VERBI VEnice Research BIbliography
VERBI VEnice Research BIbliography |
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Camuffo, D., & Sturaro, G. (2002). Venice in the context of european-scale climate changes with special reference to the 'acqua alta' phenomenon. Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results, I, 177–191.
Added by: Dott. Alessandro Meggiato (28/05/2014 16:19:42) |
| Tipo di Risorsa: Articolo di Rivista Chiave di citazione BibTeX: Camuffo2002 Invia la risorsa per email ad un amico View all bibliographic details  |
Categorie: General Keywords: cambiamenti climatici, extend abstract corila, processi ambientali - Environmental Processes Creatori: Camuffo, Sturaro Collezione: Scientific Research and Safeguarding of Venice, Corila Research Program 2001 Results |
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| Abstract |
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Due to its geographical position, and because it was built at sea level, Venice is extremely sensitive to climate changes and, in the future, risks being submerged as a consequence of the expansion of oceanic water in response to global warming. The climate changes of the Venetian area are investigated by making use of eight highly reliable European series, covering a very long time interval, nearly three centuries. These are daily pressure and temperature series derived from the EC funded project IMPROVE: Padova (It., 1725-present), Milan (It., 1763-present), Central Belgium (Be., 1767-present, temperature only), Uppsala (Se., 1722-present), Stockholm (Se., 1756-present), San Fernando/Cadiz (Es., 1776-present), St Petersburg, Russia (1743-present) and Central England (UK., 1772-present). An important aspect in the analysis is the high (daily) resolution of the series, which allows more insight into past variability by looking at the frequency of extreme events. An analysis of the distribution of extreme events across Europe has shown that recent warming is characterised by an increase in frequency of the hottest days, in association with a decrease in frequency of the coldest. A key problem for Venice is the increasing frequency of sea surges flooding the city (locally named acqua alta) that has reached an unsustainable level. After careful examination of both proxy documentary and instrumental data, it has been possible to reconstruct the extreme weather conditions and natural hazards which have taken place in the last two millennia, with particular reference to surges. An accurate series of the flood surges has been obtained combining instrumental observations (1872-2000) with documentary data for the previous period. The period of minimum solar activity of Spörer (1416-1534) was anomalous for surges. Not only have meteorologically perturbed periods been identified, but also the effects of the accelerated subsidence of the city and of certain works undertaken in the lagoon that varied the exchanges between the sea and the lagoon. The impact of subsidence and of the modified dynamical exchanges of the lagoon on the change in flooding frequency have been established. During the instrumental period the tide gauge measured a 31-cm rise. The frequency of surges has dramatically increased since the 1960s, reaching about two flooding events per year, the greatest value since 792 AD. Added by: Dott. Alessandro Meggiato |