Ponencia presentada en: XXXIV Jornadas Científicas de la AME y el XVII Encuentro Hispano Luso de ... more Ponencia presentada en: XXXIV Jornadas Científicas de la AME y el XVII Encuentro Hispano Luso de Meteorología celebrado en Teruel, del 29 de febrero al 2 de marzo de 2016
En esta contribucion se estudia, a traves de las variables meteorologicas registradas en un labor... more En esta contribucion se estudia, a traves de las variables meteorologicas registradas en un laboratorio atmosferico de capa limite y mediante herramientas de analisis multiescala (la transformada wavelet y la descomposicion multiresolucion), la irrupcion de un flujo catabatico en una region muy llana y homogenea de la meseta castellana. Se muestran las analogias que pueden establecerse con los frentes meteorologicos clasicos, y se estudia la transformacion del regimen de turbulencia a la llegada del flujo catabatico, asi como la formacion de ondas de gravedad en la interfase con el aire mas calido situado por encima .
C. Camino, S. Alonso-Pérez, E. Terradellas, S. Rodríguez, A.J. Gomez-Pelaez, P.M. Romero-Campos, ... more C. Camino, S. Alonso-Pérez, E. Terradellas, S. Rodríguez, A.J. Gomez-Pelaez, P.M. Romero-Campos, Y. Hernández, S. Basart, J.M.Baldasano, E. Cuevas Izaña Atmospheric Research Centre, AEMET, Santa Cruz de Tenerife, Spain Institute of Environmental Assessment and Water Research (CSIC) Barcelona, Spain Spanish Meteorological Agency, AEMET, Barcelona, Spain Earth Sciences Department, Barcelona Supercomputing Center-Centro Nacional de Supercomputación (BSCCNS), Barcelona, Spain Environmental Modeling Laboratory, Technical University of Catalonia, Barcelona, Spain
Esta comunicacion muestra los resultados de aplicar un modelo meteorologico de mesoescala a alta ... more Esta comunicacion muestra los resultados de aplicar un modelo meteorologico de mesoescala a alta resolucion sobre una region centrada en el aeropuerto de Madrid-Barajas. Estos resultados confirman el modelo conceptual desarrollado por el INM que relaciona la formacion de vientos catabaticos y la existencia de lineas de convergencia de flujos en la zona, asi como su relacion con la formacion de niebla. [EN]This contribution shows the results of a mesoscale weather prediction model run at high resolution over a region centred at the Madrid-Barajas airport. These results confirm the goodness of a conceptual model developed by the INM, which relates katabatic winds with the existence of convergence lines over the area, as well as their relationship with fog formation.
Basicament, a I'hora de fer una prediccio del temps, el metcoroleg rep dos tipus d'inform... more Basicament, a I'hora de fer una prediccio del temps, el metcoroleg rep dos tipus d'informacio: dades d'observacio i resultats de models numerics que simulen l'evolucio de l'atmosfera. Aquest esquema simplificat es representat a la figura 1. Els metodes de treball varien notablement segons I'abast temporal do la prediccio. Seguint I'esquema de la figura 1, es pot afirmar que, com mes curt sigui el termini de la prediccio, mes imporrancia relativa tindra la informacio rebuda des del cami numero 2; es a dir, per a. una prediccio a curt termini es fonarnental l'obtencio i l'assimilacio de Jades d'observacio abundants, continues i precises.
On 2 June 2014, at about 13 UTC, a dust storm arrived in Tehran as a severe hazard that caused in... more On 2 June 2014, at about 13 UTC, a dust storm arrived in Tehran as a severe hazard that caused injures, deaths, failures in power supply, and traffic disruption. Such an extreme event is not considered as common for the Tehran area, which has raised the question of the dust storm’s origin and the need for increasing citizens’ preparedness during such events. The analysis of the observational data and numerical simulations using coupled dust-atmospheric models showed that intensive convective activity occurred over the south and southwest of Tehran, which produced cold downdrafts and, consequently, high-velocity surface winds. Different dust source masks were used as an input for model hindcasts of the event (forecasts of the past event) to show the capability of the numerical models to perform high-quality forecasts in such events and to expand the knowledge on the storm’s formation and progression. In addition to the proven capability of the models, if engaged in operational use to...
