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Variability of daily maximum wind speed across China, 1975–2016: an examination of likely causes
Title: Variability of daily maximum wind speed across China, 1975–2016: an examination of likely causes
Authors: Zhang, GangfengAzorín Molina, CésarChen, DeliangGuijarro Pastor, José Antonio ORCID RESEARCHERID Autor AEMETKong, FengMinola, LorenzoMcVicar, Tim R.Son, Seok-WooShi, Peijun
Keywords: Climate change; Annual variations; Seasonal variability; Trends
Issue Date: 2020
Publisher: American Meteorological Society
Citation: Journal of Climate. 2020, 33, p. 2793–2816
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Abstract: Assessing change in daily maximum wind speed and its likely causes is crucial for many applications such as wind power generation and wind disaster risk governance. Multidecadal variability of observed near-surface daily maximum wind speed (DMWS) from 778 stations over China is analyzed for 1975–2016. A robust homogenization protocol using the R package Climatol was applied to the DMWS observations. The homogenized dataset displayed a significant (p < 0.05) declining trend of −0.038 m s−1 decade−1 for all China annually, with decreases in winter (−0.355 m s−1 decade−1, p < 0.05) and autumn (−0.108 m s−1 decade−1; p < 0.05) and increases in summer (+0.272 m s−1 decade−1, p < 0.05) along with a weak recovery in spring (+0.032 m s−1 decade−1; p > 0.10); that is, DMWS declined during the cold semester (October–March) and increased during the warm semester (April–September). Correlation analysis of the Arctic Oscillation, the Southern Oscillation, and the west Pacific modes exhibited significant correlation with DMWS variability, unveiling their complementarity in modulating DMWS. Further, we explored potential physical processes relating to the atmospheric circulation changes and their impacts on DMWS and found that 1) overall weakened horizontal airflow [large-scale mean horizontal pressure gradient (from −0.24 to +0.02 hPa decade−1) and geostrophic wind speed (from −0.6 to +0.6 m s−1 decade−1)], 2) widely decreased atmospheric vertical momentum transport [atmospheric stratification thermal instability (from −3 to +1.5 decade−1) and vertical wind shear (from −0.4 to +0.2 m s−1 decade−1)], and 3) decreased extratropical cyclones frequency (from −0.3 to 0 month decade−1) are likely causes of DMWS change.
Sponsorship : This study was supported by the National Natural Science Foundation of China (Grant 41621061), the National Key Research and Development Program–Global Change and Mitigation Project (Grant 2016YFA0602404), funding from STINT (CH2015-6226), and the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement 703733 (STILLING project). This work has been also supported by the VR project (2017-03780) funded by the Swedish Research Council and Ramon y Cajal fellowship (RYC-2017-22830) and Grant RTI2018-095749-A-I00 (MCIU/AEI/FEDER, UE).
ISSN: 0894-8755
Appears in Collections:Artículos científicos 2019-2022

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