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Interannual variation and trends in air pollution over Europe due to climate variability during 1958–2001 simulated with a regional CTM coupled to the ERA40 reanalysis
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
2007 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 59, 77-98 p.Article in journal (Refereed) Published
Abstract [en]

A three-dimensional Chemistry Transport Model was used to study the meteorologically induced interannual variability and trends in deposition of sulphur and nitrogen as well as concentrations of surface ozone (O3), nitrogen dioxide (NO2) and particulate matter (PM) and its constituents over Europe during 1958–2001. The model was coupled to the meteorological reanalysis ERA40, produced at the European Centre for Medium-range Weather Forecasts. Emissions and boundary conditions of chemical compounds and PM were kept constant at present levels.

The average European interannual variation, due to meteorological variability, ranges from 3% for O3, 5%for NO2, 9% for PM, 6–9% for dry deposition, to about 20% for wet deposition of sulphur and nitrogen. For the period 1979–2001 the trend in ozone, due to climate variability is increasing in central and southwestern Europe and decreasing in northeastern Europe, the trend in NO2 is approximately opposite. The trend in PM is positive in eastern Europe. There are negative trends in wet deposition in southwestern and central Europe and positive trends in dry deposition overall. A bias in ERA40 precipitation could be partly responsible for the trends. The variation and trends need to be considered when interpreting measurements and designing measurement campaigns.

Place, publisher, year, edition, pages
Stockholm: Tellus , 2007. Vol. 59, 77-98 p.
National Category
Natural Sciences Meteorology and Atmospheric Sciences Meteorology and Atmospheric Sciences
Research subject
Applied Environmental Science
Identifiers
URN: urn:nbn:se:su:diva-25946DOI: 10.1111/j.1600-0889.2006.00196.xISI: 000243681100008OAI: oai:DiVA.org:su-25946DiVA: diva2:201008
Available from: 2009-03-02 Created: 2009-03-02 Last updated: 2017-12-13Bibliographically approved
In thesis
1. Air Pollution Dependency on Climate Variability and Source Region: Past, Current and Future Air Pollution Scenarios over Europe
Open this publication in new window or tab >>Air Pollution Dependency on Climate Variability and Source Region: Past, Current and Future Air Pollution Scenarios over Europe
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The main objectives of this thesis were to investigate the dependency of European air pollution on climate variability and emission source region. Calculations with a chemistry transport model (CTM) were conducted to investigate the influence of climate variability. The CTM was forced by both simulated past (a re-analysis spanning 1958-2001) and future (a climate simulation spanning 1961-2100) meteorology keeping anthropogenic emissions constant. To investigate the influence of emission source region emissions were varied in western, eastern and northern Europe in seven-year (1997-2003) simulations.

The main conclusions in this thesis are

§         There is variability in air pollution due to climate variability on time scales from year to year to decades and long-term trends. Hence, what is measured now will not be valid in a decade, or even next year.

§         Interannual variability in air pollution due to climate variability is greater than interannual variability in anthropogenic emissions.

§         The extreme conditions in 2003, resulting in elevated surface O3 concentrations, could be an indication on what we can expect in the future.

§         The trend in surface O3 over the past due to climate change is similar to the projected trend due to future climate change: increasing in south-western and central Europe and decreasing in north-eastern Europe.

§         Changes in isoprene emissions and dry deposition dependency on soil moisture are of importance for changes in surface O3 in central and southern Europe. It is vital to include these processes, especially the latter in climate change effect studies of surface O3.

§         This work indicates that it is of greater importance for health benefits of the European population to reduce primary PM emissions than precursors of secondary inorganic aerosol under the assumption of higher relative risk for primary PM. This is especially the case in western Europe.

Place, publisher, year, edition, pages
Stockholm: Department of Applied Environmental Science (ITM), Stockholm University, 2009. 55 p.
Keyword
Acidification, Air Pollution, Climate Change, Europe, Numerical Model, Emission, Eutrophication, Key region, Nitrogen Dioxide, Particulate Matter, PM, Source region, Surface Ozone, Tropospheric Ozone
National Category
Earth and Related Environmental Sciences
Research subject
Applied Environmental Science
Identifiers
urn:nbn:se:su:diva-25947 (URN)978-91-7155-828-2 (ISBN)
Public defence
2009-04-03, William Olssonsalen, Svante Arrhenius väg 8A, Geovetenskapens hus, 13:00 (English)
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Available from: 2009-03-12 Created: 2009-03-02 Last updated: 2009-03-23Bibliographically approved

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