The uncertainty on the the 50-year storm can be estimated from two widely used methods: the peak over threshold and the maximum model. Long records of wind speeds are usually but not always in agreement with the basic model assumptions. At moderate to high frequencies there is a good agreement among researchers on spectral shapes over homogeneous terrain assuming neutral atmospheric stability. Neutral stability at high wind speeds is a rule with xceptions and despite of high wind speeds an example from the Great Belt Coherence Experiment shows greatly reduced turbulence levels. At low frequencies there is still some discrepancies among model spectra. Due to modeling work based on the Great Belt Coherence Experiment the coherences are well predicted once the spectra are known. Strong wind turbulence in inhomogeneous terrain, which is often the setting of bridges, is an area of active research.
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机译：可以通过两种广泛使用的方法来估算50年风暴的不确定性：峰值超过阈值和最大模型。长期的风速记录通常但并非总是与基本模型假设一致。在中等至高频下，假设大气中性稳定，研究人员在均匀地形上的频谱形状方面达成了很好的共识。高风速时的中性稳定性是受干扰的规则，尽管风速高，但大带连贯性实验的一个例子显示湍流水平大大降低。在低频下，模型光谱之间仍然存在一些差异。由于基于Great Belt Coherence实验的建模工作，一旦知道了光谱，就可以很好地预测相干性。非均质地形中的强风湍流（通常是桥梁的环境）是积极研究的领域。
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