| Autor: |
Peshev, Zahary Y., Deleva, Atanaska D., Dreischuh, Tanja N., Stoyanov, Dimitar V. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 1/21/2010, Vol. 1203 Issue 1, p1108-1113, 6p, 1 Color Photograph, 5 Graphs |
| Abstrakt: |
Results of lidar observations on the dynamics of atmospheric layers over the ridge and northeast slope of Vitosha Mountain situated close to Sofia, Bulgaria, are reported and compared with results for layers over surrounding plain and urban zones. Measurements are carried out at 1064 nm wavelength with a lidar range resolution of 15 m, by using one of the aerosol channels of a combined Raman-aerosol lidar based on a powerful Nd:YAG laser. Two cases of distinctly different weather conditions are studied. The mountainous area, situated from 6 km to 12 km away from the lidar station, is scanned reiteratively within 7°–9° slope-angle range. Multiple series of lidar profiles are registered with average time of 2–5 s. Lidar signals are then range corrected and processed statistically. Normalized standard deviation is used as a characteristic of the atmospheric dynamics. The spatial-temporal evolution of atmospheric density fluctuations is shown on colormap plots. Intensive air dynamics over the mountain is revealed, exceeding considerably the one over the plain zone. Peculiarities of the dynamics in the investigated atmospheric domains are discussed. Results obtained show that Vitosha Mountain strongly affects variations of the atmospheric density and stability over large areas. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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