| DOI: | 10.1175/2011JCLI4198.1
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| Scopus记录号: | 2-s2.0-84855265984
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| 论文题名: | Long-term wind speed trends over Australia |
| 作者: | Troccoli A.; Muller K.; Coppin P.; Davy R.; Russell C.; Hirsch A.L.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2012
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| 卷: | 25, 期:1 | | 起始页码: | 170
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| 结束页码: | 183
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| 语种: | 英语
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| Scopus关键词: | 850-hPa
; Atmospheric circulation
; Australia
; Circulation changes
; Climate sensitivity
; Geopotentials
; In-line
; Light wind
; Mean sea level pressures
; Mean-winds
; Reanalysis
; Strong winds
; Time-scales
; Trends
; Wind speed
; Climatology
; Sea level
; Wind
; Wind power
; Wind effects
; accuracy assessment
; atmospheric circulation
; estimation method
; observational method
; qualitative analysis
; sea level pressure
; trend analysis
; wind field
; wind velocity
; Australia
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| 英文摘要: | Accurate estimates of long-term linear trends of wind speed provide a useful indicator for circulation changes in the atmosphere and are invaluable for the planning and financing of sectors such as wind energy. Here a large number of wind observations over Australia and reanalysis products are analyzed to compute such trends. After a thorough quality control of the observations, it is found that the wind speed trends for 1975-2006 and 1989-2006 over Australia are sensitive to the height of the station: they are largely negative for the 2-m data but are predominantly positive for the 10-m data. The mean relative trend at 2 m is -0.10 ± 0.03% yr -1 (-0.36 ± 0.04% yr -1) for the 1975-2006 (1989-2006) period, whereas at 10 m it is 0.90 ± 0.03% yr -1 (0.69 ± 0.04% yr -1) for the 1975-2006 (1989-2006) period. Also, at 10 m light winds tend to increase more rapidly than the mean winds, whereas strong winds increase less rapidly than the mean winds; at 2 m the trends in both light and strong winds vary in line with the mean winds. It was found that a qualitative link could be established between the observed features in the linear trends and some atmospheric circulation indicators (mean sea level pressure, wind speed at 850 hPa, and geopotential at 850 hPa), particularly for the 10-m observations. Further, the magnitude of the trend is also sensitive to the period selected, being closer to zero when a very long period, 1948-2006, is considered. As a consequence, changes in the atmospheric circulation on climatic time scales appear unlikely. © 2012 American 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/52603
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | CSIRO Marine and Atmospheric Research, Canberra, ACT, Australia; Monash University, Melbourne, VIC, Australia
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| Recommended Citation: | |
Troccoli A.,Muller K.,Coppin P.,et al. Long-term wind speed trends over Australia[J]. Journal of Climate,2012-01-01,25(1)
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