ABoVE: Synthesis of Burned and Unburned Forest Site Data, AK and Canada, 1983-2016

This record is for the dataset “ABoVE: Synthesis of Burned and Unburned Forest Site Data, AK and Canada, 1983-2016 ” at https://doi.org/10.3334/ORNLDAAC/1744. This dataset is a synthesis of field plot characterization data, derived above-ground and below-ground combusted carbon, and acquired Fire Weather Index (FWI) System components for burned boreal forest sites across Alaska, USA, the Northwest Territories, and Saskatchewan, Canada from 1983-2016. Unburned plot data are also included. Compiled plot-level characterization data include stand age, disturbance history, tree density, and tree biophysical measurements for calculation of the above-ground (ag) and below-ground (bg) biomass/carbon pools, pre-fire and residual post-fire soil organic layer (SOL) depths and estimates of combustion of tree structural classes. The measured slope and aspect for each site and an assigned moisture class based on topography are also provided. Data from 1019 burned and 152 unburned sites are included. From the estimates of combusted ag and bg carbon pools and SOL losses, the total carbon combusted, the proportion of pre-fire carbon combusted, and the proportion of total carbon combusted were calculated for each plot. FWI System components including moisture and drought codes and indices of fire danger were obtained for each plot from existing data sources based on the plot location, year of burn, and a dynamic start-up date (day of burn, DOB) from the global fire weather database. Data for soil characteristics are included in a separate file. This dataset can be downloaded at https://doi.org/10.3334/ORNLDAAC/1744.

本记录对应数据集“ABoVE：1983-2016年美国阿拉斯加与加拿大北部森林过火与未过火样地综合数据集”，访问链接为https://doi.org/10.3334/ORNLDAAC/1744。本数据集整合了1983至2016年期间，美国阿拉斯加州、加拿大西北地区与萨斯喀彻温省境内北部寒带森林过火样地的野外样地表征数据、反演得到的地上与地下燃烧碳储量数据，以及获取的火灾天气指数（Fire Weather Index, FWI）系统组分数据，同时纳入未过火对照样地的相关数据。经整合的样地级表征数据包括林分年龄、干扰历史、树木密度与树木生物物理测量参数，用于计算地上（above-ground, ag）与地下（below-ground, bg）生物量/碳库、火灾前与火灾后残留土壤有机层（soil organic layer, SOL）厚度，以及不同树木结构类别的燃烧量估算值。此外，本数据集还提供各样地的实测坡度、坡向，以及基于地形划分的湿度等级。本数据集共收录1019个过火样地与152个未过火样地的相关数据。基于地上与地下燃烧碳库的估算值以及SOL损失量，可针对每个样地计算总燃烧碳量、火灾前碳燃烧占比与总碳燃烧占比。基于样地位置、火灾发生年份，以及全球火灾天气数据库提供的动态起火日期（day of burn, DOB），研究人员从现有数据源中提取各单样地的FWI系统组分数据，包括湿度编码、干旱编码以及火灾危险指数。土壤特性数据单独存储于一个独立文件中。本数据集可通过该链接下载：https://doi.org/10.3334/ORNLDAAC/1744。