SNF VEGETATION COVER DATA: C. JARVIS

This data set documentation is currently in work. In the interim, an abstract of the entire Superior National Forest (SNF) data collection activity from which the SNF Vegetation Cover Data: C. Jarvis Data Set is a product is being provided. During the summers of 1983 and 1984, the National Aeronautics and Space Administration (NASA) conducted an intensive experiment in a portion of the Superior National Forest (SNF) near Ely, Minnesota, USA. The purpose of the experiment was to investigate the ability of remote sensing to provide estimates of biophysical properties of ecosystems, such as leaf area index (LAI), biomass and net primary productivity (NPP). The study area covered a 50 x 50 km area centered at approximately 48 degrees North latitude and 92 degrees West longitude in northeastern Minnesota at the southern edge of the North American boreal forest. The SNF is mostly covered by boreal forest. Boreal forests were chosen for this project because of their relative taxonomic simplicity, their great extent, and their potential sensitivity to climatic change. Satellite, aircraft, helicopter and ground observations were obtained for the study area. These data comprise a unique dataset for the investigation of the relationships between the radiometric and biophysical properties of vegetated canopies. This is perhaps the most complete dataset of its type ever collected over a forested region.

本数据集文档目前仍在编制过程中。在此过渡阶段，现将作为《苏必利尔国家森林植被覆盖数据：C.贾维斯数据集》来源的整套苏必利尔国家森林（Superior National Forest, SNF）数据采集活动摘要提供如下。1983年与1984年夏季，美国国家航空航天局（National Aeronautics and Space Administration, NASA）在美国明尼苏达州伊利市附近的苏必利尔国家森林部分区域开展了密集实验。本次实验旨在探究遥感技术能否实现生态系统生物物理属性的估算，例如叶面积指数（Leaf Area Index, LAI）、生物量以及净初级生产力（Net Primary Productivity, NPP）。研究区位于明尼苏达州东北部、北美寒温带针叶林南部边缘，中心坐标约为北纬48°、西经92°，覆盖面积为50×50平方千米。苏必利尔国家森林主体覆盖有寒温带针叶林。本次项目选用寒温带针叶林作为研究对象，原因在于其分类学特征相对简洁、分布范围极广，且对气候变化具有潜在敏感性。研究区获取了卫星、固定翼飞机、直升机以及地面观测数据。该数据集为植被冠层辐射特性与生物物理属性间关联的研究提供了独特的数据支撑，或许是迄今为止在林区收集的同类数据集中最为完整的一套。