INVESTIGATION AT GLOBAL AND MEDITERRANEAN SCALES OF MEAN SEA LEVEL HEIGHT VARIABILITY BY SINGULAR SPECTRUM ANALYSIS
Journal Title: Academic Research International - Year 2011, Vol 1, Issue 1
Abstract
The spatial sampling offered by satellite altimetry and its continuity during the last years are major assets to provide an improved vision of the oceanic variability. In this paper, the seasonal and interannual variability of global and Mediterranean mean sea level height variability are studied through the maps of sea level anomalies (MSLAs) that extend back to 1993. The singular spectrum analysis (SSA) method is applied to the averaged MSLAs time series on global and Mediterranean scale separately. The SSA technique shows that the global mean sea level variability is dominated by an increasing trend, which represents 91.52% of the initial MSLAs time series. The rate of the global long-term trend as seen by SSA appears to be about 2.8 mm /yr. Also, the SSA shows that the global mean sea level is object of significant harmonic components: annual signal, semi-annual signal and four months signal. The amplitude of the grouped seasonal components varies between -0.83 and 1.04 cm. Likewise, the first harmonic components in the Mediterranean sea are: annual signal, semiannual signal and 7 months signal, where the annual frequency signal is particularly strong. Its contribution represents 72.38 % of the initial averaged MSLAs and its amplitude is of 14.4 cm. The rate of mean sea level height variability over the Mediterranean sea is estimated of 1.72 mm/yr.
Authors and Affiliations
Mahdi Haddad, Mohamed Belbachir, Salem Kahlouche
NEW MEDIA, CULTURE AND SOCIETY
The paper initiates with mankind, globalization and the contemporary mass media role played through multiple media approach at the dawn of third millennium and the need to address the challenge of technological plura...
ONE HUNDRED YEARS OF TAYLORISM: IS IT STILL RELEVANT TODAY?
Frederick Taylor is known as the father of modern management. Taylor’s scientific management revolutionized industry and helped shape modern organization. Scientific management revolutionized industry because it explai...
THE INFLUENCE OF INCLINATION ANGLE ON NATURAL CONVECTION IN A RECTANGULAR ENCLOSURE
An experimental work was conducted to investigate the influence of inclination angle on natural heat transfer in a rectangular enclosure. The enclosure length was (100 cm) with a square cross section (10×10 cm). All th...
Spatial Analysis of Potential Conflicts in the Forest Region in the Perspective of Sustainable Forest Planning
Increasing encroachment, reduced biodiversity and increased conflicts in the forest region have become a national problem. The main cause is still contained forest areas that do not have regional boundaries, no forest ma...
A CASE FOR THE USE OF MORINGA OLIFERA AS A NATURAL COAGULANT TO IMPROVE WATER SUPPLY IN RURAL FARMS IN NIGERIA
Reports of potable water supply situation in Nigeria recently showed poor performance, most especially in the rural areas, probably owing to shortage of funds to provide water supply facilities and sometimes negligence....