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Title: Six-month ground-based water vapour raman lidar measurements over Athens, Greece and system validation
Authors: Papayannis, Alexandros D. 
Tsaknakis, Georgios 
Mamouri, Rodanthi-Elisavet 
Major Field of Science: Engineering and Technology
Keywords: Algorithms;Water vapor;Backscattering;Optical radar
Issue Date: 2007
Source: Journal of Optoelectronics and Advanced Materials, 2007, vol. 9, no. 11, pp. 3546-3548
Volume: 9
Issue: 11
Start page: 3546
End page: 3548
Journal: Journal of Optoelectronics and Advanced Materials 
Abstract: Water vapour is one of the most important greenhouse gases, since it causes about two third of the natural greenhouse effect of the Earth's atmosphere. To improve the understanding of the role of the water vapour in the atmosphere, extensive water vapour profiles with high spatio-temporal resolution are therefore necessary. A ground-based Raman lidar system is used to perform water vapour measurements in Athens, Greece (37.9°N, 23.6°E, 200 m asi.). Water vapour mixing ratio measurements are retrieved from simultaneous inelastic H2O and N2 Raman backscatter lidar signals at 387 nm (from atmospheric N2) and 407 nm (from H2O). Systematic measurements are performed since September 2006. A new algorithm is used to retrieve water vapour vertical profiles in the lower troposphere (0.5-5 km range height asl.). The lidar observations are complemented with radiosonde measurements. Radiosonde data are obtained daily (at 00:00 UTC and 12:00 UTC) from the Hellenic Meteorological Service (HMS) of Greece which operates a meteorological station at the "Hellinikon" airport (37. 54° N, 23.44° E, 15m asl) in Athens, Greece. First results of the systematic intercomparison between water vapour profiles derived simultaneously by the Raman lidar and by radiosondes are presented and discussed.
ISSN: 1454-4164
Type: Article
Affiliation: National Technical University Of Athens 
Affiliation : Aristotle University of Thessaloniki 
Appears in Collections:Άρθρα/Articles

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