Sand and dust storms (SDS) are an important threat to life, health, property, environment and eco... more Sand and dust storms (SDS) are an important threat to life, health, property, environment and economy in many countries, and play a significant role in different aspects of weather, climate and atmospheric chemistry. There is an increasing need for SDS accurate information and predictions to support early warning systems, and preparedness and mitigation plans. The present contribution introduces the current activities of the Regional Center for Northern Africa, Middle East and Europe of the WMO Sand and Dust Storm Warning Advisory and Assessment System (SDS-WAS). The Center has the mission is to enhance the ability of countries in the region to deliver timely and quality SDS forecasts, observations, information and knowledge to users through an international partnership of research and operational communities.
This work presents a comprehensive study of the different turbulence regimes observed during a ni... more This work presents a comprehensive study of the different turbulence regimes observed during a night (27-28 June 2006) at the CIBA (Research Centre for the Lower Atmosphere), located in the northern part of the Iberian Peninsula, in the Duero valley, over relatively flat and homogeneous terrain. The synoptic situation was dominated by all Atlantic anticyclone, with a weak northern flow over the area of interest. Nevertheless, the actual meteorological evolution was mainly driven by the mesoscale conditions,. The meteorological sequence of events were the irruption of a drainage flow, part of a nocturnal circulation established over the whole basin, and finally,. the onset; of a thick and dense fog layer that covered the region during several hours. These facts produced sudden changes both in the turbulence regime and in the stability of the lowest layers of the atmosphere, so that, three periods, with moderately stable, weakly stable and neutral stratification can be perfectly disti...
Ponencia presentada en: XXXIV Jornadas Científicas de la AME y el XVII Encuentro Hispano Luso de ... more Ponencia presentada en: XXXIV Jornadas Científicas de la AME y el XVII Encuentro Hispano Luso de Meteorología celebrado en Teruel, del 29 de febrero al 2 de marzo de 2016
En esta contribucion se estudia, a traves de las variables meteorologicas registradas en un labor... more En esta contribucion se estudia, a traves de las variables meteorologicas registradas en un laboratorio atmosferico de capa limite y mediante herramientas de analisis multiescala (la transformada wavelet y la descomposicion multiresolucion), la irrupcion de un flujo catabatico en una region muy llana y homogenea de la meseta castellana. Se muestran las analogias que pueden establecerse con los frentes meteorologicos clasicos, y se estudia la transformacion del regimen de turbulencia a la llegada del flujo catabatico, asi como la formacion de ondas de gravedad en la interfase con el aire mas calido situado por encima .
C. Camino, S. Alonso-Pérez, E. Terradellas, S. Rodríguez, A.J. Gomez-Pelaez, P.M. Romero-Campos, ... more C. Camino, S. Alonso-Pérez, E. Terradellas, S. Rodríguez, A.J. Gomez-Pelaez, P.M. Romero-Campos, Y. Hernández, S. Basart, J.M.Baldasano, E. Cuevas Izaña Atmospheric Research Centre, AEMET, Santa Cruz de Tenerife, Spain Institute of Environmental Assessment and Water Research (CSIC) Barcelona, Spain Spanish Meteorological Agency, AEMET, Barcelona, Spain Earth Sciences Department, Barcelona Supercomputing Center-Centro Nacional de Supercomputación (BSCCNS), Barcelona, Spain Environmental Modeling Laboratory, Technical University of Catalonia, Barcelona, Spain
Esta comunicacion muestra los resultados de aplicar un modelo meteorologico de mesoescala a alta ... more Esta comunicacion muestra los resultados de aplicar un modelo meteorologico de mesoescala a alta resolucion sobre una region centrada en el aeropuerto de Madrid-Barajas. Estos resultados confirman el modelo conceptual desarrollado por el INM que relaciona la formacion de vientos catabaticos y la existencia de lineas de convergencia de flujos en la zona, asi como su relacion con la formacion de niebla. [EN]This contribution shows the results of a mesoscale weather prediction model run at high resolution over a region centred at the Madrid-Barajas airport. These results confirm the goodness of a conceptual model developed by the INM, which relates katabatic winds with the existence of convergence lines over the area, as well as their relationship with fog formation.
