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- Title
Water vapour profiles from Raman lidar automatically calibrated by microwave radiometer data during HOPE.
- Authors
Foth, A.; Baars, H.; Di Girolamo, P.; Pospichal, B.
- Abstract
In this paper, we present a method to derive water vapour profiles from Raman lidar measurements calibrated by the integrated water vapour (IWV) from a collocated microwave radiometer during the intense observation campaign HOPE in the frame of the HD(CP)² initiative. The simultaneous observation of a microwave radiometer and a Raman lidar allowed an operational and continuous measurement of water vapour profiles also during cloudy conditions. The calibration method provides results in a good agreement with conventional methods based on radiosondes. The calibration factor derived from the proposed IWV method is very stable with a relative uncertainty of 6 %. This stability allows to calibrate the lidar even in the presence of clouds using the calibration factor determined during the closest in time clear sky interval. Based on the application of this approach, it is possible to retrieve water vapour profiles during all non-precipitating conditions. A statistical analysis shows a good agreement between the lidar measurements and collocated radiosondes. The relative biases amount to less than 6.7% below 2 km.
- Subjects
ATMOSPHERIC water vapor; RAMAN spectroscopy; CALIBRATION; MICROWAVE radiometers; CLOUDS
- Publication
Atmospheric Chemistry & Physics Discussions, 2015, Vol 15, Issue 5, p6567
- ISSN
1680-7367
- Publication type
Article
- DOI
10.5194/acpd-15-6567-2015