We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Far-field synoptic wind effects extraction from sea-level oscillations: The Venice lagoon case study.
- Authors
Falanga, Mariarosaria; Enza, De Lauro; Salvatore, De Martino
- Abstract
We analyze the sea-level oscillations at eight mareographic stations of the ISPRA network located in the Venetianlagoon considering four years from 2008 to 2011. The aim is to study the acqua alta phenomenon (i.e. theaverage increase in flooding levels higher than 79 cm), on different time scales by using a nonlinear method(Independent Component Analysis). We show that it is possible to extract from the water-level oscillations, onthe time scale of the year, a long period component, which has a high correlation with the wind recordings(>0.8). Three tidal constituents are extracted by ICA including astronomical and meteorological effects. Inparticular, a long period component, peaked at two months, is ascribed to the wind effect on synoptic scale;indeed it shows a high correlation with the wind stress signal. According to the ICA model, that component islinearly superimposed on the extracted astronomical tides. These results allow us to estimate the tide superelevationdue to the wind stress at each station and so to improve the forecasting model of acqua alta, e.g., byintroducing the proper wind effect correction at each station.
- Subjects
INDEPENDENT component analysis; LAGOONS; OSCILLATIONS; STORM surges; WIND forecasting; CASE studies
- Publication
Geophysical Research Abstracts, 2019, Vol 21, p1
- ISSN
1029-7006
- Publication type
Article