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| Titel |
Schneefernerhaus as a mountain research station for clouds and turbulence |
| VerfasserIn |
S. Risius, H. Xu, F. Di Lorenzo, H. Xi, H. Siebert, R. A. Shaw, E. Bodenschatz |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 8 ; Nr. 8, no. 8 (2015-08-13), S.3209-3218 |
| Datensatznummer |
250116525
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| Publikation (Nr.) |
 copernicus.org/amt-8-3209-2015.pdf |
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| Zusammenfassung |
| Cloud measurements are usually carried out with airborne campaigns, which are
expensive and are limited by temporal duration and weather conditions.
Ground-based measurements at high-altitude research stations therefore play a
complementary role in cloud study. Using the meteorological data (wind speed,
direction, temperature, humidity, visibility, etc.) collected by the German
Weather Service (DWD) from 2000 to 2012 and turbulence measurements recorded
by multiple ultrasonic sensors (sampled at 10 Hz) in 2010, we show
that the Umweltforschungsstation Schneefernerhaus (UFS) located just below
the peak of Zugspitze in the German Alps, at a height of 2650 m, is a
well-suited station for cloud–turbulence research. The wind at UFS is
dominantly in the east–west direction and nearly horizontal. During the
summertime (July and August) the UFS is immersed in warm clouds about 25 %
of the time. The clouds are either from convection originating in the valley
in the east, or associated with synoptic-scale weather systems typically
advected from the west. Air turbulence, as measured from the second- and
third-order velocity structure functions that exhibit well-developed inertial
ranges, possesses Taylor microscale Reynolds numbers up to 104, with the
most probable value at ~ 3000. In spite of the complex topography, the
turbulence appears to be nearly as isotropic as many laboratory flows when
evaluated on the "Lumley triangle". |
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