14 research outputs found
Análisis de la concentración diaria de la precipitación en la Cuenca del Mediterráneo Occidental
No full textEl análisis de la precipitación diaria es un tema de gran interés en el litoral de la cuenca del Mediterráneo occidental. El interés por este tipo de análisis viene justificado por la presencia de los mayores riesgos ambientales en el Mediterráneo occidental. En esta tesis se analiza la concentración diaria de la precipitación entre 1952-2010, a partir del cálculo de los valores de la concentración diaria CI1, CI5, CI10 e IG1 de la precipitación, y la correlación entre ellos en diferentes periodos. En segundo lugar, se calcula la variación de la concentración diaria de la precipitación entre los subperiodos 1951-1980 al 1981-2010. En tercer lugar, se presenta la distribución espacial de los cuatro índices citados anteriormente. En el cuarto lugar, se analizan las tendencias de la concentración de la precipitación diaria anualmente y la situación sinóptica de los años extremos en cuanto a la concentración diaria de la precipitación en el periodo 1970-2010. Los resultados obtenidos pueden resumirse como; una elevada concentración pluviométrica en la costa mediterránea francesa y la franja oriental de la España peninsular, con valores del IG1 y del CI1 que superan en varios observatorios 0,70 y llegan a aproximarse en alguno a 0,73 (el 25 % de los días más lluviosos aporta hasta el 82 % del total pluviométrico), como se confirma, la existencia de un cambio significativo del índice CI1 anual de la precipitación diaria en el litoral de la cuenca del Mediterráneo occidental durante los últimos 60 años. Finalmente, se concluye que un CI alto se relaciona notablemente con una frecuencia ciclónica (C) alta y una frecuencia anticiclónica (A) baja y viceversa
Évolutions de la concentration des précipitations journalières sur les littoraux du bassin méditerranéen occidental (1951-2010)
No full textIn this paper, the nonparametric MANN-KENDALL test is used to detect the trends of the annual values of the daily precipitation concentration index (CI1) recorded in the coastal areas of the western Mediterranean Sea. Daily series of 45 meteorological observatories distributed in a relatively uniform way to the coastal lands of the western Mediterranean Sea and the Balearic Islands, Corsica, Sardinia and Sicily of the period of 60 years (1951-2010) were analyzed. The results reveal significant changes of the annual concentration index (CI1) of the daily precipitation for the complete period and two sub-periods of 30 years studied (1951-1980 and 1981-2010). Over the full period, ten stations out of thirty show a significant positive evolution of the index and only two significant negative developments. The same trend is evident in the sub-period 1981-210 (25.6 % of stations with significant positive developments). But the lack of homogeneity of the results does not lead to the conclusion of a general change in the distribution of daily rainfall
Spatial distribution of daily rainfall in the Region of Alicante
No full textEl análisis de la precipitación diaria es un tema de gran interés en España. La importancia de este tipo de análisis deriva sobre todo del hecho de que las precipitaciones torrenciales constituyen uno de los mayores riesgos ambientales en el litoral mediterráneo ibérico. En este trabajo se analiza la concentración temporal diaria de la precipitación, a partir del cálculo del índice de concentración pluviométrico (CI), a una escala de detalle –la provincia de Alicante–, y la situación sinóptica de una muestra de días con precipitaciones torrenciales en la citada provincia. Los resultados obtenidos pueden resumirse en: 1) Una elevada concentración pluviométrica en el área de la capital y, sobre todo, en la parte septentrional de la provincia, donde el 30 % de los días lluviosos aportan el 75 % del total anual; 2) la importancia de los episodios torrenciales consecuencia de una depresión aislada en niveles altos (DANA) o «gota fría»; y 3) la utilidad del índice (CI) para la planificación territorial y la mitigación del riesgo en el área mediterránea de estudio.The analysis of daily precipitation has a great interest for Spain. This type of analysis is important because torrential rainfall is one of the most critical natural risk in the Iberian Mediterranean coast. In this paper the daily concentration of rainfall, by means of the Concentration Index (CI), in the province of Alicante, as well as the synoptic