The Enhanced Fujita Scale: Development and Implementation

The Enhanced Fujita Scale: Development and Implementation
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增强型藤田量表：开发和实施

DOI：
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发表时间：
2009
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影响因子：
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通讯作者：
J. A. Womble
J. A. Womble
中科院分区：
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文献类型：
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作者：
J. Mcdonald;K. Mehta;D. A. Smith;J. A. Womble

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最初的藤田尺度（F尺度）是通过将损害的外观与风速联系起来来估计龙卷风和飓风强度的一种手段。这些关系是基于藤田博士的丰富经验，但从未得到独立证实。此外，施工质量的重要性没有得到认识，损坏指标的数量也有限。德克萨斯理工大学的风力科学与工程小组同意领导一项改进原始规模的工作。改进后的等级被称为增强型藤田等级（EF等级），定义了28个损害指标和每个指标的损害程度。一个专家启发的过程被用来关联估计的预期，上限和下限风速的每一个程度的损害。然后，通过回归方程将增强型藤田量表与藤田量表进行相关。国家气象局于2007年2月实施了增强型尺度。目前的EF等级只适用于龙卷风强度。
The original Fujita Scale (F Scale) was introduced as a means of estimating the intensity of tornadoes and hurricanes by relating appearance of damage to wind speeds. The relationships were based on the extensive experience of Dr. Fujita but were never independently verified. Furthermore, the importance of construction quality was not recognized, and the number of damage indicators was limited. The Wind Science and Engineering group at Texas Tech University agreed to lead an effort to improve the original scale. The improved scale, known as the Enhanced Fujita Scale (EF Scale), defines 28 damage indicators and a number of degrees of damage for each one. A process of expert elicitation was used to relate estimates of expected, upper and lower bound wind speeds for each degree of damage. The Enhanced Fujita Scale was then correlated with the Fujita Scale by means of a regression equation. The National Weather Service implemented the Enhanced scale in February 2007. In its present form, the EF Scale is applicable only to tornado intensity.