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Statistical Trend Analysis and Extreme Distribution of Significant Wave Height from 1958 to 1999 – an Application to the Italian Seas : Volume 6, Issue 3 (08/09/2009)

By Martucci, G.

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Book Id: WPLBN0004021072
Format Type: PDF Article :
File Size: Pages 32
Reproduction Date: 2015

Title: Statistical Trend Analysis and Extreme Distribution of Significant Wave Height from 1958 to 1999 – an Application to the Italian Seas : Volume 6, Issue 3 (08/09/2009)  
Author: Martucci, G.
Volume: Vol. 6, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Carniel, S., Chiggiato, J., Sclavo, M., Galati, M. B., Martucci, G., & Lionello, P. (2009). Statistical Trend Analysis and Extreme Distribution of Significant Wave Height from 1958 to 1999 – an Application to the Italian Seas : Volume 6, Issue 3 (08/09/2009). Retrieved from

Description: School of Physics & Centre for Climate and Air Pollution Studies, Environmental Change Institute, National University of Ireland, Galway, UK. The study is a statistical analysis of sea states timeseries derived using the wave model WAM forced by the ERA-40 dataset in selected areas near the Italian coasts. For the period 1 January 1958 to 31 December 1999 the analysis yields: (i) the existence of a negative trend in the annual- and winter-averaged sea state heights; (ii) the existence of a turning-point in late 70's in the annual-averaged trend of sea state heights at a site in the Northern Adriatic Sea; (iii) the overall absence of a significant trend in the annual-averaged mean durations of sea states over thresholds; (iv) the assessment of the extreme values on a time-scale of thousand years. The analysis uses two methods to obtain samples of extremes from the independent sea states: the r-largest annual maxima and the peak-over-threshold. The two methods show statistical differences in retrieving the return values and more generally in describing the significant wave field. The study shows the existence of decadal negative trends in the significant wave heights and by this it conveys useful information on the wave climatology of the Italian seas during the second half of the 20th century.

Statistical trend analysis and extreme distribution of significant wave height from 1958 to 1999 – an application to the Italian Seas

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