Intense and Extreme Wind Speeds Observed by Anemometer and Seismic Networks: An Eastern U.S. Case Study
Intense and Extreme Wind Speeds Observed by Anemometer and Seismic Networks: An Eastern U.S. Case Study
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风速计和地震台网观测到的强风和极端风速：美国东部案例研究
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
R. Barthelmie
中科院分区：
文献类型：
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作者：
S. Pryor;Robert Conrick;C. Miller;J. Tytell;R. Barthelmie
极端风事件的规模和强度与确定对基础设施和自然及管理的生态系统的影响具有巨大的相关性。本报告的分析显示了以下情况。1)在美国东部，超过特定站点第95百分位数的风速在长达1000公里的距离上是一致的，这意味着高风速的驱动因素在天气尺度上是明显的。2)虽然与热带气旋相关的冷锋是高风速事件的主要原因，但最大持续风速和阵风风速仅弱依赖于穿过锋面的近地表水平温度梯度。3)美国东部阵风因子的平均值为1.57，符合对数正态概率分布，最大观测阵风因子与持续风速之间的关系符合幂律，系数分别为5.91和-0.499。即使在发生强烈风速时有连贯性...
AbstractThe scale and intensity of extreme wind events have tremendous relevance to determining the impact on infrastructure and natural and managed ecosystems. Analyses presented herein show the following. 1) Wind speeds in excess of the station-specific 95th percentile are coherent over distances of up to 1000 km over the eastern United States, which implies that the drivers of high wind speeds are manifest at the synoptic scale. 2) Although cold fronts associated with extratropical cyclones are a major cause of high–wind speed events, maximum sustained and gust wind speeds are only weakly dependent on the near-surface horizontal temperature gradient across the front. 3) Gust factors (GF) over the eastern United States have a mean value of 1.57 and conform to a lognormal probability distribution, and the relationship between maximum observed GF and sustained wind speed conforms to a power law with coefficients of 5.91 and −0.499. Even though there is coherence in the occurrence of intense wind speeds at...