17 research outputs found

    Desarrollo de la actividad frontogenética en diferentes situaciones de precipitación intensa

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    se aborda el problema de los sistemas convectivos desarrollados sobre la península ibérica por dos motivos: (1) porque dan origen a precipitaciones intensas sobre todo el levante produciendo perdidas económicas y humanas de gran importancia. (2) para conocer el origen y génesis de estos sistemas convectivos sobre nuestra península, que tienen un carácter diferenciado en relación con los que se forman en otras latitudes, como en ee.uu. Partiendo de los conocimientos dinámicos y aplicados estos a la formación de los sistemas convectivos, se caracteriza a través del vector q las zonas de convergencia que dan origen a movimientos ascensionales como primera etapa para la formación de los mencionados sistemas. Se introduce una nueva definición de las caracteristicas de q teniendo en cuenta el calentamiento no adiabático, responsable fundamental del desarrollo explosivo de estos sistemas. Por otra parte, se profundiza en el conocimiento de los fenómenos físicos que caracterizan a un sistema convectivo, así como el carácter químico de la precipitación que producen. Para terminar, se desarrolla un modelo de diagnostico de tales sistemas, a partir de los sistemas de predicción de área limitad

    On the seasonal variability of the Canary Current and the Atlantic Meridional Overturning Circulation

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    Author Posting. © American Geophysical Union, 2017. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 122 (2017): 4518–4538, doi:10.1002/2017JC012774.The Atlantic Meridional Overturning Circulation (AMOC) is continually monitored along 26°N by the RAPID-MOCHA array. Measurements from this array show a 6.7 Sv seasonal cycle for the AMOC, with a 5.9 Sv contribution from the upper mid-ocean. Recent studies argue that the dynamics of the eastern Atlantic is the main driver for this seasonal cycle; specifically, Rossby waves excited south of the Canary Islands. Using inverse modeling, hydrographic, mooring, and altimetry data, we describe the seasonal cycle of the ocean mass transport around the Canary Islands and at the eastern boundary, under the influence of the African slope, where eastern component of the RAPID-MOCHA array is situated. We find a seasonal cycle of −4.1 ± 0.5 Sv for the oceanic region of the Canary Current, and +3.7 ± 0.4 Sv at the eastern boundary. This seasonal cycle along the eastern boundary is in agreement with the seasonal cycle of the AMOC that requires the lowest contribution to the transport in the upper mid-ocean to occur in fall. However, we demonstrate that the linear Rossby wave model used previously to explain the seasonal cycle of the AMOC is not robust, since it is extremely sensitive to the choice of the zonal range of the wind stress curl and produces the same results with a Rossby wave speed of zero. We demonstrate that the seasonal cycle of the eastern boundary is due to the recirculation of the Canary Current and to the seasonal cycle of the poleward flow that characterizes the eastern boundaries of the oceans.RAPROCAN Project ; Instituto Español de Oceanografía; and as part of the SeVaCan project Grant Number: CTM2013-48695; Ministerio de Economía y Competividad; Apoyo al Personal Investigador en Formación2017-12-0

    Una climatología de tormentas y sus índices realizada con ERA5 para Canarias

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    Este artículo es una exposición resumida de un trabajo de fin de grado realizado por el alumno de la ULPGC (Universidad de Las Palmas de Gran Canaria) David Martín Muñiz, codi- rigido por la propia ULPGC y por la Delegación Territorial de AEMET en Canarias. Se presenta una climatología de tormentas y sus índices asociados (sobre todo el CAPE) realizada con el rea- nálisis del modelo ERA5, desde 1979 a 2021, ambos inclusive. Se mostrará un desglose por estaciones, momentos del día y una descomposición usando estadística de series temporales. Los datos procedentes de ERA5 se compararán con la serie observada de descargas en un área alrededor del archipiélago, disponibles desde 2007. Se llevarán a cabo varios análisis y se extraerán algunas conclusiones

    The South Atlantic circulation between 34.5°S, 24°S and above the Mid‐Atlantic Ridge from an inverse box model

