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Recent trends in wi...
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Azorin-Molina, CesarGothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
(författare)
Recent trends in wind speed across Saudi Arabia, 1978-2013: a break in the stilling
- Artikel/kapitelEngelska2018
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2018-01-29
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Wiley,2018
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electronicrdacarrier
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LIBRIS-ID:oai:gup.ub.gu.se/268633
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https://gup.ub.gu.se/publication/268633URI
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https://doi.org/10.1002/joc.5423DOI
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We analyse recent trends and variability of observed near-surface wind speed from 19 stations across Saudi Arabia (SA) for 1978-2013. The raw wind speed data set was subject to a robust homogenization protocol, and the stations were then classified under three categories: (1) coast, (2) inland and (3) mountain stations. The results reveal a statistically significant (p<0.05) reduction of wind speed of -0.058m s(-1) dec(-1) at annual scale across SA, with decreases in winter (-0.100m s(-1) dec(-1)) and spring (-0.066m s(-1) dec(-1)) also detected, being non-significant in summer and autumn. The coast, inland and mountain series showed similar magnitude and significance of the declining trends across all SA series, except for summer when a decoupled variability and opposite trends of wind speed between the coast and inland series (significant declines: -0.101m s(-1) dec(-1) and -0.065m s(-1) dec(-1), respectively) and the high-elevation mountain series (significant increase: +0.041m s(-1) dec(-1)) were observed. Even though wind speed declines dominated across much of the country throughout the year, only a small number of stations showed statistically significant negative trends in summer and autumn. Most interestingly, a break in the stilling was observed in the last 12-year (2002-2013) period (+0.057m s(-1) dec(-1); not significant) compared to the significant slowdown detected in the previous 24-year (1978-2001) period (-0.089m s(-1) dec(-1)). This break in the slowdown of winds, even followed by a non-significant recovery trend, occurred in all seasons (and months) except for some winter months. Atmospheric circulation plays a key role in explaining the variability of winds, with the North Atlantic Oscillation positively affecting the annual wind speed, the Southern Oscillation displaying a significant negative relationship with winds in winter, spring and autumn, and the Eastern Atlantic negatively modulating winds in summer.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Rehman, S.
(författare)
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Guijarro, J. A.
(författare)
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McVicar, T. R.
(författare)
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Minola, LorenzoGothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences(Swepub:gu)xminol
(författare)
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Chen, Deliang,1961Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences(Swepub:gu)xchede
(författare)
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Vicente-Serrano, S. M.
(författare)
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Göteborgs universitetInstitutionen för geovetenskaper
(creator_code:org_t)
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Ingår i:International Journal of Climatology: Wiley380899-8418
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