| DOI: | 10.1002/joc.6012
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| Scopus记录号: | 2-s2.0-85061439919
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| 论文题名: | Statistical and synoptic analyses of offshore wind variations |
| 作者: | Bakri T.; Jackson P.
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| 刊名: | International Journal of Climatology
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| ISSN: | 8998418
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| 出版年: | 2019
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| 语种: | 英语
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| 英文关键词: | extreme value analysis
; k-means
; persistence
; spatial coherency
; synoptic climatology
; wind extrapolation
; wind power
; wind variability
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| Scopus关键词: | Buoys
; Climatology
; Extrapolation
; K-means clustering
; Location
; Offshore oil well production
; Speed
; Wind
; Wind power
; Wind turbines
; Extreme value analysis
; K-means
; persistence
; Spatial coherency
; Synoptic climatology
; Wind variabilities
; Principal component analysis
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| 英文摘要: | In this study, variations of offshore wind speed in the northern and central coasts of British Columbia are examined using wind observations from nine buoys distributed in the region. Wind speeds from all buoys are extrapolated to the standard (10 m) wind measurement height as well as to the wind turbine hub height (100 m) using Monin–Obukhov similarity theory. Sustained winds above several thresholds are analysed and values of 50 and 100-year return extreme wind speed levels are calculated for all locations. The percentage of sustained winds between the wind turbine cut-in and cut-out wind speed thresholds at 100 m indicates short periods without power generation. The highest 50 and 100-year return level values are found at locations west of Haida Gwaii, while the lowest values are calculated at the most southern and eastern locations. Spatial coherency analysis of high wind speeds between all locations shows high same-day coherency ratios between all buoys located offshore of the mainland coast, which emphasizes the importance of the atmospheric circulation at the synoptic-scale as the main driver of intense wind events; consequently, a synoptic-scale circulation analysis is carried out by applying principal components analysis and k-means clustering, and then relating the calculated synoptic patterns to some of the previously classified wind categories. The synoptic-scale circulation analysis reveals that high wind speed events are mainly associated with a system of low pressure located west or northwest of the study region, which induces intense southerly to southeasterly winds. Low wind speeds are often associated with a high-pressure system (Pacific High) originating southwest of the region that mainly predominates during the summer. © 2019 Royal Meteorological Society |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/116626
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | Natural Resources and Environmental Studies Institute, University of Northern British Columbia, Prince George, BC, Canada
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| Recommended Citation: | |
Bakri T.,Jackson P.. Statistical and synoptic analyses of offshore wind variations[J]. International Journal of Climatology,2019-01-01
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