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Proceedings Paper

Backscatter lidar observation of the aerosol stratification over Rhine Valley during a heat wave in September 1999
Author(s): Max Frioud; Valentin Mitev; Renaud Matthey; Ch. Haoeberli; H. Richner; Richard Werner; S. Vogt
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Paper Abstract

A backscatter lidar study of the aerosol stratification in PBL over the Rhine valley is presented in this work. The observations have been made from 6 till 14 September 1999 in the Special Observation Period of the Mesoscale Alpine Program at the site of Trubbach, Switzerland [47°04' N, 9°28' E, 490 m above sea level (asl)]. The lidar was operated alongside with a wind-temperature radar, a set of surface meteorological stations and radiosonde observations. The atmospheric conditions for the presented measurements are especially favorable for development of convective PBL. A daily series of range-corrected lidar signal and its gradient are given, showing the diurnal cycle of aerosol layers development in the PBL and lower troposphere over the valley. Averaged altitude distributions of the aerosol backscatter coefficient and the lidar signal gradient are presented and discussed. The results show that the aerosol distribution below the surrounding mountain peaks (approximately 2200 - 2400 m asl) have the diurnal pattern as following from the thermal wind cycle and the temperature inversions in the valley and is characterized by a highly dynamic aerosol stratification. Above this level, we observe a diurnally less variable stratification till altitudes of the highest Alpine peaks (approximately 4500 - 5000 m asl).

Paper Details

Date Published: 18 April 2003
PDF: 12 pages
Proc. SPIE 4882, Remote Sensing of Clouds and the Atmosphere VII, (18 April 2003); doi: 10.1117/12.462432
Show Author Affiliations
Max Frioud, Observatory of Neuchatel (Switzerland)
Valentin Mitev, Observatory of Neuchatel (Switzerland)
Renaud Matthey, Observatory of Neuchatel (Switzerland)
Ch. Haoeberli, MeteoSwiss (Switzerland)
H. Richner, Swiss Federal Institute of Technology (Switzerland)
Richard Werner, Umweltinstitut des Landes Vorarlberg (Austria)
S. Vogt, Univ. Karlsruhe (Germany)

Published in SPIE Proceedings Vol. 4882:
Remote Sensing of Clouds and the Atmosphere VII
Klaus P. Schaefer; Olga Lado-Bordowsky; Adolfo Comeron; Richard H. Picard, Editor(s)

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