M. Pacheco

M. Pacheco
Universidad de Las Palmas de Gran Canaria | ULPGC · Department of Physics

PhD

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26
Publications
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473
Citations

Publications

Publications (26)
Article
Fractal properties of deep ocean current speed time series, measured at a single-point mooring on the Madeira Abyssal Plain at 1000- and 3000-m depth, are explored over the range between one week and 5 years, by using the detrended fluctuation analysis and multifractal detrended fluctuation analysis methodologies. The detrended fluctuation analysis...
Conference Paper
Full-text available
Spatial variability of wave energy resource around the coastal waters of the Canary Archipelago is assessed by using a long-term data set derived by means of hindcasting techniques. Results reveal the existence of large differences in the energetic content available in different zones of the archipelago, mainly during spring and autumn. Areas with...
Article
Full-text available
The statistical distribution of zero up-crossing wave periods in Gaussian mixed sea-states is examined by using numerically simulated data. Nine different kinds of bimodal spectra are used to analyze the effects of the relative energy ratio and the peak frequency separation between the low- and high-frequency wave fields on the wave period distribu...
Conference Paper
Full-text available
The probability distribution of the maximum wave height in a sea state is examined in terms of the spectral peakedness and the sea state duration. The study is based on the analysis of numerically simulated gaussian wave records with given target spectra to fulfill the long duration and stationarity jointly required conditions, seldom found in natu...
Article
Full-text available
The statistical distribution of zero-crossing wave heights in Gaussian mixed sea states is examined by analyzing numerically simulated data. Nine different kinds of bimodal scalar spectra are used to study the effects of the relative energy ratio and the peak frequency separation between the low and high frequency wave fields on the wave height dis...
Article
Wave climate around Canary Islands is analysed from field measurements to evaluate the wave power availability as a renewable energy resource in these small oceanic islands far away from the mainland and fully dependent on fossil fuels for generating electricity and freshwater. It is observed that available wave energy may represent a considerable...
Conference Paper
The Northwest African Coastal Transition Zone (NACTZ) is a region with a high mesoscale activity characterised by cyclonic and anticyclonic eddies, and filaments associated with the Northwest African upwelling system. This work is focused mainly in the filaments observed in satellite images around Cape Jubi and Cape Bojador. The intensity and persi...
Conference Paper
The Canary archipelago acts as a barrier of about 500 km for the Canary Current, which flows along the north-west coast of Africa boundary, associated with the north-west African upwelling. As a consequence, this region is characterised by a large mesoscale turbulent activity. This paper deals with the effects of the most pronounced topographic fea...
Article
The preliminary results of ocean circulations in the Canary Islands area, obtained through laboratory simulations, were discussed. Large oil tanker spills accidents had demonstrated the particular susceptibility of the coastel environment to oil spills. Numerical models were developed by several authors to simulate the evolution of oil spills in th...
Article
The influence of the spectral bandwidth on the probabilistic structure of the joint distribution of wave heights and periods is analyzed by means of simulated wave records. In particular, the effects of the spectral bandwidth on the asymmetric and bimodal structure of the distributions are examined. Moreover, the adequacy of some theoretical models...
Article
Seasonal variability of recurrent phytoplankton pigment patterns in the Canary Islands area has been determined using historical data from Nimbus-7 Coastal Zone Color Scanner data. The main patterns associated with the islands are cyclonic and anticyclonic eddies downstream of the islands, apparently caused by their effect as a topographic obstacle...
Conference Paper
The transition zone between coastal and oceanic waters corresponding to eastern boundary currents is characterized by high mesoscale variability. Associated with this have been observed recurrent and persistent oceanographic features that appear in certain places. In the Canary Upwelling Region studied in this work it has been observed large cyclon...
Article
The transition zone between coastal and oceanic waters corresponding to eastern boundary currents is characterized by high mesoscale variability. Associated with this have been observed recurrent and persistent oceanographic features that appear in certain places. In the Canary Upwelling Region studied in this work it has been observed large cyclon...
Article
This study reports hydrographic and biological observations from three cruises where cyclonic and anticyclonic eddies were observed downstream of Gran Canaria island. Based on field data and remote sensing images (AVHRR and CZCS), two mechanisms associated with island-generated eddies, largely responsible for the formation and distribution of chlor...
Article
Este trabajo presenta el análisis de los efectos de las irregularidades de la línea de costa y la batimetría de la platafoffi1a costera africana, así como la presencia de las Islas Canarias, sobre la denominada Corriente de Canarias, en la región comprendida entre 24° N y 30° N de latitud y 12° O y 19° O de longitud. Haciendo uso de los resultados...

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