Emissions of isoprene, monoterpene and short-chained carbonyl compounds from Eucalyptus spp. in southern Australia

• Published in: Atmospheric environment (1994) Vol. 43; no. 19; pp. 3035 - 3043
• Main Authors: Winters, Anthony J., Adams, Mark A., Bleby, Tim M., Rennenberg, Heinz, Steigner, Dominik, Steinbrecher, Rainer, Kreuzwieser, Jürgen
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-06-2009; Elsevier
• Subjects: Acetaldehyde; Acetone; Carbonyl; Carbonyls; Chemical composition and interactions. Ionic interactions and processes; Correlation; Earth, ocean, space; Emission; Ethyl alcohol; Eucalyptus; Eucalyptus camaldulensis; Eucalyptus globulus; Eucalyptus grandis; Exact sciences and technology; External geophysics; Formaldehyde; Isoprene; Meteorology; Monoterpene; VOC emission; Volatile organic compounds; Australia; South Australia; Volatile organic compounds; VOC emission; Eucalyptus; DNPH; Monoterpene; PPFD; VOC; Carbonyl; Isoprene; Formaldehyde; Acetaldehyde; Acetone; volatile organic compounds; Australasia; Emission content; ketones; troposphere; diurnal variations; Air biosphere interaction; Dicotyledones; Angiospermae; Myrtaceae; hydrocarbons; Aldehyde; Biogenic factor; Terpene; Atmospheric chemistry; Spermatophyta; organic compounds; Comparative study
• ISSN: 1352-2310; 1873-2844
• DOI: 10.1016/j.atmosenv.2009.03.026

Eucalypts are among the highest emitters of biogenic volatile organic compounds, yet there is relatively little data available from field studies of this genus. Emissions of isoprene, monoterpenes and the short-chained carbonyls formaldehyde, acetaldehyde and acetone were determined from four species (
Eucalyptus camaldulensis,
Eucalyptus globulus,
Eucalyptus grandis, and
Eucalytpus viminalis) in Australia. A smaller comparative study was conducted on
E. camaldulensis in south-eastern Australia. Carbonyl emissions, reported here for the first time from eucalypts, were generally comparable with rates reported for other species, with diurnal emissions peaking at about 4, 75 and 34 nmol m
−2 min
−1 for acetone, formaldehyde and acetaldehyde respectively. There was wide variation in diurnal isoprene and monoterpene emissions between species, but under standard conditions, isoprene emissions were much lower than previous reports. Conversely, standard emission rates of monoterpenes were as much as six times greater than previous reports for some species. Emission of each carbonyl was correlated with its ambient concentration across different species, but more weakly related to temperature. Acetaldehyde emission in particular was significantly correlated with transpiration, but not with sap flow or with ethanol concentrations in xylem sap, suggesting fermentation within the leaf and stomatal conductance are primary controlling processes. Differences in acetaldehyde exchange velocities between sites, in addition to transpiration differences, suggest stomata may indeed exert long term emission regulation, in contrast to compounds for which no biological sink exists.