Holland et al. (2006) present a very interesting study on development and evaluation of a simple analytical model of tornado vortex flow and its impact on specified forest configurations. The authors also make reference to earlier work by Johannes Peter Letzmann (1885-1971) on near-surface tornado wind fields, dating back to 1923 and reviewed, for example, by Peterson <1992a). The authors are correct to say that Letzmann did not include information on the physics of tree response (which was unavailable in his time), even though he considered the question of whether and how twisted tree snapping occurred or how the observed tree damage should be interpreted. However, some other statements by Holland et al. (2006) about Letzmann's work can be misleading. The review by Peterson (1992a) alone is certainly not sufficient to assess fully the analytical model developed by Letzmann (1923) in his Ph.D. thesis and later summarized in a journal article (Letzmann 1925).
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机译：荷兰等。 （2006）提出了一个非常有趣的研究，其开发和评估了龙卷风涡流及其对特定森林形态的影响的简单分析模型。作者还引用了约翰内斯·彼得·莱兹曼（Johannes Peter Letzmann，1885-1971年）在近地表龙卷风风场上的早期工作，该工作可以追溯到1923年，例如，由Peterson <1992a进行了综述。作者正确地说，莱兹曼没有包括有关树木响应物理学的信息（这在当时是不可用的），尽管他考虑了是否以及如何扭曲树木并发生或如何解释观察到的树木破坏的问题。 。但是，荷兰等人的其他一些陈述。 （2006）关于莱兹曼的作品可能会产生误导。当然，仅Peterson（1992a）的评论不足以完全评估Letzmann（1923）在其博士学位中开发的分析模型。论文，随后在期刊文章中进行了概述（Letzmann，1925年）。
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