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Self-Similar Characteristic for the Ramp Structures of Wind Speed
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作者 SONG Zong-Peng HU Fei +1 位作者 XU Jing-Jing CHENG Xue-Ling 《Atmospheric and Oceanic Science Letters》 CSCD 2014年第4期320-323,共4页
Time series of wind speed are composed of large and small ramp structures. Data analysis reveals a power law relation between the linear slope of ramp structures and the time scale. This suggests that these ramp struc... Time series of wind speed are composed of large and small ramp structures. Data analysis reveals a power law relation between the linear slope of ramp structures and the time scale. This suggests that these ramp structures of wind speed have a self-similar characteristic. The lower limit of the self-similar scale range was 2 s. The upper limit is unexpectedly large at 27 rain. Data are collected from grassland, city, and lake areas. Although these data have different underlying surfaces, all of them clearly show a power law relation, with slight differences in their power exponents. 展开更多
关键词 ramp structure SELF-SIMILARITY power law time series of wind speed
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