  3. Federal Univ. of Western Pará (UFOPA), Santarém (Brazil). Inst. of Engineering and Geoscience
  4. National Inst. for Amazonian Research (INPA), Manaus (Brazil). Climate and Environment Dept.; Amazonas State Univ. (UEA), Manaus (Brazil); Max Planck Inst. for Chemistry, Mainz (Germany). Biogeochemistry Dept.
  5. Univ. of Innsbruck (Austria). Inst. for Meteorology and Geophysics
  6. National Inst. for Amazonian Research (INPA), Manaus (Brazil). Ecology Dept.
  7. Univ. of California, Irvine, CA (United States). Dept. of Earth System Science
  8. Belgian Inst. for Space Aeronomy, Brussels (Belgium)
  9. Harvard Univ., Cambridge, MA (United States). School of Engineering and Applied Sciences. Dept. of Earth and Planetary Sciences
  10. Univ. of Sao Paulo (Brazil). Inst. of Physics
  11. National Inst. for Amazonian Research (INPA), Manaus (Brazil). Climate and Environment Dept.; Amazonas State Univ. (UEA), Manaus (Brazil); National Inst. for Spatial Research, Cachoeira Paulista (Brazil). Center of Weather Forecasting and Climate Studies
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Science Foundation (NSF); National Council for Scientific and Technological Development (CNPq) (Brazil); European Space Agency (ESA)
OSTI Identifier:
1440922
Grant/Contract Number:  
AC02-05CH11231; 0730305; CHE 0216226; 4000104001/11/I-NB
Resource Type:
Accepted Manuscript
Journal Name:
Atmospheric Chemistry and Physics (Online)
Additional Journal Information:
Journal Name: Atmospheric Chemistry and Physics (Online); Journal Volume: 16; Journal Issue: 6; Journal ID: ISSN 1680-7324
Publisher:
European Geosciences Union
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES

Citation Formats

Alves, Eliane G., Jardine, Kolby, Tota, Julio, Jardine, Angela, Yanez-Serrano, Ana Maria, Karl, Thomas, Tavares, Julia, Nelson, Bruce, Gu, Dasa, Stavrakou, Trissevgeni, Martin, Scot, Artaxo, Paulo, Manzi, Antonio, and Guenther, Alex. Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia. United States: N. p., 2016. Web. doi:10.5194/acp-16-3903-2016.
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Alves, Eliane G., Jardine, Kolby, Tota, Julio, Jardine, Angela, Yanez-Serrano, Ana Maria, Karl, Thomas, Tavares, Julia, Nelson, Bruce, Gu, Dasa, Stavrakou, Trissevgeni, Martin, Scot, Artaxo, Paulo, Manzi, Antonio, & Guenther, Alex. Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia. United States. https://doi.org/10.5194/acp-16-3903-2016
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Alves, Eliane G., Jardine, Kolby, Tota, Julio, Jardine, Angela, Yanez-Serrano, Ana Maria, Karl, Thomas, Tavares, Julia, Nelson, Bruce, Gu, Dasa, Stavrakou, Trissevgeni, Martin, Scot, Artaxo, Paulo, Manzi, Antonio, and Guenther, Alex. Wed . "Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia". United States. https://doi.org/10.5194/acp-16-3903-2016. https://www.osti.gov/servlets/purl/1440922.
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@article{osti_1440922,
title = {Seasonality of isoprenoid emissions from a primary rainforest in central Amazonia},
author = {Alves, Eliane G. and Jardine, Kolby and Tota, Julio and Jardine, Angela and Yanez-Serrano, Ana Maria and Karl, Thomas and Tavares, Julia and Nelson, Bruce and Gu, Dasa and Stavrakou, Trissevgeni and Martin, Scot and Artaxo, Paulo and Manzi, Antonio and Guenther, Alex},
abstractNote = {Tropical rainforests are an important source of isoprenoid and other volatile organic compound (VOC) emissions to the atmosphere. The seasonal variation of these compounds is however still poorly understood. In this study, vertical profiles of mixing ratios of isoprene, total monoterpenes and total sesquiterpenes, were measured within and above the canopy, in a primary rainforest in central Amazonia, using a proton transfer reaction – mass spectrometer (PTR-MS). Fluxes of these compounds from the canopy into the atmosphere were estimated from PTR-MS measurements by using an inverse Lagrangian transport model. Measurements were carried out continuously from September 2010 to January 2011, encompassing the dry and wet seasons. Mixing ratios were higher during the dry (isoprene – 2.68 ± 0.9 ppbv, total monoterpenes – 0.67 ± 0.3 ppbv; total sesquiterpenes – 0.09 ± 0.07 ppbv) than the wet season (isoprene – 1.66 ± 0.9 ppbv, total monoterpenes – 0.47 ± 0.2 ppbv; total sesquiterpenes – 0.03 ± 0.02 ppbv) for all compounds. Ambient air temperature and photosynthetically active radiation (PAR) behaved similarly. Daytime isoprene and total monoterpene mixing ratios were highest within the canopy, rather than near the ground or above the canopy. By comparison, daytime total sesquiterpene mixing ratios were highest near the ground. Daytime fluxes varied significantly between seasons for all compounds. The maximums for isoprene (2.53 ± 0.5 µmol m-2 h-1) and total monoterpenes (1.77 ± 0.05 µmol m-2 h-1) were observed in the late dry season, whereas the maximum for total sesquiterpenes was found during the dry-to-wet transition season (0.77 ± 0.1 µmol m-2 h-1). These flux estimates suggest that the canopy is the main source of isoprenoids emitted into the atmosphere for all seasons. However, uncertainties in turbulence parameterization near the ground could affect estimates of fluxes that come from the ground. Leaf phenology seemed to be an important driver of seasonal variation of isoprenoid emissions. Although remote sensing observations of changes in leaf area index were used to estimate leaf phenology, MEGAN 2.1 did not fully capture the behavior of seasonal emissions observed in this study. This could be a result of very local effects on the observed emissions, but also suggest that other parameters need to be better determined in biogenic volatile organic compound (BVOC) models. Our results support established findings that seasonality of isoprenoids are driven by seasonal changes in light, temperature and leaf phenology. However, they suggest that leaf phenology and its role on isoprenoid production and emission from tropical plant species needs to be better understood in order to develop mechanistic explanations for seasonal variation in emissions. This also may reduce the uncertainties of model estimates associated with the responses to environmental factors. Therefore, this study strongly encourages long-term measurements of isoprenoid emissions, environmental factors and leaf phenology from leaf to ecosystem scale, with the purpose of improving BVOC model approaches that can characterize seasonality of isoprenoid emissions from tropical rainforests.},
doi = {10.5194/acp-16-3903-2016},
journal = {Atmospheric Chemistry and Physics (Online)},
number = 6,
volume = 16,
place = {United States},
year = {Wed Mar 23 00:00:00 EDT 2016},
month = {Wed Mar 23 00:00:00 EDT 2016}
}
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https://doi.org/10.5194/acp-16-3903-2016
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    • Bauwens, Maite; Stavrakou, Trissevgeni; Müller, Jean-François
    • Atmospheric Chemistry and Physics, Vol. 16, Issue 15
    • DOI: 10.5194/acp-16-10133-2016

