Papers by AMILCAR ERNESTO CALZADA ESTRADA
Thermal efficiency dataset around Cuban seas (TEDACS)
Open research Europe, Jan 9, 2024
Simple-Particle Analysis model (SPartA)
Effects of meteo-oceanographic conditions on the weathering processes of oil spills in northeastern Brazil
Marine Pollution Bulletin
Pan-American Journal of Aquatic Sciences, Aug 1, 2022
Currently, wave energy represents a challenge to the world's energy needs. There are innumerable ... more Currently, wave energy represents a challenge to the world's energy needs. There are innumerable prototypes and even commercial models that reveal the ability to handle the difficulties posed by the sea and obtain electrical energy. However, the implementation of these projects has shown that wave energy is not an easy resource to manipulate. In the economic aspect, the main barriers are given by the high cost of technologies in the prototype phase, as well as their operations. Regarding the technological barriers, the main ones correspond to the technological risk of the prototypes in the testing phase and the lack of specialized human capital that allows the industry to be implemented at a local level. Even so, the inventiveness and initiative of some allow them to work and face adversity with a clear objective: to take advantage of the wave power potential. In the present investigation, an exhaustive study is carried out on wave energy, its current development, techniques and technologies for its exploitation, environmental impacts, and advantages and disadvantages of the use of this renewable energy.
Química Nova
Multiple environmental problems are caused by the accumulation of nitrogen (N) and phosphorus (P)... more Multiple environmental problems are caused by the accumulation of nitrogen (N) and phosphorus (P) in river water on its way to the ocean. The objective of this work was to determine the N and P loads in 12 hydrographic basins that flow into estuaries along the northeastern coast of Brazil using established methods. Additionally, natural and anthropogenic loads trends in the hydrographic basins of 12 tropical rivers in northeastern Brazil over 27 years (1990-2016) were evaluated. The results indicated an annual average increase of +1.1% in population density, while precipitation showed no significant trend. The anthropogenic loads were 21 and 112 times higher than natural inputs for N and P, respectively. Anthropogenic sources accounted for ~ 96% of all contributions. The positive trends of these loads (mainly wastewater) represented an annual average increase of 1.1% for N and 1.2% for P, for all river basins included in this study. These percentages represent average annual loads o...
Pan-American Journal of Aquatic Sciences, Dec 12, 2022
The research shows an analysis of both wave energy potential in the seas adjacent to Cuba and ext... more The research shows an analysis of both wave energy potential in the seas adjacent to Cuba and extreme meteorological phenomena that could damage the facilities exploiting such resource. The data of the parameters of the sea states were obtained from the outputs of the WAVEWATCH III model, in the 2000-2018 period, available in the database of the United States' National Oceanic and Atmospheric Administration. The analysis of extreme meteorological events affecting the western and eastern regions showed that the former is more likely to be affected by such phenomena. Despite the limitations imposed by the resolution of the grid used, it was found that the wave potential in the seas adjacent to Cuba is generally limited, and there are usable wave power density levels only at the western and eastern ends of the island.
Creates structured grids from a random distribution of data collection points (mTriGrid)
HAL (Le Centre pour la Communication Scientifique Directe), Jan 3, 2023
Instituto de Ecologia y Ciencias Ambientales
Currently, wave energy represents a challenge to the world's energy needs. There are innumerable ... more Currently, wave energy represents a challenge to the world's energy needs. There are innumerable prototypes and even commercial models that reveal the ability to handle the difficulties posed by the sea and obtain electrical energy. However, the implementation of these projects has shown that wave energy is not an easy resource to manipulate. In the economic aspect, the main barriers are given by the high cost of technologies in the prototype phase, as well as their operations. Regarding the technological barriers, the main ones correspond to the technological risk of the prototypes in the testing phase and the lack of specialized human capital that allows the industry to be implemented at a local level. Even so, the inventiveness and initiative of some allow them to work and face adversity with a clear objective: to take advantage of the wave power potential. In the present investigation, an exhaustive study is carried out on wave energy, its current development, techniques and technologies for its exploitation, environmental impacts, and advantages and disadvantages of the use of this renewable energy.
Latin American Data in Science
This article describes six ocean datasets consistent in anomalies of biogeochemical, physical, se... more This article describes six ocean datasets consistent in anomalies of biogeochemical, physical, sea wave, biological, oceanic and chemical parameters (DACS-BGC, DACS-PHY, DACS-WAVE, DACS-BIO, DACS-OCE and DACS-CHEM) in several time scales from 3-hourly to monthly frequencies, either on the sea surface, downward/upward fluxes between the ocean and the atmosphere and the water column in the Caribbean basin (Gulf of Mexico, Caribbean Sea and Atlantic Ocean) in a geographical domain from latitudes 8 degrees to 35 degrees North and from longitudes 45 degrees to 100 degrees West, obtained, from several satellites, modeling services and observational programs. The datasets were created in NetCDF format conserving their original horizontal resolutions of 1.0, 0.5, 0.26, 0.08333 and 0.04 degrees in gridded structure; only the WAVEWATCH3 dataset has a non-uniform step in latitude and longitude. This internal data structure facilitates its handling due to a wide diversity of existent freeware ...
