 |
| Titel |
Islisberg-2011 - measurements of vehicle emissions in a highway tunnel: CO2, CO, H2, N2O, O2/N2; stable isotopes of CO2, CO and H2 |
| VerfasserIn |
M. E. Popa, M. K. Vollmer, W. Brand, A. Jordan, M. Rothe, A. M. Batenburg, S. Pathirana, T. Röckmann |
| Konferenz |
EGU General Assembly 2012
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250070811
|
|
|
|
|
|
| Zusammenfassung |
| A measurement campaign of vehicle emissions took place in the summer of 2011 in the
Islisberg highway tunnel in Switzerland. The purpose was to characterize the present vehicle
fleet in terms of emission rates of H2, CO, CO2 and N2O; emission ratios O2:CO2, CO:CO2
and H2:CO, and isotopic signatures in CO2, CO and H2. The tunnel has a separate bore for
each traffic direction, and no active ventilation, thus offering an ideal setting for
measuring large traffic signals without significant interference of other sources or
sinks.
Two RGA analyzers were installed at the entrance and at the exit of the tunnel for continuous,
in-situ measurements of H2 and CO. This in-situ dataset allows to determine the CO and H2
emission rates and the H2:CO emission ratios for different traffic conditions and
vehicle types (traffic count data are also available). Additionally, a large number of
flask samples were filled at both entrance and exit and were distributed for various
measurements at three institutes. Some of the flasks were analyzed at MPI-BGC (Jena,
Germany) for CO2, CO, N2O, H2, O2/N2 and 13C and 18O in CO2. A second flask
batch was analyzed at EMPA (Switzerland) for H2 and CO, and at IMAU (Utrecht,
Netherlands) for the corresponding H2 and CO isotopes. A third flask batch travelled to all
three institutes for a complete set of measurements, serving also as a consistency
check.
We will present the initial results, discussing the following points:
- H2 and CO emission rates, and H2:CO ratios of vehicle emissions;
- H2 and CO isotopic composition;
- CO:CO2 ratios;
- O2:CO2 ratios;
- 13C and 18O in CO2. |
|
|
|
|
|
|