Effect of radar rainfall time resolution on the predictive capability of a distributed hydrologic model

Atencia, A., L. Mediero, M. C. Llasat, and L. Garrote, 2011.

Abstract.

The performance of a hydrologic model depends on the rainfall input data, both spatially and temporally. As the spatial distribution of rainfall exerts a great influence on both runoff volumes and peak flows, the use of a distributed hydrologic model can improve the results in the case of convective rainfall in a basin where the storm area is smaller than the basin area. The aim of this study was to perform a sensitivity analysis of the rainfall time resolution on the results of a distributed hydrologic model in a flash-flood prone basin.

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El grup GAMA us desitja un Bon Nadal i un Bon Any Nou!
El grupo GAMA os desea una Feliz Navidad y Feliz Año Nuevo!
The GAMA team wishes you all a Merry Christmas and a Happy New Year!

Beca EURODYSSEE en SIG y Teledetección Ambiental a las Azores

Beca de prácticas profesionales de 6 meses  (15 de Febrero al 17 de Agosto del 2012) en Sistemas de Información Geografica (GIS) y Teledetección Ambiental, en Ponta Delgada (Isla de S. Miguel, Archipiélago de las Azores, Portugal) para becarios/becarias legalmente residentes en:

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Links de interés 2: Datos e información meteorológica, revistas y blogs

Datos e información meteorológica:

DRIHM Project: http://www.drihm.eu/

Servidor de información meteorológica: http://www.infomet.fcr.es/

Red Agrometeorológica de Catalunya: http://xarxes.meteocat.com/

Archive – Centre Météo UQAM-Montréal: http://meteocentre.com/archive/

Datos meteorológicos y plots de reanálisis NCEP/NCAR: http://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html#plot

Pagina con datos meteorológicos históricos, mapas, análisis, etc: http://www.novaweather.net/

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Links de interés 1: Universidades, organismos oficiales y otras organizaciones

Cursos, estudios, universidades y departamentos de meteorología, ciencias ambientales…

Universitat de Barcelona: http://www.ub.edu/web/ub/ca/

Grupo GAMA: http://gama.am.ub.es/castellano/castellano.htm

EDRINA (educación sobre riesgos naturales): http://gama.am.ub.es/edrina/

Máster Oficial en Meteorología: http://www.am.ub.es/mastermeteo/introduccio_cast.htm

Máster en Climatología Aplicada y Medios de Comunicación: http://gama.am.ub.es/master/

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La comunicació per a la sostenibilitat a Catalunya

Vine i participa a l’acte de cloenda del curs Comunicadors per al desenvolupament sostenible que tindrà lloc el proper dia 19 de desembre a les 18 h., al Col·legi de Periodistes (Rambla Catalunya, 10 de Barcelona).

Aquest és el tancament del curs després de quatre mesos intensos d’una proposta formativa, impulsada des del Centre UNESCO de Catalunya amb el suport del CADS. L’acte de cloenda està obert a tot el públic interessat en la comunicació i el desenvolupament sostenible.

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Testing MOS precipitation downscaling for ENSEMBLES regional climate models over Spain

Abstract:

Model Output Statistics (MOS) has been recently proposed as an alternative to the standard perfect prognosis statistical downscaling approach for Regional Climate Model (RCM) outputs. In this case, the model output for the variable of interest (e.g. precipitation) is directly downscaled using observations. In this paper we test the performance of a MOS implementation of the popular analog methodology (referred to as MOS analog) applied to downscale daily precipitation outputs over Spain. To this aim, we consider the state‐of‐the‐art ERA40‐driven RCMs provided by the EU‐funded ENSEMBLES project and the Spain02 gridded observations data set, using the common period 1961–2000. The MOS analog method improves the representation of the mean regimes, the annual cycle, the frequency and the extremes of precipitation for all RCMs, regardless of the region and the model reliability (including relatively low‐performing models), while preserving the daily accuracy. The good performance of the method in this complex climatic region suggests its potential transferability to other regions. Furthermore, in order to test the robustness of the method in changing climate conditions, a cross‐validation in driest or wettest years was performed. The method improves the RCM results in both cases, especially in the former.

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Using Lightning Data to Better Understand and Predict Flash Floods in the Mediterranean

Abstract:

One of the costliest natural hazards around the globe is flash floods, resulting from localized intense convective precipitation over short periods of time. Since intense convective rainfall (especially over the continents) is well correlated with lightning activity in these storms, a European Union FP6 FLASH project was realized from 2006 to 2010, focusing on using lightning observations to better understand and predict convective storms that result in flash floods. As part of the project, 23 case studies of flash floods in the Mediterranean region were examined. For the analysis of these storms, lightning data were used together with rainfall estimates in order to understand the storms’ development and electrification processes. In addition, these case studies were simulated using mesoscale meteorological models to better understand the local and synoptic conditions leading to such intense and damaging storms. As part of this project, tools for short-term predictions (nowcasts) of intense convection across the Mediterranean and Europe, and long-term forecasts (a few days) of the likelihood of intense convection, were developed and employed. The project also focused on educational outreach through a special Web site http://flashproject.org supplying real-time lightning observations, real-time experimental nowcasts, medium-range weather forecasts and educational materials. While flash floods and intense thunderstorms cannot be prevented, long-range regional lightning networks can supply valuable data, in real time, for warning the public, end-users and stakeholders of imminent intense rainfall and possible flash floods.

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The FLASH Project: using lightning data to better understand and predict flash floods

Abstract:

The FLASH project was implemented from 2006 to 2010 under the EU FP6 framework. The project focused on using lightning observations to better understand and predict convective storms that result in flash floods. As part of the project 23 case studies of flash floods in the Mediterranean region were examined. For the analysis of these storms lightning data from the ZEUS network were used together with satellite derived rainfall estimates in order to understand the storm development and electrification. In addition, these case studies were simulated using mesoscale meteorological models to better understand the meteorological and synoptic conditions leading up to these intense storms. As part of this project tools for short term predictions (nowcasts) of intense convection across the Mediterranean and Europe, and long term forecasts (a few days) of the likelihood of intense convection were developed. The project also focused on educational outreach through our website http://flashproject.org supplying real time lightning observations, real time experimental nowcasts, forecasts and educational materials. While flash floods and intense thunderstorms cannot be prevented as the climate changes, long-range regional lightning networks can supply valuable data, in real time, for warning end-users and stakeholders of imminent intense rainfall and possible flash floods.

Trends in indices of daily precipitation extremes in Catalonia (NE Spain), 1951–2003

Abstract:

The aim of this paper is to quantitatively characterize the climatology of daily precipitation indices in Catalonia (northeastern Iberian Peninsula) from 1951 to 2003. This work has been performed analyzing a subset of the ETCCDI (Expert Team on Climate Change Detection and Indices) precipitation indices calculated from a new interpolated dataset of daily precipitation, namely SPAIN02, regular at 0.2° horizontal resolution (around 20 km) and from two high-quality stations: the Ebro and Fabra observatories.

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