Heterogeneous chemistry involving methanol in tropospheric clouds
Article first published online: 23 MAR 2004
Copyright 2004 by the American Geophysical Union.
Geophysical Research Letters
Volume 31, Issue 6, March 2004
How to Cite
2004), Heterogeneous chemistry involving methanol in tropospheric clouds, Geophys. Res. Lett., 31, L06114, doi:10.1029/2003GL018775., , , , , and (
- Issue published online: 23 MAR 2004
- Article first published online: 23 MAR 2004
- Manuscript Accepted: 20 FEB 2004
- Manuscript Revised: 2 DEC 2003
- Manuscript Received: 4 OCT 2003
 In this report we analyze airborne measurements to suggest that methanol in biomass burning smoke is lost heterogeneously in clouds. When a smoke plume intersected a cumulus cloud during the SAFARI 2000 field project, the observed methanol gas phase concentration rapidly declined. Current understanding of gas and aqueous phase chemistry cannot explain the loss of methanol documented by these measurements. Two plausible heterogeneous reactions are proposed to explain the observed simultaneous loss and production of methanol and formaldehyde, respectively. If the rapid heterogeneous processing of methanol, seen in a cloud impacted by smoke, occurs in more pristine clouds, it could affect the oxidizing capacity of the troposphere on a global scale.