Surface Synoptic Circulation and Daily Precipitation in Catalonia |
| |
Authors: | C Serra G Fernández Mills M C Periago X Lana |
| |
Institution: | (1) Department de Física i Enginyeria Nuclear, ETSEIB, Universitat Politècnica de Catalunya, Barcelona, Spain, ES |
| |
Abstract: | Summary Catalonian daily precipitation patterns were obtained by means of S-mode Principal Component Analysis (PCA) applied to subsets
built up according to synoptic surface airflow. Daily data from November to April 1990–1994 from 45 raingauge sites in Catalonia
without missing data were used. Eight circulation classes for days in this period were considered. A Precipitation Activity
Index (PAI) was calculated for each station and class, leading to the determination of the highest activity regions for each
subset. In addition, we determined which circulation type produced most precipitation at each station of the network. Separate
PCAs were performed for each of the eight classes considered and the first four Varimax rotated solutions were interpreted
for each circulation type. The physical meaning of the rest of the factors were omitted as they were associated with local
behaviour. Finally, some concluding remarks on the cyclogenic properties of the Western Mediterranean Basin and the diversity
of the extracted patterns are presented and supported by the authors experience in forecasting in Catalonia.
Received February, 11, 1997 Revised May 23, 1997 |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|