| << | Convection, Turbulence and Precipitation | >> |
Abstract
In this work, using the combination of an X-band high time and spatial resolution (30 seconds and 60 meters in range up to 20 kilometers) local area weather radar, a k-band vertically looking Micro Rain Radar and a network of rain gages and optical disdrometers, we study the temporal and spatial and vertical heterogeneity of rain and its corresponding drop size distribution within precipitating systems. Then, usinged simple classification criteria (based on rain intensity, trend, time variability, etc...), we define separate rain regimes for which we can derive specific Z-R relationships. Applying these relationships to the X band reflectivity measurements allows us to improve rain rate restitutions over the size of a small urban basin after adequate correction for the attenuation effects. Furthermore, we will also investigate the effect of the vertical variability of the drop size distribution profiles and its impact on the rain estimate on the ground.