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A Decline of Observ...
A Decline of Observed Daily Peak Wind Gusts with Distinct Seasonality in Australia, 1941-2016
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Azorin-Molina, C. (author)
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McVicar, T. R. (author)
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Guijarro, J. A. (author)
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Trewin, B. (author)
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Frost, A. J. (author)
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Zhang, G. F. (author)
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Minola, L. (author)
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Son, S. W. (author)
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Deng, K. Q. (author)
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- Chen, Deliang, 1961 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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(creator_code:org_t)
- American Meteorological Society, 2021
- 2021
- English.
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In: Journal of Climate. - : American Meteorological Society. - 0894-8755 .- 1520-0442. ; 34:8, s. 3103-3127
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Abstract
Subject headings
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- Wind gusts represent one of the main natural hazards due to their increasing socioeconomic and environmental impacts on, for example, human safety, maritime-terrestrial-aviation activities, engineering and insurance applications, and energy production. However, the existing scientific studies focused on observed wind gusts are relatively few compared to those on mean wind speed. In Australia, previous studies found a slowdown of near-surface mean wind speed, termed "stilling," but a lack of knowledge on the multidecadal variability and trends in the magnitude (wind speed maxima) and frequency (exceeding the 90th percentile) of wind gusts exists. A new homogenized daily peak wind gusts (DPWG) dataset containing 548 time series across Australia for 1941-2016 is analyzed to determine long-term trends in wind gusts. Here we show that both the magnitude and frequency of DPWG declined across much of the continent, with a distinct seasonality: negative trends in summer-spring-autumn and weak negative or nontrending (even positive) trends in winter. We demonstrate that ocean-atmosphere oscillations such as the Indian Ocean dipole and the southern annular mode partly modulate decadal-scale variations of DPWG. The long-term declining trend of DPWG is consistent with the "stilling" phenomenon, suggesting that global warming may have reduced Australian wind gusts.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- speed trends
- homogenization
- portugal
- sweden
- spain
- Meteorology & Atmospheric Sciences
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Azorin-Molina, C ...
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McVicar, T. R.
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Guijarro, J. A.
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Trewin, B.
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Frost, A. J.
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Zhang, G. F.
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show more...
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Minola, L.
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Son, S. W.
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Deng, K. Q.
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Chen, Deliang, 1 ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Journal of Clima ...
- By the university
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University of Gothenburg