Radar Estimation of Intense Rainfall Rates through Adaptive Calibration of the Z-R Relation
AbstractRainfall intensity estimation from weather radar is still significantly uncertain, due to local anomalies, radar beam attenuation, inappropriate calibration of the radar reflectivity factor (Z) to rainfall rate (R) relationship, and sampling errors. The aim of this work is to revise the use of the power-law equation commonly adopted to relate radar reflectivity and rainfall rate to increase the estimation quality in the presence of intense rainfall rates. We introduce a quasi real-time procedure for an adaptive in space and time estimation of the Z-R relation. The procedure is applied in a comprehensive case study, which includes 16 severe rainfall events in the north-west of Italy. The study demonstrates that the technique outperforms the classical estimation methods for most of the analysed events. The determination coefficient improves by up to 30% and the bias values for stratiform events decreases by up to 80% of the values obtained with the classical, non-adaptive, Z-R relations. The proposed procedure therefore shows significant potential for operational uses. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Libertino, A.; Allamano, P.; Claps, P.; Cremonini, R.; Laio, F. Radar Estimation of Intense Rainfall Rates through Adaptive Calibration of the Z-R Relation. Atmosphere 2015, 6, 1559-1577.
Libertino A, Allamano P, Claps P, Cremonini R, Laio F. Radar Estimation of Intense Rainfall Rates through Adaptive Calibration of the Z-R Relation. Atmosphere. 2015; 6(10):1559-1577.Chicago/Turabian Style
Libertino, Andrea; Allamano, Paola; Claps, Pierluigi; Cremonini, Roberto; Laio, Francesco. 2015. "Radar Estimation of Intense Rainfall Rates through Adaptive Calibration of the Z-R Relation." Atmosphere 6, no. 10: 1559-1577.