Articles | Volume 14, issue 12
Atmos. Meas. Tech., 14, 7525–7544, 2021
https://doi.org/10.5194/amt-14-7525-2021
Atmos. Meas. Tech., 14, 7525–7544, 2021
https://doi.org/10.5194/amt-14-7525-2021

Research article 03 Dec 2021

Research article | 03 Dec 2021

Mitigation of bias sources for atmospheric temperature and humidity in the mobile Raman Weather and Aerosol Lidar (WALI)

Julien Totems et al.

Data sets

Observations d’altitude (Radio sondages) Météo-France https://donneespubliques.meteofrance.fr/?fond=produit&id_produit=97&id_rubrique=33

ERA5 hourly data on pressure levels from 1979 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.bd0915c6

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Short summary
We describe in detail the design and calibration of the new Raman channels for the WALI system, going over the important sources of bias and uncertainty on retrieved temperature profiles. For the first time, their impact is investigated using horizontal shots in a homogenous atmosphere: the magnitude of the highlighted biases can be much larger than the targeted absolute accuracy of 1° C. Actual measurement errors are quantified using radiosoundings launched close to the lidar site.