Database of Anomalies in the Caribbean Sea (physical parameters): DACS-PHY
Science Data Bank Datasets
Database of Anomalies in the Caribbean Sea (oceanographic parameters): DACS-OCE
Science Data Bank Datasets
Database of Anomalies in the Caribbean Sea (biogeochemical parameters): DACS-BGC
Monthly anomalies of biogeochemical parameters in the Caribbean Sea computed from the MODIS-Aqua,... more Monthly anomalies of biogeochemical parameters in the Caribbean Sea computed from the MODIS-Aqua, CO2 Flux and GLOBAL_REANALYSIS_BIO_001_029 datasets. These anomalies are very useful for chemical oceanographers and marine biologists who need to analyze data and trends in tropical regions to carry out the analysis of variations in nutrient and chlorophyll concentrations, behavior of changes in primary productivity and trends in ocean acidification.<br>
Evaluación De La Energía Maremotérmica en La Costa Norte De Las Provincias Holguín y Guantánamo
This technical note presents the graphical outputs of the lagrangian model PETROMAR-3D, version 2... more This technical note presents the graphical outputs of the lagrangian model PETROMAR-3D, version 2.1G, specialized to assume the operative work before real spills and to obtain statistical results before climatic executions. The scenarios were created in the waters adjacent to the Brazilian NE, with simulation times of thirty days, every 3 hours in the most representative months of each season of the year. The numerical simulations were focused to characterize the oil drift, taking 3 starting points located at (30°W, 6°S), (30°W, 7°S) and (30°W, 8°S). As initial and boundary conditions the surface currents of the HYCOM (global domain 3-hourly and 1/12 degree analysis) hydrodynamic model were used and for the spill a light crude oil of 35 API (849 kg m<sup>-3</sup>) and initial volumes of 3145 bb (500 m<sup>3</sup>) were considered. As main results, it was found that the spills located at point 1 had the fastest drifts and in many cases the slick continued to t...
Revista Cubana de Meteorología, 2003
Figures of the outputs of the oil slick trajectory simulations performed with the PETROMAR-3D mod... more Figures of the outputs of the oil slick trajectory simulations performed with the PETROMAR-3D model in northeastern Brazil in the months of January, April, July and October.The figures presented here are a climatology every 6 hours, so you should not take into account the year that is at the top left of each figure, only the month, day and time are valid in each track. <br><br>
Aplicación Metodológica y Evaluación De La Sensibilidad Costera Ante El Impacto De Derrames De Hidrocarburos
This article shows a modeling exercise of hypothetical oil spills in the northwestern portion of ... more This article shows a modeling exercise of hypothetical oil spills in the northwestern portion of the Exclusive Economic Zone of Cuba to indicate to the reader the importance and the need for probabilistic modeling amid the complex dynamics of the meteorological and oceanic systems present in that region, which governs the movement of oil slicks. The PETROMAR-3D oil drift forecast lagrangian model is used for this exercise. The trajectory of the spill and its fate to the coast are analyzed through winter and cyclonic seasons scenarios respectively, in addition a spill of an extreme event scenario (Hurricane Irma) is simulated. A new approach is introduced, based on the direction of slick movement in the first 24 hours, for the analysis of the relationship between the trajectories and the fate of hydrocarbon slicks to the coasts.
Los accidentes por derrames de hidrocarburos en el mar. historia de la modelación matemática de sus procesos físicos
El trabajo trata sobre un tema priorizado por todos los paises que conforman el area del Caribe y... more El trabajo trata sobre un tema priorizado por todos los paises que conforman el area del Caribe y el Golfo de Mexico: los accidentes por derrame de hidrocarburos en el mar. Se introduce con una breve panoramica de la situacion de las costas de la zona y el anuncio del peligro de una posible afectacion.Como primer resultado se obtiene un resumen que contempla los procesos fisicos ocurridos en la mancha del hidrocarburo. Del mismo modo se brindan los detalles de como cada uno de ellos han sido modelados desde los primeros intentos hasta la actualidad. Una interesante relacion de programas disponibles con sus principales caracteristicas es mostrada, como reflejo de la evolucion de la tecnologia y medios computacionales en la simulacion.Unido al panorama historico ofrecido, se exponen los resultados alcanzados por el departamento de Meteorologia Marina del Instituto de Meteorologia en torno al tema. Se aplica PHOENICS en escenarios de la plataforma insular cubana con muy buenos resultad...
Environmental Sciences Proceedings, 2021
There have been several advances in understanding the North Atlantic Oscillation (NAO), but there... more There have been several advances in understanding the North Atlantic Oscillation (NAO), but there are still uncertainties regarding its level of influence on the tropical climate. That is why this work determines the influence of the NAO on the main hydrometeorological events that affected Cuba in the 1999–2016 period. To comply with this, a regression analysis is carried out in the CurveExpert software where the combined influence of the NAO and El Niño-Southern Oscillation on hydrometeorological events is also examined. It was found that the NAO exerts a greater influence on Cuba when it is in its negative phase during the winter season.
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Papers by AMILCAR ERNESTO CALZADA ESTRADA