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Trends of daily peak wind gusts in Spain and Portugal, 1961–2014
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dc.contributor.authorAzorín Molina, Césares_ES
dc.contributor.authorGuijarro Pastor, José Antonioes_ES
dc.contributor.authorMcVicar, Tim R.es_ES
dc.contributor.authorVicente Serrano, Sergio Martínes_ES
dc.contributor.authorChen, Delianges_ES
dc.contributor.authorJerez, Soniaes_ES
dc.contributor.authorEspírito Santo, ‪Fátimaes_ES
dc.identifier.citationJournal of Geophysical Research: Atmospheres. 2016, 121(3), p. 1059-1078es_ES
dc.description.abstractGiven the inconsistencies of wind gust trends under the widespread decline in near-surface wind speed (stilling), our study aimed to assess trends of observed daily peak wind gusts (DPWG) across Spain and Portugal for 1961–2014 by analyzing trends of (i) the frequency (90th percentile) and (ii) the magnitude (wind speed maxima) of DPWG. Wind gust series were homogenized on a daily basis, using MM5-simulated series as reference, resulting in 80 suitable station-based data sets. The average DPWG 90th percentile frequency declined by _1.49 d decade_1 (p<0.05) annually. This showed marked seasonal differences: decreasing in winter (_0.75 d decade_1; p<0.05) and increasing in summer (+0.18 d decade_1; p>0.10). A negligible trend was calculated for the annual magnitude of DPWG (_0.005ms_1 decade_1; p>0.10), with distinct seasonality: declining in winter (_0.168ms_1 decade_1; p<0.10) and increasing in summer (+0.130ms_1 decade_1; p<0.05). Combined, these results reveal less frequent and declining DPWG during the cold semester (November–April) and more frequent and increasing DPWG during the warm semester (May–October). Large-scale atmospheric changes such as the North Atlantic Oscillation Index (negative correlations ~_0.4–_0.6; p<0.05) and the Jenkinson and Collison scheme (positive correlations mainly with Westerly regime: ~+0.5–0.6; p<0.05) partly account for the decadal fluctuations of both frequency and magnitude of DPWG, particularly in winter. However, the North Atlantic Oscillation index-DPWG relationships are smaller in spring, summer, and autumn (~_0.1–_0.2; p>0.10), especially for the frequency, suggesting the role of local-to-mesoscale drivers.es_ES
dc.publisherAmerican Geophysical Uniones_ES
dc.subjectDaily peak wind gustses_ES
dc.subjectWind speedes_ES
dc.titleTrends of daily peak wind gusts in Spain and Portugal, 1961–2014es_ES
Appears in Collections:Artículos científicos 2015-2018

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