situation of a sample of days with heavy precipitation in the same province, are analysed. The results can be summarized as follows: 1) A high concentration of rainfall in the capital area and, especially, in the northern part of the province, where the 30% of rainy days account for much as 75% of the annual total; 2) torrential rainfall events as a result of isolated cold depression at high tropospheric levels (DANA), or cut-off low; and 3) the usefulness of the CI for the territorial planning in the study area.Este trabajo ha sido posible gracias a la financiación por el Ministerio de Ciencia e Innovación del proyecto CGL2011-29263-C02-01, 2012-2014, el Instituto Agronómico Mediterráneo de Zaragoza (IAMZ), el apoyo del Grup de Climatología (2009 SGR 443) y la beca FPI de que disfruta el primer autor
Distribución espacial de la concentración diaria de la precipitación en la provincia de Alicante
No full textThe analysis of daily precipitation has a great interest for Spain. This type of analysis is important because torrential rainfall is one of the most critical natural risk in the Iberian Mediterranean coast. In this paper the daily concentration of rainfall, by means of the Concentration Index (CI), in the province of Alicante, as well as the synoptic situation of a sample of days with heavy precipitation in the same province, are analysed. The results can be summarized as follows: 1) A high concentration of rainfall in the capital area and, especially, in the northern part of the province, where the 30% of rainy days account for much as 75% of the annual total; 2) torrential rainfall events as a result of isolated cold depression at high tropospheric levels (DANA), or cut-off low; and 3) the usefulness of the CI for the territorial planning in the study area.El análisis de la precipitación diaria es un tema de gran interés en España. La importancia de este tipo de análisis deriva sobre todo del hecho de que las precipitaciones torrenciales constituyen uno de los mayores riesgos ambientales en el litoral mediterráneo ibérico. En este trabajo se analiza la concentración temporal diaria de la precipitación, a partir del cálculo del índice de concentración pluviométrico (CI), a una escala de detalle –la provincia de Alicante–, y la situación sinóptica de una muestra de días con precipitaciones torrenciales en la citada provincia. Los resultados obtenidos pueden resumirse en: 1) Una elevada concentración pluviométrica en el área de la capital y, sobre todo, en la parte septentrional de la provincia, donde el 30 % de los días lluviosos aportan el 75 % del total anual; 2) la importancia de los episodios torrenciales consecuencia de una depresión aislada en niveles altos (DANA) o «gota fría»; y 3) la utilidad del índice (CI) para la planificación territorial y la mitigación del riesgo en el área mediterránea de estudio
Seed quality as a proxy of climate-ready orphan legumes: the need for a multidisciplinary and multi-actor vision
No full textIn developing countries, orphan legumes stand at the forefront in the struggle
against climate change. Their high nutrient value is crucial in malnutrition and
chronic diseases prevention. However, as the ‘orphan’ definition suggests, their
seed systems are still underestimated and seed production is scanty. Seed
priming is an effective, sustainable strategy to boost seed quality in orphan
legumes for which up-to-date guidelines are required to guarantee reliable and
reproducible results. How far are we along this path? What do we expect from
seed priming? This brings to other relevant questions. What is the socioeconomic
relevance of orphan legumes in the Mediterranean Basin? How to
potentiate a broader cultivation in specific regions? The case study of the
BENEFIT-Med (Boosting technologies of orphan legumes towards resilient
farming systems) project, developed by multidisciplinary research networks,
envisions a roadmap for producing new knowledge and innovative technologies to improve seed productivity through priming, with the long-term
objective of promoting sustainability and food security for/in the climatesensitive
regions. This review highlights the existing drawbacks that must be
overcome before orphan legumes could reach the state of ‘climate-ready crops’.
Only by the integration of knowledge in seed biology, technology and agronomy,
the barrier existing between research bench and local agricultural fields may be
overcome, generating high-impact technical innovations for orphan legumes.
