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Convective Rainfall Rate improvements

This workshop discusses improvements in convective rainfall rate estimation, focusing on hourly precipitation accumulations and radar calibration techniques. Topics include new calibration methods, future work on lightning activity, and advantages of integrating lightning information.

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Convective Rainfall Rate improvements

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  1. Convective Rainfall Rate improvements 2nd Convection Workshop Landshut, Germany, 8-10 October 2009 Cecilia Marcos Antonio Rodríguez

  2. Hourly Accumulations Precipitation accumulated in the last hour (region center time): • Where: • Ai: hourly accumulation, in mm, corresponding to the time i. • T: time interval between scenes in hours (T= 0.25) • Ф: part of T that corresponds to the time that takes the satellite to reach the centre of the region. • Ii: Instantaneous rainfall rate for each scene in mm/h One hour accumulated CRR One hour accumulated Radar

  3. New Calibration Radar (PPI) CRR rain rates are, most of the times, lower than radar ones New calibration: provides more weight to the higher rates CRR calibration 2008 CRR calibration 2009

  4. Future work: lightning activity Radar (PPI) Objective: to obtain more information about convection through the electrical activity Problem: lightning activity does not always match the precipitation pattern Advantage: pattern improved, mainly in 2D calibration CRR without lightning information CRR with lightning information

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