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A Raman lidar at La Reunion (20.8° S, 55.5° E) for monitoring water vapour and cirrus distributions in the subtropical upper troposphere: preliminary analyses and description of a future system

Abstract : Abstract. A ground-based Rayleigh lidar has provided continuous observations of tropospheric water vapour profiles and cirrus cloud using a preliminary Raman channels setup on an existing Rayleigh lidar above La Reunion over the period 2002–2005. With this instrument, we performed a first measurement campaign of 350 independent water vapour profiles. A statistical study of the distribution of water vapour profiles is presented and some investigations concerning the calibration are discussed. Analysis regarding the cirrus clouds is presented and a classification has been performed showing 3 distinct classes. Based on these results, the characteristics and the design of a future lidar system, to be implemented at the new Reunion Island altitude observatory (2200 m) for long-term monitoring, is presented and numerical simulations of system performance have been realised to compare both instruments.
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https://hal.univ-reunion.fr/hal-03695907
Contributor : Béatrice Morel Connect in order to contact the contributor
Submitted on : Wednesday, June 15, 2022 - 1:00:00 PM
Last modification on : Thursday, June 16, 2022 - 3:36:03 AM

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C. Hoareau, P. Keckhut, J.-L. Baray, L. Robert, Y. Courcoux, et al.. A Raman lidar at La Reunion (20.8° S, 55.5° E) for monitoring water vapour and cirrus distributions in the subtropical upper troposphere: preliminary analyses and description of a future system. Atmospheric Measurement Techniques, European Geosciences Union, 2012, 5 (6), pp.1333-1348. ⟨10.5194/amt-5-1333-2012⟩. ⟨hal-03695907⟩

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