    Contributions of mobile, stationary and biogenic sources to air pollution in the Amazon rainforest: a numerical study with the WRF-Chem model
    journal, January 2017

    • Abou Rafee, Sameh A.; Martins, Leila D.; Kawashima, Ana B.
    • Atmospheric Chemistry and Physics, Vol. 17, Issue 12
    • DOI: 10.5194/acp-17-7977-2017

    Observations of sesquiterpenes and their oxidation products in central Amazonia during the wet and dry seasons
    journal, January 2018

    • Yee, Lindsay D.; Isaacman-VanWertz, Gabriel; Wernis, Rebecca A.
    • Atmospheric Chemistry and Physics, Vol. 18, Issue 14
    • DOI: 10.5194/acp-18-10433-2018

    Low-level summertime isoprene observed at a forested mountaintop site in southern China: implications for strong regional atmospheric oxidative capacity
    journal, January 2018

    • Gong, Daocheng; Wang, Hao; Zhang, Shenyang
    • Atmospheric Chemistry and Physics, Vol. 18, Issue 19
    • DOI: 10.5194/acp-18-14417-2018

    Monoterpene chemical speciation in a tropical rainforest:variation with season, height, and time of dayat the Amazon Tall Tower Observatory (ATTO)
    journal, January 2018

    • Yáñez-Serrano, Ana María; Nölscher, Anke Christine; Bourtsoukidis, Efstratios
    • Atmospheric Chemistry and Physics, Vol. 18, Issue 5
    • DOI: 10.5194/acp-18-3403-2018

    Chemical composition of ultrafine aerosol particles in central Amazonia during the wet season
    journal, January 2019

    • Glicker, Hayley S.; Lawler, Michael J.; Ortega, John
    • Atmospheric Chemistry and Physics, Vol. 19, Issue 20
    • DOI: 10.5194/acp-19-13053-2019

    Contributions of biomass-burning, urban, and biogenic emissions to the concentrations and light-absorbing properties of particulate matter in central Amazonia during the dry season
    journal, January 2019

    • de Sá, Suzane S.; Rizzo, Luciana V.; Palm, Brett B.
    • Atmospheric Chemistry and Physics, Vol. 19, Issue 12
    • DOI: 10.5194/acp-19-7973-2019

    A sampler for atmospheric volatile organic compounds by copter unmanned aerial vehicles
    journal, January 2019

    • McKinney, Karena A.; Wang, Daniel; Ye, Jianhuai
    • Atmospheric Measurement Techniques, Vol. 12, Issue 6
    • DOI: 10.5194/amt-12-3123-2019

    Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia
    journal, January 2018

    • Alves, Eliane G.; Tóta, Julio; Turnipseed, Andrew
    • Biogeosciences, Vol. 15, Issue 13
    • DOI: 10.5194/bg-15-4019-2018

    Leaf phenology as one important driver of seasonal changes in isoprene emission in central Amazonia
    posted_content, March 2018

    • Alves, Eliane G.; Tóta, Julio; Turnipseed, Andrew
    • Biogeosciences Discussions
    • DOI: 10.5194/bg-2018-26

    Evolutionary ecology of chemosensation and its role in sensory drive
    journal, July 2018

    • Yohe, Laurel R.; Brand, Philipp
    • Current Zoology, Vol. 64, Issue 4
    • DOI: 10.1093/cz/zoy048

    Opportunities and challenges for the sustainable production of structurally complex diterpenoids in recombinant microbial systems
    journal, May 2017

    • Kemper, Katarina; Hirte, Max; Reinbold, Markus
    • Beilstein Journal of Organic Chemistry, Vol. 13
    • DOI: 10.3762/bjoc.13.85
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