http://hdl.handle.net/20.500.11765/12295 2026-04-19T15:42:07Z http://hdl.handle.net/20.500.11765/12872 Título : Verification of C3S Seasonal Forecasting Systems over Europe and the Mediterranean region Autor : Sánchez García, Eroteida; Voces Aboy, José; Rodríguez Camino, Ernesto Descripción : Póster presentado en: EMS Annual Meeting: European Conference for Applied Meteorology and Climatology celebrado del 9 al 13 de septiembre de 2017 en Copenhague, Dinamarca. 2019-01-01T00:00:00Z http://hdl.handle.net/20.500.11765/12494 Título : Real-time Mediterranean cyclone prediction from NWP models Autor : Picornell, María Ángeles Descripción : Póster presentado en: EMS Annual Meeting: European Conference for Applied Meteorology and Climatology celebrado del 9 al 13 de septiembre de 2017 en Copenhague, Dinamarca. 2019-01-01T00:00:00Z http://hdl.handle.net/20.500.11765/12491 Título : Regionally improved seasonal forecast of precipitation through best estimation of winter NAO [Póster] Autor : Sánchez García, Eroteida; Voces Aboy, José; Navascués, Beatriz; Rodríguez Camino, Ernesto Descripción : Póster presentado en: EMS Annual Meeting - European Conference for Applied Meteorology and Climatology 2018, celebrado en Budapest del 3 al 7 de septiembre de 2018. 2018-01-01T00:00:00Z http://hdl.handle.net/20.500.11765/11988 Título : Variability of winter haze over the Beijing-Tianjin-Hebei region tied to wind speed in the lower troposphere and particulate sources [Póster] Autor : Zhang, Gangfeng; Shi, Peijun; Chen, Deliang; Kong, Feng; Azorín Molina, César; Guijarro Pastor, José Antonio Resumen : This study analyzes the variability of winter haze days and visibility in the Beijing-Tianjin-Hebei (BTH) region in relation to wind speed changes in the lower troposphere and emissions for 1961-2014. Daily surface meteorological data, NCEP/NCAR atmospheric reanalysis data, and fossil fuel emission data are used in this research. The results reveal a significant increase in winter haze days of +0.8 days decade-1 (p<0.01), and a subsequent decline in visibility of-1.56 km decade-1 (p<0.01). Most interestingly, an accelerated increase in haze days was observed for the last 11-year period (+8.3 days decade-1) of the study (2004-2014). The increase of winter haze occurrence and decrease in visibility are partly attributed to: the significant (p<0.01) declining trend of mean wind speed at the near-surface (-0.19 m s-1 decade-1), 925hPa (-0.23 m s-1 decade-1), and 850hPa (-0.21 m s-1 decade-1); the vertical shear of wind between 1000hPa and 850hPa (-0.07 m s-1 decade-1); and, the declining (dust storm frequency as a proxy,-0.41 days dec-1) surrounding particulate sources and increasing fossil fuel emissions (total carbon emission as a proxy, +4820.6 metric tons dec-1). Specifically, wind speed changes in the lower troposphere explain 41.3% of winter haze days and 71.2% of the visibility variance. These are extended to 51.7% and 81.6% respectively when combined with natural (dust storm frequency) and anthropogenic (fossil fuel emissions) particulate sources. Therefore, the analyses show that wind speed changes in the lower troposphere, together with the varied natural and anthropogenic sources of particulates, play a key role in modulating winter haze and visibility conditions in the BTH area. Descripción : Póster presentado en: EMS Annual Meeting - European Conference for Applied Meteorology and Climatology 2018, celebrado en Budapest del 3 al 7 de septiembre de 2018. 2018-01-01T00:00:00Z