Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Assessment of Trends in Extreme Precipitation Events: A Case Study in Piedmont (North-West Italy) |
| Abstract | Intensification of heavy precipitation as discussed in climate change studies has become a public concern, but it has not yet been examined well with observed data, particularly with data at short temporal scale like hourly and sub-hourly data. The original data set was retrieved by using an automated recovery approach. We chose four stations, namely, Vercelli (since 1927), Bra (since 1933), Lombriasco (since 1939) and Pallanza (since 1950) which are located in the northwest of Italy. We assessed trends for durations from 5 min to 12 h in seasonal, annual maxima, and number and magnitude of exceedances of the 95th percentile. Split sample tests have been undertaken to assess differences in quantile estimates derived using a Generalised Pareto distribution fitted to Peaks-Over-Threshold series. The statistical analyses performed include parametric and non-parametric tests. Mostly, we cannot reject the trend stationarity hypothesis. There is no uniform trend on extreme events in the whole area. However, some trends are evident and significant for specific stations and specific indices. Specifically, it is obvious that extreme rainfall events have risen in the last 20 years only for short durations. |
| Source | Water resources management 29 (1), pp. 63–80 |
| Keywords | TrendStationaritySub-hourly precipitationExtreme eventsPeak-over-threshold |
| Journal | Water resources management |
| Editor | Reidel, Boston, Paesi Bassi |
| Year | 2015 |
| Type | Articolo in rivista |
| DOI | 10.1007/s11269-014-0826-5 |
| Authors | Saidi, Helmi; Ciampittiello, Marzia; Dresti, Claudia; Ghiglieri, Giorgio |
| Text | 328723 2015 10.1007/s11269 014 0826 5 ISI Web of Science WOS 000346417700004 Trend Stationarity Sub hourly precipitation Extreme events Peak over threshold Assessment of Trends in Extreme Precipitation Events A Case Study in Piedmont North West Italy Saidi, Helmi; Ciampittiello, Marzia; Dresti, Claudia; Ghiglieri, Giorgio Consiglio Nazionale delle Ricerche CNR ; University of Cagliari; University of Sassari Intensification of heavy precipitation as discussed in climate change studies has become a public concern, but it has not yet been examined well with observed data, particularly with data at short temporal scale like hourly and sub hourly data. The original data set was retrieved by using an automated recovery approach. We chose four stations, namely, Vercelli since 1927 , Bra since 1933 , Lombriasco since 1939 and Pallanza since 1950 which are located in the northwest of Italy. We assessed trends for durations from 5 min to 12 h in seasonal, annual maxima, and number and magnitude of exceedances of the 95th percentile. Split sample tests have been undertaken to assess differences in quantile estimates derived using a Generalised Pareto distribution fitted to Peaks Over Threshold series. The statistical analyses performed include parametric and non parametric tests. Mostly, we cannot reject the trend stationarity hypothesis. There is no uniform trend on extreme events in the whole area. However, some trends are evident and significant for specific stations and specific indices. Specifically, it is obvious that extreme rainfall events have risen in the last 20 years only for short durations. 29 Published version Assessment of Trends in Extreme Precipitation Events Assessment_of_Trend_in_Extreme_Precipitation_Events_Saidi_et_al_2015.pdf Articolo in rivista Reidel 0920 4741 Water resources management Water resources management Water resour. manag. claudia.dresti DRESTI CLAUDIA helmi.saidi SAIDI HELMI marzia.ciampittiello CIAMPITTIELLO MARZIA |