Basicament, a I'hora de fer una prediccio del temps, el metcoroleg rep dos tipus d'inform... more Basicament, a I'hora de fer una prediccio del temps, el metcoroleg rep dos tipus d'informacio: dades d'observacio i resultats de models numerics que simulen l'evolucio de l'atmosfera. Aquest esquema simplificat es representat a la figura 1. Els metodes de treball varien notablement segons I'abast temporal do la prediccio. Seguint I'esquema de la figura 1, es pot afirmar que, com mes curt sigui el termini de la prediccio, mes imporrancia relativa tindra la informacio rebuda des del cami numero 2; es a dir, per a. una prediccio a curt termini es fonarnental l'obtencio i l'assimilacio de Jades d'observacio abundants, continues i precises.
On 2 June 2014, at about 13 UTC, a dust storm arrived in Tehran as a severe hazard that caused in... more On 2 June 2014, at about 13 UTC, a dust storm arrived in Tehran as a severe hazard that caused injures, deaths, failures in power supply, and traffic disruption. Such an extreme event is not considered as common for the Tehran area, which has raised the question of the dust storm’s origin and the need for increasing citizens’ preparedness during such events. The analysis of the observational data and numerical simulations using coupled dust-atmospheric models showed that intensive convective activity occurred over the south and southwest of Tehran, which produced cold downdrafts and, consequently, high-velocity surface winds. Different dust source masks were used as an input for model hindcasts of the event (forecasts of the past event) to show the capability of the numerical models to perform high-quality forecasts in such events and to expand the knowledge on the storm’s formation and progression. In addition to the proven capability of the models, if engaged in operational use to...
Sand and dust storms (SDS) are an important threat to life, health, property, environment and eco... more Sand and dust storms (SDS) are an important threat to life, health, property, environment and economy in many countries, and play a significant role in different aspects of weather, climate and atmospheric chemistry. There is an increasing need for SDS accurate information and predictions to support early warning systems, and preparedness and mitigation plans. The present contribution introduces the current activities of the Regional Center for Northern Africa, Middle East and Europe of the WMO Sand and Dust Storm Warning Advisory and Assessment System (SDS-WAS). The Center has the mission is to enhance the ability of countries in the region to deliver timely and quality SDS forecasts, observations, information and knowledge to users through an international partnership of research and operational communities.
This work presents a comprehensive study of the different turbulence regimes observed during a ni... more This work presents a comprehensive study of the different turbulence regimes observed during a night (27-28 June 2006) at the CIBA (Research Centre for the Lower Atmosphere), located in the northern part of the Iberian Peninsula, in the Duero valley, over relatively flat and homogeneous terrain. The synoptic situation was dominated by all Atlantic anticyclone, with a weak northern flow over the area of interest. Nevertheless, the actual meteorological evolution was mainly driven by the mesoscale conditions,. The meteorological sequence of events were the irruption of a drainage flow, part of a nocturnal circulation established over the whole basin, and finally,. the onset; of a thick and dense fog layer that covered the region during several hours. These facts produced sudden changes both in the turbulence regime and in the stability of the lowest layers of the atmosphere, so that, three periods, with moderately stable, weakly stable and neutral stratification can be perfectly disti...
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