Global patterns of offshore wind variability

Abstract Using the 40‐year hourly gridded ERA5 reanalysis, we study the offshore patterns of wind variability using the probability density function (PDF) and the power spectral density (PSD). To summarize wind variability, we compute the Weibull parameters from the PDF and the PSD for six spectral...

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Autores principales:	Chris G. West, Ronald B. Smith
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	global intermittency offshore wind storms Weibull wind power Renewable energy sources TJ807-830
Acceso en línea:	https://doaj.org/article/a2dc3c40e28d4ba7b4b2253cf301af82
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spelling	oai:doaj.org-article:a2dc3c40e28d4ba7b4b2253cf301af822021-11-26T14:02:23ZGlobal patterns of offshore wind variability1099-18241095-424410.1002/we.2641https://doaj.org/article/a2dc3c40e28d4ba7b4b2253cf301af822021-12-01T00:00:00Zhttps://doi.org/10.1002/we.2641https://doaj.org/toc/1095-4244https://doaj.org/toc/1099-1824Abstract Using the 40‐year hourly gridded ERA5 reanalysis, we study the offshore patterns of wind variability using the probability density function (PDF) and the power spectral density (PSD). To summarize wind variability, we compute the Weibull parameters from the PDF and the PSD for six spectral bands: interannual, annual, multimonth, storm, diurnal, and semidiurnal. We characterize the storm spectral peak using a Gaussian function in log10 frequency space. These parameters are plotted along two pole‐to‐pole transects through the Atlantic Ocean at 25°W and the Pacific Ocean at 170°W longitude and at 16 current and proposed offshore wind sites. We test the idea that coastal and open‐ocean wind statistics may be described by a single set of meridional profiles. In mid‐latitudes, the storm band variance exceeding 20 m2 s−2 dominates. The Weibull shape parameter is close to k=2. The storm interval varies from 4 to 7 days depending on location. In the Northern Hemisphere only, the annual variance is significant, exceeding 3 m2 s−2. In the equatorial region, we find steadier winds with small storm variance less than 3 m2 s−2. The Weibull shape parameter is k=4 or greater, suggesting the possibility of a high capacity factor there. The storm interval can exceed 15 days. The equatorial zone has an annual wind variance reaching 2 m2 s−2, comparable to the storm variance. In the tropical Pacific, we find interannual variance associated with El Niño‐Southern Oscillation (ENSO). Semidiurnal variance is detected in the tropics from the atmospheric tide.Chris G. WestRonald B. SmithWileyarticleglobalintermittencyoffshore windstormsWeibullwind powerRenewable energy sourcesTJ807-830ENWind Energy, Vol 24, Iss 12, Pp 1466-1481 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	global intermittency offshore wind storms Weibull wind power Renewable energy sources TJ807-830
spellingShingle	global intermittency offshore wind storms Weibull wind power Renewable energy sources TJ807-830 Chris G. West Ronald B. Smith Global patterns of offshore wind variability
description	Abstract Using the 40‐year hourly gridded ERA5 reanalysis, we study the offshore patterns of wind variability using the probability density function (PDF) and the power spectral density (PSD). To summarize wind variability, we compute the Weibull parameters from the PDF and the PSD for six spectral bands: interannual, annual, multimonth, storm, diurnal, and semidiurnal. We characterize the storm spectral peak using a Gaussian function in log10 frequency space. These parameters are plotted along two pole‐to‐pole transects through the Atlantic Ocean at 25°W and the Pacific Ocean at 170°W longitude and at 16 current and proposed offshore wind sites. We test the idea that coastal and open‐ocean wind statistics may be described by a single set of meridional profiles. In mid‐latitudes, the storm band variance exceeding 20 m2 s−2 dominates. The Weibull shape parameter is close to k=2. The storm interval varies from 4 to 7 days depending on location. In the Northern Hemisphere only, the annual variance is significant, exceeding 3 m2 s−2. In the equatorial region, we find steadier winds with small storm variance less than 3 m2 s−2. The Weibull shape parameter is k=4 or greater, suggesting the possibility of a high capacity factor there. The storm interval can exceed 15 days. The equatorial zone has an annual wind variance reaching 2 m2 s−2, comparable to the storm variance. In the tropical Pacific, we find interannual variance associated with El Niño‐Southern Oscillation (ENSO). Semidiurnal variance is detected in the tropics from the atmospheric tide.
format	article
author	Chris G. West Ronald B. Smith
author_facet	Chris G. West Ronald B. Smith
author_sort	Chris G. West
title	Global patterns of offshore wind variability
title_short	Global patterns of offshore wind variability
title_full	Global patterns of offshore wind variability
title_fullStr	Global patterns of offshore wind variability
title_full_unstemmed	Global patterns of offshore wind variability
title_sort	global patterns of offshore wind variability
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/a2dc3c40e28d4ba7b4b2253cf301af82
work_keys_str_mv	AT chrisgwest globalpatternsofoffshorewindvariability AT ronaldbsmith globalpatternsofoffshorewindvariability
_version_	1718409309377789952

Global patterns of offshore wind variability

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