Near-surface vegetation monitoring in Adventdalen, Svalbard (Rack #6, 2016-2018)

NDVI, GCC, soil temperature and soil water content data from Adventdalen, Svalbard. This data was collected with a time-lapse RGB camera and NDVI sensor installed on a two meter high metal rack to monitor tundra vegetation. The time-lapse photos have gone through a manual quality check and were automatically adjusted with an algorithm to correct for lateral and rotational movements. A mask was used to calculate Green Chromatic Channel (GCC) from the photos. The NDVI data was quality controlled by removing outliers that were two standard deviations removed from the mean value of the growing season, and by removing dates where there was snow on the ground (as indicated by the time-lapse photos). In addition, soil and surface temperature and soil moisture were measured to facilitate the interpretation of shifts in the vegetation indices.

本数据集包含来自斯瓦尔巴群岛阿德文代伦（Adventdalen）的归一化差分植被指数（NDVI，Normalized Difference Vegetation Index）、绿度色度通道（GCC，Green Chromatic Channel）、土壤温度及土壤含水量数据。该数据通过安装在2米高金属支架上的延时RGB相机与NDVI传感器采集，用于监测苔原植被。延时照片已完成人工质量核查，并通过算法自动校正了横向与旋转运动带来的偏移。通过掩膜（mask）处理，从照片中计算得到GCC数值。NDVI数据已完成质量控制：剔除偏离生长季均值±2倍标准差的异常值，并移除延时照片显示存在积雪的日期对应的数据集。此外，本数据集还同步采集了土壤温度、地表温度与土壤含水量数据，以辅助阐释植被指数的变化规律。