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Isoprene in poplar emissions: effects on new particle formation and OH concentrations

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Author(s): A. Kiendler-Scharr | S. Andres | M. Bachner | K. Behnke | S. Broch | A. Hofzumahaus | F. Holland | E. Kleist | T. F. Mentel | F. Rubach | M. Springer | B. Steitz | R. Tillmann | A. Wahner | J.-P. Schnitzler | J. Wildt

Journal: Atmospheric Chemistry and Physics Discussions
ISSN 1680-7367

Volume: 11;
Issue: 8;
Start page: 22417;
Date: 2011;
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ABSTRACT
Stress-induced volatile organic compound (VOC) emissions from transgenic Grey poplar, modified in isoprene emission potential were used for the investigation of photochemical secondary organic aerosol (SOA) formation. Nucleation rates of up to 3600 cm−3 s−1 were observed in our experiments. In poplar, acute ozone stress induces the emission of a wide array of VOCs dominated by sesquiterpenes and aromatic VOCs. Constitutive light-dependent emission of isoprene ranged between 66 nmol m−2 s−1 in non-transgenic controls (wild type WT) and nearly zero (
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