Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/28279
Title: Global distributions of acetone in the upper troposphere from MIPAS spectra
Authors: Moore, D.P.
Remedios, J.J.
Waterfall, A.M.
First Published: 2012
Publisher: Copernicus GmbH (Copernicus Publications) on behalf of the European Geosciences Union (EGU).
Citation: Atmospheric Chemistry and Physics, 2012, 12 (2), pp. 757-768 (12)
Abstract: This study reports the first global measurements of acetone (C[subscript 3]H[subscript 6]O) in the upper troposphere (UT). Profiles were obtained between 9 km and 15 km from measurements made by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) onboard Envisat in August 2003. Errors per profile are lower than 40 % between 180 hPa and 350 hPa. We report strong hemispheric differences in the acetone volume mixing ratios (VMRs), with average concentrations highest in the Northern Hemisphere (NH) mid-latitude UT, between 1000 pptv and 1600 pptv with maxima up to 2300 pptv. Our results show a strong enhancement of acetone relative to CO, particularly over Europe (7 pptv ppbv[superscript −1]), confirming aircraft studies. Ten-day backward trajectories from these high European values show strong contributions from air flows over North America (56 %) and 25 % from Southernmost Asia. Enhanced acetone is also observed over Greenland, Siberia and biomass burning regions of Africa. Zonal distributions show that acetone VMRs decrease rapidly with increasing altitude (decreasing pressure), particularly in the NH. Poleward of 45° S, acetone VMRs remain fairly consistent with average VMRs between 400 pptv and 500 pptv. In 5-day averages at 9 km, NH VMRs poleward of 45° N are consistently higher than Southern Hemisphere observations poleward of 45° S, by between 750 pptv and 1100 pptv. The results show a clear influence of mid-latitude and transport processes on the acetone summertime distribution.
DOI Link: 10.5194/acp-12-757-2012
ISSN: 1680-7316
eISSN: 1680-7324
Links: http://www.atmos-chem-phys.net/12/757/2012/acp-12-757-2012.html
http://hdl.handle.net/2381/28279
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: © Author(s) 2012. This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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