Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air
Measurements of acetone, methanol, acetaldehyde and a range of non-methane hydrocarbons have been made in North Atlantic marine air at the Mace Head observatory. Under maritime conditions the combination of OVOCs (acetone, methanol and acetaldehyde) contributed up to 85% of the total mass of measure...
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ftdoajarticles:oai:doaj.org/article:b0e6a64943dc4dc29d5303128d7ab3d7 2023-05-15T17:30:33+02:00 Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air A. C. Lewis J. R. Hopkins L. J. Carpenter J. Stanton K. A. Read M. J. Pilling 2005-01-01T00:00:00Z https://doaj.org/article/b0e6a64943dc4dc29d5303128d7ab3d7 EN eng Copernicus Publications http://www.atmos-chem-phys.net/5/1963/2005/acp-5-1963-2005.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/b0e6a64943dc4dc29d5303128d7ab3d7 Atmospheric Chemistry and Physics, Vol 5, Iss 7, Pp 1963-1974 (2005) Physics QC1-999 Chemistry QD1-999 article 2005 ftdoajarticles 2022-12-31T03:49:45Z Measurements of acetone, methanol, acetaldehyde and a range of non-methane hydrocarbons have been made in North Atlantic marine air at the Mace Head observatory. Under maritime conditions the combination of OVOCs (acetone, methanol and acetaldehyde) contributed up to 85% of the total mass of measured non methane organics in air and up to 80% of the OH radical organic sink, when compared with the sum of all other organic compounds including non-methane hydrocarbons, DMS and OH-reactive halocarbons (trichloromethane and tetrachloroethylene). The observations showed anomalies in the variance and abundance of acetaldehyde and acetone over that expected for species with a remote terrestrial emission source and OH controlled chemical lifetime. A detailed model incorporating an explicit chemical degradation mechanism indicated in situ formation during air mass transport was on timescales longer than the atmospheric lifetime of precursor hydrocarbons or primary emission. The period over which this process was significant was similar to that of airmass motion on intercontinental scales, and formation via this route may reproduce that of a widespread diffuse source. The model indicates that continued short chain OVOC formation occurs many days from the point of emission, via longer lived intermediates of oxidation such as organic peroxides and long chain alcohols. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Mace ENVELOPE(155.883,155.883,-81.417,-81.417) |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Physics QC1-999 Chemistry QD1-999 A. C. Lewis J. R. Hopkins L. J. Carpenter J. Stanton K. A. Read M. J. Pilling Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Measurements of acetone, methanol, acetaldehyde and a range of non-methane hydrocarbons have been made in North Atlantic marine air at the Mace Head observatory. Under maritime conditions the combination of OVOCs (acetone, methanol and acetaldehyde) contributed up to 85% of the total mass of measured non methane organics in air and up to 80% of the OH radical organic sink, when compared with the sum of all other organic compounds including non-methane hydrocarbons, DMS and OH-reactive halocarbons (trichloromethane and tetrachloroethylene). The observations showed anomalies in the variance and abundance of acetaldehyde and acetone over that expected for species with a remote terrestrial emission source and OH controlled chemical lifetime. A detailed model incorporating an explicit chemical degradation mechanism indicated in situ formation during air mass transport was on timescales longer than the atmospheric lifetime of precursor hydrocarbons or primary emission. The period over which this process was significant was similar to that of airmass motion on intercontinental scales, and formation via this route may reproduce that of a widespread diffuse source. The model indicates that continued short chain OVOC formation occurs many days from the point of emission, via longer lived intermediates of oxidation such as organic peroxides and long chain alcohols. |
format |
Article in Journal/Newspaper |
author |
A. C. Lewis J. R. Hopkins L. J. Carpenter J. Stanton K. A. Read M. J. Pilling |
author_facet |
A. C. Lewis J. R. Hopkins L. J. Carpenter J. Stanton K. A. Read M. J. Pilling |
author_sort |
A. C. Lewis |
title |
Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air |
title_short |
Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air |
title_full |
Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air |
title_fullStr |
Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air |
title_full_unstemmed |
Sources and sinks of acetone, methanol, and acetaldehyde in North Atlantic marine air |
title_sort |
sources and sinks of acetone, methanol, and acetaldehyde in north atlantic marine air |
publisher |
Copernicus Publications |
publishDate |
2005 |
url |
https://doaj.org/article/b0e6a64943dc4dc29d5303128d7ab3d7 |
long_lat |
ENVELOPE(155.883,155.883,-81.417,-81.417) |
geographic |
Mace |
geographic_facet |
Mace |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Atmospheric Chemistry and Physics, Vol 5, Iss 7, Pp 1963-1974 (2005) |
op_relation |
http://www.atmos-chem-phys.net/5/1963/2005/acp-5-1963-2005.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 https://doaj.org/article/b0e6a64943dc4dc29d5303128d7ab3d7 |
_version_ |
1766127383162650624 |