Can we explain the trends in European ozone levels?
International audience Ozone levels in Europe are changing. Emissions of ozone precursors from Europe (NO x , CO and non-methane hydrocarbons) have been substantially reduced over the last 10?15 years, but changes in ozone levels can not be explained by changes in European emissions alone. In order...
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ftinsu:oai:HAL:hal-00301696v1 2023-11-12T04:22:31+01:00 Can we explain the trends in European ozone levels? Jonson, J. E. Simpson, D. Fagerli, H. Solberg, S. Norwegian Meteorological Institute Oslo (MET) Norwegian Institute for Air Research (NILU) 2005-08-15 https://hal.science/hal-00301696 https://hal.science/hal-00301696/document https://hal.science/hal-00301696/file/acpd-5-5957-2005.pdf en eng HAL CCSD European Geosciences Union hal-00301696 https://hal.science/hal-00301696 https://hal.science/hal-00301696/document https://hal.science/hal-00301696/file/acpd-5-5957-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301696 Atmospheric Chemistry and Physics Discussions, 2005, 5 (4), pp.5957-5985 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2005 ftinsu 2023-10-25T16:26:56Z International audience Ozone levels in Europe are changing. Emissions of ozone precursors from Europe (NO x , CO and non-methane hydrocarbons) have been substantially reduced over the last 10?15 years, but changes in ozone levels can not be explained by changes in European emissions alone. In order to explain the European trends in ozone since 1990 the EMEP regional photochemistry model has been run for the the years 1990 and 1995?2002. The EMEP model is a regional model centered over Europe but the model domain also includes most of the North Atlantic and the polar region. Climatological ozone data are used as initial and lateral boundary concentrations. Model results are compared to measurements over this timespan of 12 years. Possible causes for the measured trends in European surface ozone have been investigated using model sensitivity runs perturbing emissions and lateral boundary concentrations. The observed ozone trends at many European sites are only partially reproduced by global or regional photochemistry models, and possible reasons for this are discussed. The increase in winter ozone partially and the decrease in the magnitude of high ozone episodes is attributed to the decrease in ozone precursor emissions since 1990 by the model. Furthermore, the model calculations indicate that the emission reductions has resulted in a marked decrease in summer ozone in major parts of Europe, and in particular in Germany. Such a trend in summer ozone is likely to be difficult to identify from the measurements because of large inter-annual variability. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Jonson, J. E. Simpson, D. Fagerli, H. Solberg, S. Can we explain the trends in European ozone levels? |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Ozone levels in Europe are changing. Emissions of ozone precursors from Europe (NO x , CO and non-methane hydrocarbons) have been substantially reduced over the last 10?15 years, but changes in ozone levels can not be explained by changes in European emissions alone. In order to explain the European trends in ozone since 1990 the EMEP regional photochemistry model has been run for the the years 1990 and 1995?2002. The EMEP model is a regional model centered over Europe but the model domain also includes most of the North Atlantic and the polar region. Climatological ozone data are used as initial and lateral boundary concentrations. Model results are compared to measurements over this timespan of 12 years. Possible causes for the measured trends in European surface ozone have been investigated using model sensitivity runs perturbing emissions and lateral boundary concentrations. The observed ozone trends at many European sites are only partially reproduced by global or regional photochemistry models, and possible reasons for this are discussed. The increase in winter ozone partially and the decrease in the magnitude of high ozone episodes is attributed to the decrease in ozone precursor emissions since 1990 by the model. Furthermore, the model calculations indicate that the emission reductions has resulted in a marked decrease in summer ozone in major parts of Europe, and in particular in Germany. Such a trend in summer ozone is likely to be difficult to identify from the measurements because of large inter-annual variability. |
author2 |
Norwegian Meteorological Institute Oslo (MET) Norwegian Institute for Air Research (NILU) |
format |
Article in Journal/Newspaper |
author |
Jonson, J. E. Simpson, D. Fagerli, H. Solberg, S. |
author_facet |
Jonson, J. E. Simpson, D. Fagerli, H. Solberg, S. |
author_sort |
Jonson, J. E. |
title |
Can we explain the trends in European ozone levels? |
title_short |
Can we explain the trends in European ozone levels? |
title_full |
Can we explain the trends in European ozone levels? |
title_fullStr |
Can we explain the trends in European ozone levels? |
title_full_unstemmed |
Can we explain the trends in European ozone levels? |
title_sort |
can we explain the trends in european ozone levels? |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00301696 https://hal.science/hal-00301696/document https://hal.science/hal-00301696/file/acpd-5-5957-2005.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00301696 Atmospheric Chemistry and Physics Discussions, 2005, 5 (4), pp.5957-5985 |
op_relation |
hal-00301696 https://hal.science/hal-00301696 https://hal.science/hal-00301696/document https://hal.science/hal-00301696/file/acpd-5-5957-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782337547373903872 |