Assessing uncertainty in radar measurements on simplified meteorological scenarios

L. Molini (1) , A. Parodi (1) , N. Rebora (1) , F. Siccardi (1)

1 CIMA

A three-dimensional radar simulator model (RSM) developed by Haase (1998) is coupled with the nonhydrostatic mesoscale weather forecast model Lokal-Modell (LM). The radar simulator is able to model reflectivity measurements by using the following meteorological fields, generated by Lokal Modell, as inputs: temperature, pressure, water vapour content, cloud water content, cloud ice content, rain sedimentation flux and snow sedimentation flux. This work focuses on the assessment of some uncertainty sources associated with radar measurements:

absorption by the atmospheric gases, e.g., molecular oxygen, water vapour, and nitrogen;

attenuation due to the presence of a highly reflecting structure between the radar and a "target structure".

RSM results for a simplified meteorological scenario, consisting of a humid updraft on a flat surface and four cells placed around it, are presented.

Domaines: Sciences de la Terre

L. Molini, A. Parodi, N. Rebora, F. Siccardi. Assessing uncertainty in radar measurements on simplified meteorological scenarios. Advances in Geosciences, 2006, 7, pp.141-146. ⟨hal-00296868⟩