On the long-term impact of emissions from central European cities on regional air quality

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10322396" target="_blank" >RIV/00216208:11320/16:10322396 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.5194/acp-16-1331-2016" target="_blank" >http://dx.doi.org/10.5194/acp-16-1331-2016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/acp-16-1331-2016" target="_blank" >10.5194/acp-16-1331-2016</a>

Result language

angličtina

Original language name

On the long-term impact of emissions from central European cities on regional air quality

Original language description

The impact of urban emission from Central European cities on the present-day regional air quality is examined using the regional climate model RegCM4.2 coupled with the chemistry transport model CAMx, including two-way interactions. Simulations was carried out for the 2001-2010 period either with all urban emissions included (base case) or without considering urban emissions. Further, the sensitivity of ozone production to urban emissions was examined by performing reduction experiments with -20% emission perturbation of NOx and/or non-methane volatile organic compounds (NMVOC). The modeling system's air quality related outputs were evaluated using AirBase, and EMEP surface measurements. European air quality measures were chosen as metrics describing the cities emission impact on regional air pollution. Due to urban emissions, significant ozone titration occurs over cities while over rural areas remote from cities, ozone production is modeled, mainly in terms of number of exceedances and accumulated exceedances. Urban NOx, SO2 and PM2.5 emissions also significantly contribute to concentrations in the cities themselves (up to 50-70% for NOx and SO2, and up to 60% for PM2.5), but the contribution is large over rural areas as well (10-20 %). Although air pollution over cities is largely determined by the local urban emissions, considerable (often a few tens of %) fraction of the concentration is attributable to other sources from rural areas and minor cities. It is shown that to achieve significant ozone reduction over cities in central Europe, the emission control strategies have to focus on the reduction of NMVOC, as reducing NOx (due to suppressed titration) often leads to increased O-3. The influence over rural areas is however always in favor of improved air quality, i.e. both NOx and/or NMVOC reduction ends up in decreased ozone pollution, mainly in terms of exceedances.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DG - Atmospheric sciences, meteorology

OECD FORD branch

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Project

<a href="/en/project/GP13-19733P" target="_blank" >GP13-19733P: Modeling of impact of cities on regional climate and air quality</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Atmospheric Chemistry and Physics

ISSN

1680-7316

e-ISSN

—

Volume of the periodical

16

Issue of the periodical within the volume

3

Country of publishing house

DE - GERMANY

Number of pages

22

Pages from-to

1331-1352

UT code for WoS article

000371284100009

EID of the result in the Scopus database

2-s2.0-84958025549