Gridded Global Cultivation Intensities

Global digital databases of natural vegetation and land use were compiled, for use in climate studies, at 1 degree resolution from over 100 published sources. A series of 6 data sets, derived from the original compilations, was prepared and archived on tape at the National Center for Atmospheric Research (NCAR) (Matthews, 1984). The first is a vegetation data set representing natural (pre-agricultural) vegetation based on the UNESCO classification system. The second, this database, derived from the land-use compilation, is a cultivation-intensity data set defining the areal extent of presently-cultivated land in 1 degree cells. *Note: this is a Gridded Cultivation Intensities [values range from 1(min) to 5(max)] (1 degree x 1 degree).

为支撑气候研究工作，研究人员基于100余篇已发表文献的数据，以1度空间分辨率构建了全球自然植被与土地利用数字化数据集。研究人员基于上述原始数据集衍生出一套共6个子数据集，并将其归档存储于美国国家大气研究中心（National Center for Atmospheric Research, NCAR）的磁带介质中（Matthews, 1984）。第一个子数据集为植被数据集，基于联合国教科文组织（UNESCO）的分类体系构建，用于表征自然（农业开发前）植被的分布状况。本数据集为第二个子数据集，源自土地利用原始汇编数据，属于耕种强度数据集，用于明确1度网格单元内当前耕地的面积分布范围。*备注：本数据集为网格化耕种强度数据集，数值取值范围为1（最小值）至5（最大值），空间分辨率为1度×1度。