 |
| Titel |
Effects of various meteorological conditions and spatial emissionresolutions on the ozone concentration and ROG/NOx limitationin the Milan area (I) |
| VerfasserIn |
N. Baertsch-Ritter, J. Keller, J. Dommen, A. S. H. Prévôt |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 4, no. 2 ; Nr. 4, no. 2 (2004-03-17), S.423-438 |
| Datensatznummer |
250001601
|
| Publikation (Nr.) |
 copernicus.org/acp-4-423-2004.pdf |
|
|
|
|
|
| Zusammenfassung |
| The three-dimensional photochemical model UAM-V is used to investigate the
effects of various meteorological conditions and of the coarseness of
emission inventories on the ozone concentration and ROG/NOx limitation
of the ozone production in the Po Basin in the northern part of Italy. As a
base case, the high ozone episode with up to 200ppb on 13 May 1998 was
modelled and previously thoroughly evaluated with measurements gained during
a large field experiment. Systematic variations in meteorology are applied
to mixing height, air temperature, specific humidity and wind speed. Three
coarser emission inventories are obtained by resampling from 3x3km2 up
to 54x54km2 emission grids. The model results show that changes in
meteorological input files strongly influence ozone in this area. For
instance, temperature changes peak ozone by 10.1ppb/°C and the ozone
concentrations in Milan by 2.8ppb/°C. The net ozone formation in
northern Italy is more strongly temperature than humidity dependent, while
the humidity is very important for the ROG/NOx limitation of the ozone
production. For all meteorological changes (e.g. doubling the mixing
height), the modelled peak ozone remains ROG limited. A strong change
towards NOx sensitivity in the ROG limited areas is only found if much
coarser emission inventories were applied. Increasing ROG limited areas with
increasing wind speed are found, because the ROG limited ozone chemistry
induced by point sources is spread over a larger area. Simulations without
point sources tend to increase the NOx limited areas. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|