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| Titel |
On the regional climatic impact of contrails: microphysical and radiative properties of contrails and natural cirrus clouds |
| VerfasserIn |
B. Strauss, R. Meerkoetter, B. Wissinger, P. Wendling, M. Hess |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 15, no. 11 ; Nr. 15, no. 11, S.1457-1467 |
| Datensatznummer |
250013009
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| Publikation (Nr.) |
 copernicus.org/angeo-15-1457-1997.pdf |
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| Zusammenfassung |
| The impact of contrail-induced cirrus clouds
on regional climate is estimated for mean atmospheric conditions of southern
Germany in the months of July and October. This is done by use of a regionalized
one-dimensional radiative convective model (RCM). The influence of an increased
ice cloud cover is studied by comparing RCM results representing climatological
values with a modified case. In order to study the sensitivity of this effect on
the radiative characteristics of the ice cloud, two types of additional ice
clouds were modelled: cirrus and contrails, the latter cloud type containing a
higher number of smaller and less of the larger cloud particles. Ice cloud
parameters are calculated on the basis of a particle size distribution which
covers the range from 2 to 2000 µm, taking into consideration recent
measurements which show a remarkable amount of particles smaller than 20 µm. It
turns out that a 10% increase in ice cloud cover leads to a surface temperature
increase in the order of 1K, ranging from 1.1 to 1.2K in July and from 0.8 to
0.9K in October depending on the radiative characteristics of the
air-traffic-induced ice clouds. Modelling the current contrail cloud cover which
is near 0.5% over Europe yields a surface temperature increase in the order of
0.05K. |
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