Strain measurements on 21 trees in Wytham Woods, UK

This data contains the strain and wind data collected for 21 trees in Wytham Woods, a mature temperate woodland in southern England, from September 2015 to June 2016. This data was collected in order to (a) extract the resonant frequencies of trees, (b) to estimate the critical wind speeds at which the trees would break and (c) to test a finite element model of tree-wind dynamics. The strain data was collected at 4Hz using two strain gauges per tree attached at 1.3metres on the trunk and approximately perpendicular to each other. The wind data provided were collected from the canopy walkway in Wytham Woods using a cup anemometer (Vector Instruments A100LK/5M) in winter and a Gill Sonic-1 in summer, the time resolution varies between these instruments. Local climate data, including long term wind data, are available from the Environmental Change Network (https://doi.org/10.5285/fc9bcd1c-e3fc-4c5a-b569-2fe62d40f2f5 or data.ecn.ac.uk). Full details about this dataset can be found at https://doi.org/10.5285/533d87d3-48c1-4c6e-9f2f-fda273ab45bc本数据集收录了2015年9月至2016年6月期间，于英格兰南部成熟温带林地怀瑟姆树林（Wytham Woods）内21棵树木采集得到的应变与风速数据。本数据集的采集初衷为：(a) 提取树木的共振频率；(b) 估算树木发生折断的临界风速；(c) 验证树木-风动力学有限元模型（finite element model）。应变数据以4Hz的采样率采集，每棵树木的树干1.3米高度处安装两个相互近乎垂直的应变片（strain gauge）。所提供的风速数据由怀瑟姆树林林冠步道上的仪器采集：冬季采用Vector Instruments A100LK/5M型杯式风速仪（cup anemometer），夏季则使用Gill Sonic-1型超声风速仪（sonic anemometer），两类仪器的时间分辨率存在差异。包含长期风速记录在内的本地气候数据可从环境变化网络（Environmental Change Network）获取，相关链接为https://doi.org/10.5285/fc9bcd1c-e3fc-4c5a-b569-2fe62d40f2f5 或 data.ecn.ac.uk。本数据集的完整详细信息可通过链接https://doi.org/10.5285/533d87d3-48c1-4c6e-9f2f-fda273ab45bc 查询获取。