| Autor: |
HAMMER, SAMUEL, VOGEL, FELIX, KAUL, MARKUS, LEVIN, INGEBORG |
| Předmět: |
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| Zdroj: |
Tellus: Series B; Jul2009, Vol. 61 Issue 3, p547-555, 9p, 2 Charts, 5 Graphs |
| Abstrakt: |
The hydrogen-to-carbon monoxide (H2/CO) emission ratio of anthropogenic combustion sources was determined from more than two years of quasi-continuous atmospheric observations in Heidelberg (49°24′ N, 8°42′ E), located in the polluted Rhein-Neckar region. Evaluating concurrent mixing ratio changes of H2 and CO during morning rush hours yielded mean molar H2/CO ratios of 0.40 ± 0.06, while respective results inferred from synoptic pollution events gave a mean value of 0.31 ± 0.05 mole H2/mole CO. After correction for the influence of the H2 soil sink on the measured ratios, mean values of 0.46 ± 0.07 resp. 0.48 ± 0.07 mole H2/mole CO were obtained, which are in excellent agreement with direct source studies of traffic emissions in the Heidelberg/Mannheim region (0.448 ± 0.003 mole H2/mole CO). Including results from other European studies, our best estimate of the mean H2/CO emission ratio from anthropogenic combustion sources (mainly traffic) ranges from 0.45 to 0.48 mole H2/mole CO, which is about 20% smaller than the value of 0.59 mole H2/mole CO which is frequently used as the basis to calculate global H2 emissions from anthropogenic combustion sources. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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