Bordi, I. and Sutera, A. (2002) An analysis of drought in Italy in the last fifty years. Il nuovo cimento C, 25 (2). pp. 185-206. ISSN 1826-9885
|
Text
ncc8715.pdf - Published Version Download (1MB) | Preview |
Abstract
In this paper the authors present a study of drought occurrence over Italy. The NCEP/NCAR reanalysis precipitation rates covering the period from 1948 to 2000 were used to assess drought over the area in question. The analysis is based on the Standardized Precipitation Index (SPI), which has been proposed asan indicator of drought occurrence. The index relieson the knowledge of the precipitation field only, therefore, it may be readily computed from the data. A Principal Component Analysis (PCA) of the resulting fields reveals a downward trend for the index over the area considered. It implies that drought conditions have been in the recent past more frequent and extended, within the region, over larger areas. Moreover, the temporal behaviours of the principal component scores show few long-term periodicities.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Climatology ; Water in the atmosphere (humidity, clouds, evaporation, precipitation) |
| Subjects: | 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551.6 Climatologia e tempo atmosferico (Classificare qui i lo studio dei Cambiamenti climatici) |
| Depositing User: | Marina Spanti |
| Date Deposited: | 12 Mar 2020 10:50 |
| Last Modified: | 12 Mar 2020 10:50 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/14788 |
Actions (login required)
 |
View Item |
