Tropospheric water vapour and relative humidity profiles from lidar and microwave radiometry
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AutorNavas-Guzmán, Francisco; Fernández-Gálvez, Jesús; Granados-Muñoz, María José; Guerrero-Rascado, Juan Luis; Bravo-Aranda, Juan Antonio; Alados-Arboledas, Lucas
Copernicus Publications; European Geosciences Union (EGU)
Raman lidarOptical propertiesCalibrationOptical measurementsEvaporationRadiometers
Navas-Guzmán, F.; et al. Tropospheric water vapour and relative humidity profiles from lidar and microwave radiometry. Atmospheric Measurement Techniques, 7: 1201-1211 (2014). [http://hdl.handle.net/10481/34972]
PatrocinadorThis work was supported by the Andalusian Regional Government through projects P12-RNM-2409 and P10-RNM-6299, by the Spanish Ministry of Science and Technology through projects CGL2010-18782, CSD2007-00067, CGL2011-13580-E/CLI and CGL2011-16124-E; and by the EU through the ACTRIS project (EU INFRA-2010-1.1.16-262254).
In this paper, we outline an iterative method to calibrate the water vapour mixing ratio profiles retrieved from Raman lidar measurements. Simultaneous and co-located radiosonde data are used for this purpose and the calibration results obtained during a radiosonde campaign in summer and autumn 2011 are presented. The water vapour profiles measured during night-time by the Raman lidar and radiosondes are compared and the differences between the methodologies are discussed. Then, a new approach to obtain relative humidity profiles by combination of simultaneous profiles of temperature (retrieved from a microwave radiometer) and water vapour mixing ratio (from a Raman lidar) is addressed. In the last part of this work, a statistical analysis of water vapour mixing ratio and relative humidity profiles obtained during 1 year of simultaneous measurements is presented.