 |
| Titel |
Impact of a future H2-based road transportation sector on the composition and chemistry of the atmosphere – Part 2: Stratospheric ozone |
| VerfasserIn |
D. Wang, W. Jia, S. C. Olsen, D. J. Wuebbles, M. K. Dubey, A. A. Rockett |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 13 ; Nr. 13, no. 13 (2013-07-01), S.6139-6150 |
| Datensatznummer |
250018725
|
| Publikation (Nr.) |
 copernicus.org/acp-13-6139-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
| The prospective future adoption of molecular hydrogen (H2) to power the road transportation
sector could greatly improve tropospheric air quality but also raises the
question of whether the adoption would have adverse effects on the stratospheric
ozone. The possibility of undesirable impacts must be fully evaluated
to guide future policy decisions. Here we evaluate the possible impact of a
future (2050) H2-based road transportation sector on stratospheric
composition and chemistry, especially on the stratospheric ozone, with the
MOZART (Model for OZone And Related chemical Tracers) model. Since future growth is highly uncertain, we
evaluate the impact of two world evolution scenarios, one based on an IPCC
(Intergovernmental Panel on Climate Change) high-emitting scenario (A1FI)
and the other on an IPCC low-emitting scenario (B1), as well as two technological options: H2 fuel cells and H2
internal combustion engines. We assume a H2 leakage rate of 2.5% and
a complete market penetration of H2 vehicles in 2050. The model
simulations show that a H2-based road transportation sector would
reduce stratospheric ozone concentrations as a result of perturbed catalytic
ozone destruction cycles. The magnitude of the impact depends on which
growth scenario evolves and which H2 technology option is
applied. For the evolution growth scenario, stratospheric ozone
decreases more in the H2 fuel cell scenarios than in the H2
internal combustion engine scenarios because of the NOx emissions in
the latter case. If the same technological option is applied, the impact is
larger in the A1FI emission scenario. The largest impact, a 0.54%
decrease in annual average global mean stratospheric column ozone, is found
with a H2 fuel cell type road transportation sector in the A1FI
scenario; whereas the smallest impact, a 0.04% increase in stratospheric
ozone, is found with applications of H2 internal combustion engine
vehicles in the B1 scenario. The impacts of the other two scenarios fall
between the above two boundary scenarios. However, the magnitude of these
changes is much smaller than the increases in 2050 stratospheric ozone
projected, as stratospheric ozone is expected to recover due to the limits in ozone
depleting substance emissions imposed in the Montreal Protocol. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|