 |
| Titel |
Characterization of road freight transportation and its impact on the national emission inventory in China |
| VerfasserIn |
X. F. Yang, H. Liu, H. Y. Man, K. B. He |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 15, no. 4 ; Nr. 15, no. 4 (2015-02-26), S.2105-2118 |
| Datensatznummer |
250119462
|
| Publikation (Nr.) |
 copernicus.org/acp-15-2105-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
Diesel trucks are major contributors of nitrogen oxides (NOx) and
primary particulate matter smaller than 2.5 μm (PM2.5) in the
transportation sector. However, there are more obstacles to existing
estimations of diesel-truck emissions compared with those of cars. The
obstacles include both inappropriate methodology and missing basic data in
China. According to our research, a large number of trucks are conducting
long-distance intercity or interprovincial transportation. Thus, the method
used by most existing inventories, based on local registration number, is
inappropriate. A road emission intensity-based (REIB) approach is introduced
in this research instead of registration-population-based approach. To
provide efficient data for the REIB approach, 1060 questionnaire responses
and approximately 1.7 million valid seconds of onboard GPS monitoring data
were collected in China.
The estimated NOx and PM2.5 emissions from diesel freight
trucks in China were 5.0 (4.8–7.2) million tonnes and 0.20 (0.17–0.22)
million tonnes, respectively, in 2011. The province-based emission inventory is
also established using the REIB approach. It was found that the driving
conditions on different types of road have significant impacts on the
emission levels of freight trucks. The largest differences among the emission
factors (in g km−1) on different roads exceed 70 and 50% for
NOx and PM2.5, respectively. A region with more intercity freeways
or national roads tends to have more NOx emissions, while urban
streets play a more important role in primary PM2.5 emissions from
freight trucks. Compared with the inventory of the Ministry of Environment Protection, which
allocates emissions according to local truck registration number and neglects
interregional long-distance transport trips, the differences for
NOx and PM2.5 are +28 and −57%,
respectively. The REIB approach matches better with traffic statistical data
on a provincial level. Furthermore, the different driving conditions on the
different roads types are no longer overlooked with this approach. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|