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    The South Atlantic Ocean plays a key role in the heat exchange of the climate system, as it hosts the returning flow of the Atlantic Meridional Overturning Circulation (AMOC). To gain insights on this role, using data from three hydrographic cruises conducted in the South Atlantic Subtropical gyre at 34.5°S, 24°S, and 10°W, we identify water masses and compute absolute geostrophic circulation using inverse modeling. In the upper layers, the currents describe the South Atlantic anticyclonic gyre with the northwest flowing Benguela Current (26.3 ± 2.0 Sv at 34.5°S, and 21.2 ± 1.8 Sv at 24°S) flowing above the Mid-Atlantic Ridge (MAR) between 22.4°S and 28.4°S (−19.2 ± 1.4 Sv), and the southward flowing Brazil Current (−16.5 ± 1.3 Sv at 34.5°S, and −7.3 ± 0.9 Sv at 24°S); the deep layers feature the southward transports of Deep Western Boundary Current (−13.9 ± 3.0 Sv at 34.5°S, and −8.7 ± 3.8 Sv at 24°S) and Deep Eastern Boundary Current (−15.1 ± 3.5 Sv at 34.5°S, and −16.3 ± 4.7 Sv at 24°S), with the interbasin west-to-east flow close to 24°S (7.5 ± 4.4 Sv); the abyssal waters present northward mass transports through the Argentina Basin (5.6 ± 1.1 Sv at 34.5°S, and 5.8 ± 1.5 Sv at 24°S) and Cape Basin (8.6 ± 3.5 Sv at 34.5°S–3.0 ± 0.8 Sv at 24°S) before returning southward (−2.2 ± 0.7 Sv at 24°S to −7.9 ± 3.6 Sv at 34.5°S), without any interbasin exchange across the MAR. In addition, we compute the upper AMOC strength (14.8 ± 1.0 and 17.5 ± 0.9 Sv), the equatorward heat transport (0.30 ± 0.05 and 0.80 ± 0.05 PW), and the freshwater flux (0.18 ± 0.02 and −0.07 ± 0.02 Sv) at 34.5°S and 24°S, respectively

    Extension of the core map of common bean with EST-SSR, RGA, AFLP, and putative functional markers

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    Microsatellites and gene-derived markers are still underrepresented in the core molecular linkage map of common bean compared to other types of markers. In order to increase the density of the core map, a set of new markers were developed and mapped onto the RIL population derived from the ‘BAT93’ × ‘Jalo EEP558’ cross. The EST-SSR markers were first characterized using a set of 24 bean inbred lines. On average, the polymorphism information content was 0.40 and the mean number of alleles per locus was 2.7. In addition, AFLP and RGA markers based on the NBS-profiling method were developed and a subset of the mapped RGA was sequenced. With the integration of 282 new markers into the common bean core map, we were able to place markers with putative known function in some existing gaps including regions with QTL for resistance to anthracnose and rust. The distribution of the markers over 11 linkage groups is discussed and a newer version of the common bean core linkage map is proposed

    Análisis de las propiedades psicométricas de la escala de ansiedad cognitiva frente a los exámenes en universitarios de Lima Metropolitana

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    psicométricas de la escala de ansiedad cognitiva frente a los exámenes en estudiantes universitarios de Lima Metropolitana. La metodología empleada fue de tipo psicométrico, el diseño que se abordó fue instrumental, de corte transversal y no experimental. Los instrumentos utilizados fueron la escala de ansiedad cognitiva frente a los exámenes (S-CTAS) de Cassady, Furlan y Pérez (2009) y la escala de procrastinación académica (EPA) adaptada en universitarios de Lima por Domínguez, Villegas y Centeno (2014). Los resultados sobre el análisis preliminar de los ítems evidenciaron una normalidad univariada, una adecuada correlación ítem-test corregida y un coeficiente omega de 0.92, índices de ajuste adecuados (χ²/gl: 1.6; CFI= .960; GFI= .906; SRMR= .030; RMSEA=.065; AIC= 186.128) y se evidenció una correlación directamente proporcional de la escala ansiedad cognitiva frente a los exámenes y la escala de procrastinación académica (p: <.001; r= .357). Esta investigación se realizó con el objetivo de analizar las propiedade
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