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Wind stilling ceased in the Iberian Peninsula since the 2000s



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Utrabo Carazo, Eduardo and Azorín Molina, César and Serrano Mendoza, Encarnación and Aguilar, Enric and Brunet, Manola and Guijarro, José A. (2022) Wind stilling ceased in the Iberian Peninsula since the 2000s. Atmospheric research, 272 . ISSN 0169-8095

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Official URL: http://dx.doi.org/10.1016/j.atmosres.2022.106153


This study analyses quality controlled and homogenized near-surface wind speed series (SWS) at 87 meteorological stations distributed across Spain and Portugal for 1961-2019. Multidecadal variability analysis of both mean and gusts SWS confirms for the first time in the region the cessation of the stilling (decline of SWS) and a possible weak reversal phenomenon (increase in SWS) in the last decades, varying its onset from 1999 to 2018, depending on the season and variable. Different atmospheric circulation drivers are evaluated to explain the stilling and reversal phenomena. Among the chosen teleconnection indices, the Western Mediterranean Oscillation index (WeMOi) is the one that presents the highest (positive) correlation with SWS, although the correlation (negative) with the North Atlantic Oscillation index and the Mediterranean Oscillation index in winter is also statistically significant (p < 0.05). Results show that the interannual variability of the WeMOi could exert a strong influence on both the stilling and reversal phenomena, as it displays statistically significant negative trends for 1961-2010 and positive ones (non-significant) for 2010-2019, in agreement with the observed SWS trends. The use of the Jenkinson and Collison weather type classification reveals the marked influence of certain weather types in modulating SWS changes (i.e., west, northwest, and anticyclonic types). We proposed the increase in atmospheric thermal stability and the northward shift of the jet stream as principal causes of the stilling phenomenon in this region. Our results improve our understanding of wind changes, and highlight the importance of regional assessments to discern their socioeconomic and environmental impacts.

Item Type:Article
Additional Information:

© 2022 The Authors. Published by Elsevier B.V. E.U.-C. was supported by the FPI fellowship (PRE2019-090148), and C.A.-M. by the Ramón y Cajal fellowship (RYC-2017-22830). This study was conducted in the framework of the IBER-STILLING project RTI2018- 095749-A-100 (MCIU/AEI/FEDER,UE), the VENTS project AICO/2021/ 023 (GVA) and the CSIC Interdisciplinary Thematic Platform (PTI) Clima. (PTI-CLIMA). We acknowledge the anonymous reviewers for their detailed and helpful comments to the original manuscript.

Uncontrolled Keywords:Northern-hemisphere; Speed trends; Atmospheric circulation; Tropical expansion; Climate-change; Variability; China; Homogenization; Recovery; Models
Subjects:Sciences > Physics > Geophysics
ID Code:75155
Deposited On:21 Oct 2022 07:20
Last Modified:07 Nov 2022 08:36

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