A combined Rayleigh-Raman lidar for measurements of tropospheric water vapour and aerosol profiles

Rizi, V. and Iarlori, M. and Di Carlo, P. and Visconti, G. and Cinque, G. (2000) A combined Rayleigh-Raman lidar for measurements of tropospheric water vapour and aerosol profiles. Il nuovo cimento C, 23 C (1). pp. 53-64. ISSN 1826-9885

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The receiver of the Differential Absorption Lidar system of the University of L’Aquila (Italy) has been upgraded for the detection of Raman scattering from nitrogen and water vapour induced by XeCl and XeF excimer laser lines. In this configuration, only the XeF source is activated, so we can measure the tropospheric water vapour mixing ratio profiles with a height resolution of 300 m and 10 min in time. The lower limit sensitivity for the mixing ratio of water vapour is about 2 Q1024 and the precision ranges between 5% at 2 km and 50% at 9 km. The aerosol back-scattering ratio profiles can be measured with the same altitude and time resolution up to the lower stratosphere, the relative error is below 5% in the troposphere and about 30% at the highest altitudes. Comparisons with coincident PTU balloon-sondes show that the performances of the system in measuring the tropospheric water vapour are well calibrated for studying the water vapour evolution and cloud formation in the troposphere.

Item Type: Article
Uncontrolled Keywords: Meteorology; Water in the atmosphere (humidity, clouds, evaporation, precipitation); Instrumentation and techniques for geophysical research
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia
Depositing User: Marina Spanti
Date Deposited: 28 Jan 2020 17:28
Last Modified: 28 Jan 2020 17:28
URI: http://eprints.bice.rm.cnr.it/id/eprint/13784

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