Biomass burning as a source of formaldehyde, acetaldehyde, methanol, acetone, acetonitrile, and hydrogen cyanide

Geophysical Research Letters - Tập 26 Số 8 - Trang 1161-1164 - 1999
Rupert Holzinger1, C. Warneke1, Armin Hansel1, Alfons Jordan1, W. Lindinger1, D. Scharffe2, Gunnar W. Schade2, Paul J. Crutzen2
1Institut für Ionenphysik, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
2Atmospheric Chemistry Department, Max Planck Institute for Chemistry, J.J. Becher-Weg 27, 55128 Mainz, Germany

Tóm tắt

Using a novel experimental technique, based on proton transfer reaction mass spectrometry, from measurements of emissions from laboratory scale biomass burning experiments, we have estimated the source strengths of several potential HOx producing gases: formaldehyde, acetaldehyde, methanol and acetone. The derived global average emissions are 5–13; 3.8–10; 1.5‐4; 2.3‐6.1 Tg y−1, respectively. The resulting global average HOx production from photochemical decay of these gases is 3 × 109 molecules cm−2 s−1. Although relatively small in a global context, these emissions are significant for the photochemistry in fresh fire plumes. From our measurements are also estimated global source strengths from biomass burning for CH3CN and HCN of 0.4‐1.0; 0.2‐0.6 Tg y−1 respectively. The biomass burning emissions of CH3CN may well dominate the global source of this compound, which thus might well be a unique tracer for biomass burning. Some discrepancies between experimental studies must, however, be resolved.

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Geophysical Research Letters

Tập 26 Số 8

1161-1164

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