Juan A. Vargas-Alemañy

University of Alicante | UA · Departamento de Matemática Aplicada

This study investigates the long-term temporal patterns of sea level changes by analyzing monthly tide gauge data from 1950 to 2022 (42 to 72 years) along the European coastline and monthly altimetry data from 1992 to 2024 in the surrounding European seas. The primary focus is on signals with periods longer than 5 years. The application of wavelet-...

Geostrophic currents, driven by the Coriolis and pressure gradient forces, are crucial for understanding ocean circulation. The Antarctic Circumpolar Current (ACC) in the Southern Ocean, which surrounds Antarctica, has a significant global impact, and its volume transport (VT) remains a challenge to measure. We use satellite data, combining altimet...

In this study, we analyze the variations in sea level observed at Tide Gauge stations across the Mediterranean Sea, utilizing datasets spanning over 50 years. Our investigation focuses on identifying various cycles, seasonal patterns, and non-seasonal fluctuations within the data collected from the selected tide gauge stations. We employ empirical...

Introduction: A geodetic estimation of the surface geostrophic currents can be obtained from satellite data by combining sea surface height measurements obtained from altimetry missions with geoid data from gravity missions. These surface geostrophic currents serve as a reference for inferring a comprehensive three-dimensional (3D) geostrophy by pr...

In this work, we analyse the sea level variations on both annual and interannual scales, covering the time span from 1993 to 2021. We consider a regional solution for the Mediterranean Sea of sea level anomalies data from multi-mission satellite altimetry (Jason-3, Sentinel-3A, HY-2A, Saral/AltiKa, Cryosat-2, Jason-2, Jason-1, T/P, ENVISAT, GFO, ER...

The Mediterranean-Black Sea system consists of two semi-enclosed basins connected by the Turkish Straits. In turn, the Mediterranean Sea is connected to the Atlantic Ocean through the narrow Strait of Gibraltar. The hydrological cycle of the system is driven by fresh water exchanges between the atmosphere, continents and oceans, and by salty water...

The Mediterranean-Black Sea system consists of two semi-enclosed basins connected by the Turkish Straits. In turn, the Mediterranean Sea is connected to the Atlantic Ocean through the narrow Strait of Gibraltar. The hydrological cycle of the system is driven by fresh water exchanges between the atmosphere, continents and oceans, and by salty water...

Two important issues characterize the design of bootstrap methods to construct confidence intervals for the correlation between two time series sampled (unevenly or evenly spaced) on different time points: (i) ordinary block bootstrap methods that produce bootstrap samples have been designed for time series that are coeval (i.e., sampled on identic...

Event: 2020 Ocean Surface Topography Science Team Meeting (virtual) Session: The Geoid, Mean Sea Surfaces and Mean Dynamic Topography Presentation type: Poster The 3D geostrophic currents and the associated volume transport (VT) can be estimated from the GOCE and Altimetry satellite data and in-situ temperature and salinity profiles measured by the...

Event: 2020 Ocean Surface Topography Science Team Meeting (virtual) Session: Science II: Large Scale Ocean Circulation Variability and Change Presentation type: Poster Global water cycle involves water-mass transport on land, atmosphere, ocean, and among them. Quantification of such transport, and especially its time evolution, is essential to iden...

The N-body ring problem is a classical problem that describes the motion of particle attracted by the gravitational field of N+1 primary bodies. These bodies are distributed in a planar ring configuration, that is, a central primary and N primaries of equal mass located at the vertices of a regular polygon that is rotating on its own plane about th...