Falster Forest Edge Experiment

A forest edge field experiment was conducted on the island Falster in Southern Denmark in 2008. The dataset presented here are used in the publication 

Dellwik et al. (2023)  Forest edge representation in scaled experiments-A flexible approach for matching to field observations in Boundary Layer Meteorology. 

The file FalsterForestEdgeFlowStatistics contains the mean statistics of wind and turbulence data for the situation when the wind flows onto a perpendicular dense forest edge in the wind direction interval of 280 to 300 degrees. The data come from sonic anemometers mounted on two masts, one upwind and one downwind of the forest edge, and represent the mean statistics of the wind field, the second order moments and the skewness from the two met masts at the Falster Forest Edge experiment. The setup, treatment of the raw data and the selection for near-neutral atmospheric stratification are described in Dellwik et al. (2014). 

Dellwik, E., Bingöl, F. and Mann, J. (2014), Flow distortion at a dense forest edge. Q.J.R. Meteorol. Soc., 140: 676-686. https://doi.org/10.1002/qj.2155  

The file ForestHeightData.csv contains the X Y Z coordinates of airborne lidar point cloud data for a 40m wide section centered on the line from the met mast 1 (outside the forest) to the met mast 2 (inside the forest). The airborne lidar campaign was in 2007-2008. The coordinates of the two met masts are also listed in the file. 

The full point cloud from the 2007 scan can be downloaded from
https://dataforsyningen.dk/data/4657   

By using all the information in the full point cloud, the spatially varying forest density (PAD) can be estimated, using the algorithms presented in 

Arnqvist et al. (2020)  Biogeosciences, 17, 5939–5952, 2020.https://doi.org/10.5194/bg-17-5939-2020

于2008年在丹麦南部法尔斯泰岛边缘进行的森林边缘田野实验中，所呈现的此处数据集被应用于Dellwik等（2023）发表的论文《森林边缘表示：在边界层气象学中匹配实地观测的灵活方法》。该数据集包含文件FalsterForestEdgeFlowStatistics，其中记录了当风向处于280至300度之间时，风向垂直于密集森林边缘情况下的风速和湍流数据的平均值统计。这些数据来源于安装在两个林缘两侧的测风塔上的声学风速仪，代表了法尔斯泰森林边缘实验中两个气象塔的风场平均值统计、二阶矩和偏度。实验装置、原始数据处理以及近中性大气层结的选择在Dellwik等（2014）中有所描述。

Dellwik, E., Bingöl, F. 和 Mann, J. (2014), 《密集森林边缘的流动扭曲》，气象学季刊，140: 676-686. https://doi.org/10.1002/qj.2155

文件ForestHeightData.csv包含了从气象塔1（森林外）到气象塔2（森林内）为中心的40米宽区域的空中激光雷达点云数据的X Y Z坐标。空中激光雷达活动发生在2007-2008年。两个气象塔的坐标也列在该文件中。

2007年扫描的完整点云数据可从以下链接下载：https://dataforsyningen.dk/data/4657

通过利用完整点云中的所有信息，可以采用Arnqvist等（2020）中提出的算法估算空间变化的森林密度（PAD）。

Arnqvist, et al. (2020), 《Biogeosciences》，17, 5939–5952, 2020. https://doi.org/10.5194/bg-17-5939-2020