Abstract
Abstract. In this study, we investigate the oscillations of relative sea level through the analysis of tide gauge records about 10-year long collected in the Gulfs of Pozzuoli and Napoli (Southern Italy). The main goal of this study is to provide a suitable resolution model of the sea tides including low frequency (seiches), tidal bands and non-linear tides. The spectral analyses of the tide gauge records lead us to identify a number of seiche periods some of them already known from the literature and some other unknown. Furthermore, we target a non-conventional purpose of the tidal analysis, namely extracting from the tide gauge records the volcano-tectonic signal (vertical ground displacement) in the resurgent Campi Flegrei caldera. We suggest a method to filter out the volcano-tectonic signal (bradyseism) from the tide gauge records by deconvolving it from two records, one collected in the active volcanic area (Pozzuoli) and the other one collected in a tectonically stable station (Napoli), located beyond the caldera rim. Finally, we retrieve the relative mean sea level change in the Gulf of Naples and compare it with the trend found in five tide gauges spread along the Italian coast.
Highlights
Neapolitan volcanic district is among the areas with the highest volcanic risk due to the intense urbanization
We evaluate the relative mean sea level (RMSL) in the Gulf of Naples and we compare the trend found in NAPT with that evaluated at four tide gauges
Mean sea level have been measured throughout the 20th century by means of tide gauges located along shorelines in several countries
Summary
Neapolitan volcanic district is among the areas with the highest volcanic risk due to the intense urbanization. Somma-Vesuvius and Campi Flegrei caldera, overlook the Gulfs of Napoli and Pozzuoli (southern Italy), respectively. Campi Flegrei caldera (CFc) consists of a continental and submerged part It formed during two major caldera collapses related to the eruptions of the Campanian Ignimbrite (39 ka, Fedele et al, 2003; Marianelli et al, 2006) and the Neapolitan Yellow Tuff (15 ka, Deino et al, 2004), respectively (Orsi et al, 1996). U. Tammaro et al.: Neapolitan volcanic area Tide Gauge Network movement which characterises the dynamics of several volcanic areas and was firstly recognised and studied at this caldera The main goal of this paper, beyond the study of the ground displacements, is to characterize the tidal response of the two basins, Gulf of Napoli and Gulf of Pozzuoli, through a spectral analysis of the tide gauge records to extract both the main tidal components and seiches at each station of the network.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
