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| Titel |
Diurnal temperature range over Europe between 1950 and 2005 |
| VerfasserIn |
K. Makowski, M. Wild, A. Ohmura |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 21 ; Nr. 8, no. 21 (2008-11-13), S.6483-6498 |
| Datensatznummer |
250006442
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| Publikation (Nr.) |
 copernicus.org/acp-8-6483-2008.pdf |
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| Zusammenfassung |
| It has been widely accepted that diurnal temperature range (DTR) decreased
on a global scale during the second half of the twentieth century. Here we
show however, that the long-term trend of annual DTR has reversed from a
decrease to an increase during the 1970s in Western Europe and during the
1980s in Eastern Europe. The analysis is based on the high-quality dataset
of the European Climate Assessment and Dataset Project, from which we
selected approximately 200 stations covering the area bordered by Iceland,
Algeria, Turkey and Russia for the period 1950 to 2005. We investigate
national and regional annual means as well as the pan-European mean with
respect to trends and reversal periods. 17 of the 24 investigated regions
including the pan-European mean show a statistical significant increase of
DTR since 1990 at the latest. Of the remaining 7 regions, two show a
non-significant increase, three a significant decrease and two no significant
trend. Changes in DTR are affected by both surface shortwave and longwave
radiation, the former of which has undergone a change from dimming to
brightening in the period considered. Consequently, we discuss the
connections between DTR, shortwave radiation and sulfur emissions which are
thought to be amongst the most important factors influencing the incoming
solar radiation through the primary and secondary aerosol effect. We find
reasonable agreement between trends in SO2 emissions, radiation and DTR
in areas affected by high pollution. Consequently, we conclude that the
trends in DTR could be mostly determined by changes in emissions and the
associated changes in incoming solar radiation. |
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