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Anomalies, trends and variability in atmospheric fields related to hailstorms in north‐eastern Spain
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dc.contributor.authorGarcía Ortega, Eduardoes_ES
dc.contributor.authorHermida González, Lucíaes_ES
dc.contributor.authorHierro, R.es_ES
dc.contributor.authorMerino Suances, Andréses_ES
dc.contributor.authorGascón, Estíbalizes_ES
dc.contributor.authorFernández-González, Sergioes_ES
dc.contributor.authorSánchez Gómez, José Luises_ES
dc.contributor.authorLópez Campano, Lauraes_ES
dc.identifier.citationInternational Journal of Climatology. 2014, 34(11), p. 3251-3263es_ES
dc.description.abstractHailstorms have become a serious meteorological risk in mid-latitude countries because of their small-scale development and short time span, and their forecasting remains problematic. Moreover, the lack of reliable hailstorm databases is an important handicap for Numerical Weather Prediction (NWP) model validation, time trend studies and establishment of hailstorm relationships with global warming and climate change. However, this can be overcome by ascertaining physical relationships between favourable synoptic patterns and mesoscale trigger factors for hailstorm development in a local study area. North-eastern Spain is one of the European regions with largest number of hailstorm days (HD) observed in the summer. Since 2001, from May through September, reliable databases of hailstorm occurrence in the middle Ebro Valley have been constructed, which include intensity, temporal frequency and spatial coordinate data. June and July 2006 had the largest number of HD in 2001–2010. With the objective of analysing meteorological factors responsible for this anomaly, atmospheric patterns at low and mid-tropospheric levels were studied. We determined a set of special synoptic configurations, with an evident deviation from climatic values generating anomalies of 850 hPa temperature relative to the characteristic values of 2001–2010 and 1950–2010. An analysis of these anomalies detected a positive trend of 850 hPa temperature and geopotential height in the western Mediterranean area. As a consequence, the characteristic synoptic circulation has changed since 1950, towards low-level patterns favouring adequate thermodynamic environments for hailstorm development in north-eastern Spain. Finally, after a cluster analysis, we studied periodicities in the monthly 850 hPa temperature field to improve knowledge for seasonal forecasting of hailstorms.es_ES
dc.description.sponsorshipThe study was supported by the Plan Nacional de I+D of Spain through grant CGL2010-15930 and the Junta de Castilla y León through grant LE176A11-2.es_ES
dc.publisherRoyal Meteorological Society; Wileyes_ES
dc.rightsLicencia CC: Reconocimiento CC BYes_ES
dc.subjectWestern Mediterraneanes_ES
dc.subjectMorlet transformes_ES
dc.titleAnomalies, trends and variability in atmospheric fields related to hailstorms in north‐eastern Spaines_ES
Appears in Collections:Artículos científicos 2010-2014

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