Estimating the monthly pCO2 distribution in the North Atlantic using a self-organizing neural network

[EN] Here we present monthly, basin-wide maps of the partial pressure of carbon dioxide (pCO2) for the North Atlantic on a latitude by longitude grid for years 2004 through 2006 inclusive. The maps have been computed using a neural network technique which reconstructs the non-linear relationships between three biogeochemical parameters and marine pCO2. A self organizing map (SOM) neural network has been trained using 389 000 triplets of the SeaWiFSMODIS chlorophyll-a concentration, the NCEP/NCAR reanalysis sea surface temperature, and the FOAM mixed layer depth. The trained SOM was labelled with 137 000 underway pCO2 measurements collected in situ during 2004, 2005 and 2006 in the North Atlantic, spanning the range of 208 to 437atm. The root mean square error (RMSE) of the neural network fit to the data is 11.6?atm, which equals to just above 3 per cent of an average pCO2 value in the in situ dataset. The seasonal pCO2 cycle as well as estimates of the interannual variability in the major biogeochemical provinces are presented and discussed. High resolution combined with basin-wide coverage makes the maps a useful tool for several applications such as the monitoring of basin-wide air-sea CO2 fluxes or improvement of seasonal and interannual marine CO2 cycles in future model predictions. The method itself is a valuable alternative to traditional statistical modelling techniques used in geosciences.

Enunciados SAD Básico

[ES]Enunciados de los ejercicios de nivel básico del Sistema de Ayuda al Dibujo (SAD)

SAD Básico. Soluciones

[ES] Soluciones de los ejercicios del Nivel Básico del Sistema de Apoyo al Dibujo (SAD)

Acto de homenaje al Dr. Ted Packard en el Día Internacional del Libro 2012.

[ES] Conferencia impartida por Ted Packard The Black Sea Flood was it Noah?s Flood?. Presentación a cargo de Félix Pintado Pico ; palabras a cargo de Avelina Fernández Manrique de Lara, Melchor González Dávila y Rafael Robaina Romero y conferencia impartida por Ted Packard en la Sala de Grado del Edificio de Ciencias Básicas el 23 de abril de 2012.

Análisis de materiales didácticos aplicados a la mejora de habilidades espaciales, el rendimiento académico y la motivación en los estudiantes de Ingeniería Gráfica

Programa de doctorado: Formación del Profesorado

Chemistry of Fe(II) in the presence of organic exudates from phytoplankton and of copper in seawater

Programa de doctorado de Oceanografía ; 2006-2008

Sudden cardiac death in individuals with normal hearts: an update

Sudden death (SD) is a tragic event and a world-wide health problem. Every year, near 4-5 million people experience SD. SD is defined as the death occurred in 1h after the onset of symptoms in a person without previous signs of fatality. It can be named "recovered SD" when the case received medical attention, cardiac reanimation effective defibrillation or both, surviving the fatal arrhythmia. Cardiac channelopathies are a group of diseases characterized by abnormal ion channel function due to genetic mutations in ion channel genes, providing increased susceptibility to develop cardiac arrhythmias and SD. Usually the death occurs before 40 years of age and in the autopsy the heart is normal. In this review we discuss the main cardiac channelopathies involved in sudden cardiac death along with current management of cases and family members that have experienced such tragic event.