Publication
Title
Contribution of volatile organic compound fluxes to the ecosystem carbon budget of a poplar short‐rotation plantation
Author
Abstract
Biogenic volatile organic compounds (BVOCs) are major precursors of both ozone and secondary organic aerosols (SOA) in the troposphere and represent a non‐negligible portion of the carbon fixed by primary producers, but long‐term ecosystem‐scale measurements of their exchanges with the atmosphere are lacking. In this study, the fluxes of 46 ions corresponding to 36 BVOCs were continuously monitored along with the exchanges of mass (carbon dioxide and water vapor) and energy (sensible and latent heat) for an entire year in a poplar (Populus) short‐rotation crop (SRC), using the eddy covariance methodology. BVOC emissions mainly consisted of isoprene, acetic acid, and methanol. Total net BVOC emissions were 19.20 kg C ha−1 yr−1, which represented 0.63% of the net ecosystem exchange (NEE), resulting from −23.59 Mg C ha−1 yr−1 fixed as CO2 and 20.55 Mg C ha−1 yr−1 respired as CO2 from the ecosystem. Isoprene emissions represented 0.293% of NEE, being emitted at a ratio of 1 : 1709 mol isoprene per mol of CO2 fixed. Based on annual ecosystem‐scale measurements, this study quantified for the first time that BVOC carbon emissions were lower than previously estimated in other studies (0.52% of NEE) on poplar trees. Furthermore, the seasonal and diurnal emission patterns of isoprene, methanol, and other BVOCs provided a better interpretation of the relationships with ecosystem CO2 and water vapor fluxes, with air temperature, vapor pressure deficit, and photosynthetic photon flux density.
Language
English
Source (journal)
GCB bioenergy. - Oxford, 2009, currens
GCB bioenergy. - Oxford, 2009, currens
Publication
Oxford : 2018
ISSN
1757-1693 [print]
1757-1707 [online]
Volume/pages
10 :6 (2018) , p. 405-414
ISI
000431733700004
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
Project info
System analysis of a bio-energy plantation: full greenhouse gas balance and energy accounting. (POPFULL)
Impact of poplar bioenergy cultivation on ozone and volatile organic compound emissions (SRF-OZO).
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 05.04.2018
Last edited 20.09.2021
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