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| Titel: |
Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica |
| Auteur: |
S. S. Assonov C. A. M. Brenninkmeijer P. Jöckel R. Mulvaney S. Bernard J. Chappellaz |
| Verschenen in: |
Atmospheric chemistry and physics |
| Paginering: | Jaargang 7 (2007) nr. 2 pagina's 295-308 |
| Jaar: |
2007 |
| Inhoud: |
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±7 to 52.5±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. |
| Uitgever: |
Copernicus GmbH (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 8 van 22 gevonden artikelen
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