Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica

Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica

Trends of carbon monoxide (CO) for the past 100 years are reported as derived from Antarctic firn drilling expeditions. Only one of 3 campaigns provided high quality results. The trend was reconstructed using a firn air model in the forward mode to constrain age distributions and assuming the CO inc...

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Main Authors: S. S. Assonov, C. A. M. Brenninkmeijer, P. Jöckel, R. Mulvaney, S. Bernard, J. Chappellaz
Format: Article
Language:English
Published: Copernicus Publications 2007-01-01
Series:Atmospheric Chemistry and Physics
Online Access:http://www.atmos-chem-phys.net/7/295/2007/acp-7-295-2007.pdf
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spelling doaj-858bd303700f44bba64c49024332d5402020-11-25T00:46:51ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242007-01-0172295308Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, AntarcticaS. S. AssonovC. A. M. BrenninkmeijerP. JöckelR. MulvaneyS. BernardJ. ChappellazTrends of carbon monoxide (CO) for the past 100 years are reported as derived from Antarctic firn drilling expeditions. Only one of 3 campaigns provided high quality results. The trend was reconstructed using a firn air model in the forward mode to constrain age distributions and assuming the CO increase to be proportional to its major source, namely CH<sub>4</sub>. The results suggest that CO has increased by ~38%, from 38&plusmn;7 to 52.5&plusmn;1.5 ppbv over a period of roughly 100 years. The concentrations are on the volumetric scale which corresponds to ~1.08 of the scale used by NOAA/CMDL. The estimated CO increase is somewhat larger than what is estimated from the CO budget estimations and the CH<sub>4</sub> growth alone. The most likely explanation might be an increase in biomass burning emissions. Using CH<sub>3</sub>Cl as another proxy produces a very similar reconstruction.http://www.atmos-chem-phys.net/7/295/2007/acp-7-295-2007.pdf
collection DOAJ
language English
format Article
sources DOAJ
author S. S. Assonov
C. A. M. Brenninkmeijer
P. Jöckel
R. Mulvaney
S. Bernard
J. Chappellaz
spellingShingle S. S. Assonov
C. A. M. Brenninkmeijer
P. Jöckel
R. Mulvaney
S. Bernard
J. Chappellaz
Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
Atmospheric Chemistry and Physics
author_facet S. S. Assonov
C. A. M. Brenninkmeijer
P. Jöckel
R. Mulvaney
S. Bernard
J. Chappellaz
author_sort S. S. Assonov
title Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
title_short Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
title_full Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
title_fullStr Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
title_full_unstemmed Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
title_sort evidence for a co increase in the sh during the 20th century based on firn air samples from berkner island, antarctica
publisher Copernicus Publications
series Atmospheric Chemistry and Physics
issn 1680-7316
1680-7324
publishDate 2007-01-01
description Trends of carbon monoxide (CO) for the past 100 years are reported as derived from Antarctic firn drilling expeditions. Only one of 3 campaigns provided high quality results. The trend was reconstructed using a firn air model in the forward mode to constrain age distributions and assuming the CO increase to be proportional to its major source, namely CH<sub>4</sub>. The results suggest that CO has increased by ~38%, from 38&plusmn;7 to 52.5&plusmn;1.5 ppbv over a period of roughly 100 years. The concentrations are on the volumetric scale which corresponds to ~1.08 of the scale used by NOAA/CMDL. The estimated CO increase is somewhat larger than what is estimated from the CO budget estimations and the CH<sub>4</sub> growth alone. The most likely explanation might be an increase in biomass burning emissions. Using CH<sub>3</sub>Cl as another proxy produces a very similar reconstruction.
url http://www.atmos-chem-phys.net/7/295/2007/acp-7-295-2007.pdf
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