We intend to provide a powerful message to encourage future research in line
with the United Nations Agenda 2030 for Sustainable Development
Spatial distribution of the daily precipitation concentration index in Algeria
No full textIn this paper, the spatial and temporal distribution of the daily precipitation concentration index (CI) in Algeria (south Mediterranean Sea) has been assessed. CI is an index related to the rainfall intensity and erosive capacity; therefore, this index is of great interest for studies on torrential rainfall and floods. Forty-two daily rainfall series based on high-quality and fairly regular rainfall records for the period from 1970 to 2008 were used. The daily precipitation CI results allowed the identification of three climate zones: the northern country, characterized by coastal regions with CI values between 0.59 and 0.63; the highlands, with values between 0.57 and 0.62, except for the region of Biskra (CI D0.70); and the southern region of the country, with high rainfall concentrations with values between 0.62 and 0.69
Spatio-Temporal Dynamics of crAssphage and Bacterial Communities in an Algerian Watershed Impacted by Fecal Pollution
No full textThis study investigates the influence of urban pollution and climate dynamics on water quality and the bacterial communities in an Argelian watershed. Twenty-one sampling campaigns were conducted over two years at six sites along the Oued Boussellam, a river impacted by the effluent of a sewage treatment plant, from a low-polluted site to a water reservoir within a 50 km distance. Fecal indicators and the human fecal marker crAssphage were monitored. Illumina 16S rRNA amplicon sequencing was used to assess water microbial populations’ changes. Urban sewage discharge had an impact on the river quality and microbial ecosystem, which was attenuated along the river course. Significant reductions (>4 log10 for E. coli and somatic coliphages, >3 log10 for crAssphage) occurred, particularly during high-temperature periods. crAssphage correlated strongly with somatic coliphages downstream the river. Seasonal differences were observed in the diversity of the bacterial communities, with higher values during the high-temperature period. The genus-level community structure was similar at highly polluted river sites, also displaying seasonal differences. Despite high pollution levels, natural processes reduced fecal indicators to acceptable levels in the reservoir as well as shaped the bacterial communities along the river, highlighting the importance of understanding indicator persistence and microbial community resilience for effective water quality management within the context of the global warming scenario
Spatiotemporal variability of daily precipitation concentration and its relationship to teleconnection patterns over the Mediterranean during 1975–2015
No full textSpatial distribution of the daily precipitation concentration index in Algeria
No full textIn this paper, the spatial and temporal distribution of the daily precipitation concentration index (CI) in Algeria (south Mediterranean Sea) has been assessed. CI is an index related to the rainfall intensity and erosive capacity; therefore, this index is of great interest for studies on torrential rainfall and floods. Forty-two daily rainfall series based on high-quality and fairly regular rainfall records for the period from 1970 to 2008 were used. The daily precipitation CI results allowed the identification of three climate zones: the northern country, characterized by coastal regions with CI values between 0.59 and 0.63; the highlands, with values between 0.57 and 0.62, except for the region of Biskra (CI = 0.70); and the southern region of the country, with high rainfall concentrations with values between 0.62 and 0.69.National Climate Center of AlgeriaClimatology GroupResearch group 443 GenCat at the University of BarcelonaNatl Meteorol Off, Natl Climate Ctr, Algiers, AlgeriaUniv Barcelona, Climatol Grp, Barcelona 08001, SpainUNESP Ourinhos, Dept Geog, BR-1500 Sao Paulo, BrazilUNESP Ourinhos, Dept Geog, BR-1500 Sao Paulo, BrazilNational Climate Center of Algeria: CGL2011-29263-C02-01Climatology Group: CGL2011-29263-C02-0
Progrès méthodologiques dans l´analyse de la concentration journalière desprécipitations en Espagne peninsulaire
No full textThe daily concentration of the precipitation in 32 meteorological stations in peninsular Spain by means of the Concentration Index (Martin-Vide, 2004) and similar indexs using 5 and 10 mm classes, and the corresponding Gini’s indexs, has been analysed. The maps for the period 1951-2010, as well as for the subperiods 1951-1980 and 1981-2010, have been compared. Finally, the changes in the daily concentration of the precipitation between the first and the second subperiods are studied.En el presente trabajo, partiendo del índice de concentración diaria de la precipitación de Martin-Vide (2004), basado en clases de 1 mm de longitud, se analiza la concentración de la precipitación en 32 observatorios de la España peninsular con índices similares usando clases de 5 y de 10 mm, así como con los índices de Gini construidos con las mismas longitudes de clase. Se comparan los mapas resultantes para el período 1951-2010 y los subperíodos 1951-1980 y 1981-2010. Finalmente, con los índices citados se analizan las variaciones en la concentración diaria de la precipitación al pasar del primer al segundo subperíodo.Le présent travail a pour objectif l’analyse à partir de l’indice de concentration quotidienne des précipitations de Martin-Vide (2004), basé sur des classes de 1 mm de longueur, la concentration des précipitations de 32 observatoires d’Espagne péninsulaire avec des indices similaires de 5 et 10 mm, ainsi que les indices de Gini construits avec les mêmes longueurs. Nous comparons les cartes qui en résultent pour la période 1951-2010 et sous-périodes de 1951-1980 et de 1981-2010. Enfin, avec les indices indiqués, on analyse les variations de la concentration quotidienne des précipitations allant du premier à la deuxième sous-période
